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650B

Maxxis Rekon 27.5-inch - Tubeless
$67.20 - $90.00
The Rekon is an aggressive trail tire inspired by the Ikon for intermediate and technical terrain. Wide knobs down the middle provide control under braking, and L-shaped side knobs ensure support when carving loose turns. With confidence like this, you can race more and scout less with the Rekon.
Maxxis Dissector 27.5-inch
$68.00 - $90.00
Troy Brosnan's go-fast signature tire. - Ideal for dry, fast trails - Tubeless compatible - Wide Trail casing optimized for 30-35mm rims Designed in conjunction with Aussie DH racer, Troy Brosnan, the Dissector seeks to minimize drag while retaining cornering control. This versatile tire can be used as a front, a pair, or as a rear, depending on trail conditions.
Maxxis Aggressor 27.5-inch
$70.00
The new standard in enduro tires - Dual-compound - Excellent all-around performance - Tubeless Ready (TR) - Wide trail (WT) casing is optimized for 30-35mm inner width rims The Aggressor is designed for high-speed modern mountain bike trails. Advanced knob shaping creates extra gripping edges, and reinforced side knobs offer enhanced stability when cornering at speed. An all-around trail tire excelling on everything from loose cross country race courses to heavy all-mountain riding.
Maxxis Assegai 27.5-inch
$70.00 - $90.00
World Cup Champion Greg Minnaar's signature tire. - Tubeless compatible - Wide Trail casing optimized for 30-35mm rims The Maxxis Assegai tire is named after the iron-tipped spear used by the Zulu people of South Africa. Greg Minnaar, a native of South Africa, thought it was a fitting name for a tire ready to do battle on the mountain. The tall knobs punch through dust and loam to find traction but also offer support and confidence on wet roots and rocks. While other tires excel only in certain conditions, the Maxxis Assegai is built to go fast everywhere.
Maxxis Minion SS 27.5-inch
$70.00
A semi-slick with dependable Minion cornering capabilities - Semi-slick center with Minion side knobs - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims The Minion SS fills the gap between a fast-rolling XC tire and a grippy DH tire by including a cluster of short, ramped knobs flanked by the much-loved Minion side knobs. This combination creates a fast-rolling tire with a square profile that hooks up in loose terrain. Perfect for summer shredding.
Maxxis Aspen 27.5-inch
$75.00
High-volume casing, low-profile tread - Aggressive side knobs - Dual Compound - Lightweight XC race tire - Race-inspired low profile design Maxxis has done it again with its latest XC race tire. The new Maxxis Aspen pushes the limits of a lightweight XC tire designed to have minimal rolling resistance. The Aspen is designed with a high-volume casing to smooth out the roughest roots and rocks, while the dual compounds give optimal traction in the corners. So, if crossing the finish line first is your top priority, then the Aspen was designed for you.
Maxxis Shorty Gen 1 27.5-inch
$75.00
A versatile mid-spike for deep loam or loose powder - High-volume casing - Mid-spike tread design Our pro athletes needed a mid-spike tire that could handle dry, loose, blown-out corners as well as a bit of mud. The Shorty is that tire. A high-volume casing makes the Shorty a more versatile option than a dedicated mud spike like our Wet Scream. Large, tall, and slightly staggered side knobs penetrate loose soil to provide predictable, stable cornering at warp speeds.
Maxxis Re-Fuse 27.5-inch
$75.50
Our most durable road offering - Diamond knurled slick design - MaxxShield for maximum puncture resistance - Training tire Our most popular training tire, providing excellent traction, durability, and plenty of road miles in any condition. Maxx Shield helps provide a tire that Re-Fuses to puncture.
Maxxis Minion DHF 20 Year Limited Edition 27.5 x 2.50
$80.00
The Minion DHF has become the benchmark for riders wanting maximum control in loose and muddy conditions. - Directional ramped center knobs provide low rolling resistance - Minion signature channel cut side knobs provide excellent cornering traction - Intended use: loose, loose over hard, medium, wet - 20 Year Limited Edition - Tubeless - Folding Bead - 3C MAX TERRA - EXO Protection - Wide Trail - 60 TPI - Weight: 943g
Maxxis Rekon+ 27.5-inch
$85.00 - $110.00
Aggressive plus tire inspired by the Ikon+ - 27.5+ tire - Designed for aggressive XC trails The Rekon+ is an aggressive trail tire inspired by the Ikon+ for intermediate and technical terrain. Wide knobs down the middle provide control under braking, and L-shaped side knobs ensure support when carving loose turns. With confidence like this you can race more and scout less with the Rekon+.
Maxxis Shorty Gen 1 Downhill 27.5-inch
$86.00
A versatile mid-spike for deep loam or loose powder - High-volume casing - Mid-spike tread design Our pro athletes needed a mid-spike tire that could handle dry, loose, blown-out corners as well as a bit of mud. The Shorty is that tire. A high-volume casing makes the Shorty a more versatile option than a dedicated mud spike like our Wet Scream. Large, tall, and slightly staggered side knobs penetrate loose soil to provide predictable, stable cornering at warp speeds.
Maxxis Shorty
$88.00 - $106.00
- Gen 2 Revised tread pattern - New knob layout based on feedback from World Cup DH and EWS riders - "Doublewide" knob now split into two individual knobs - More supportive cornering knobs - Additional siping to enhance braking and cornering traction - Raised ridges on casing to promote mud clearing
Maxxis Aggressor DoubleDown 27.5-inch
$90.00
The new standard in enduro tires - Dual-compound - Excellent all-around performance - Tubeless Ready (TR) - Wide trail (WT) casing is optimized for 30-35mm inner width rims The Aggressor is designed for high-speed modern mountain bike trails. Advanced knob shaping creates extra gripping edges, and reinforced side knobs offer enhanced stability when cornering at speed. An all-around trail tire excelling on everything from loose cross country race courses to heavy all-mountain riding.
Maxxis High Roller II DoubleDown 27.5-inch
$95.00 - $100.00
The second generation of the legendary High Roller - Easily clears debris - Open tread design - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims An open and aggressive tread design gives the High Roller II excellent soil penetration and mud-clearing ability. A square profile provides a solid, consistent feel across the knobs. Modified knobs on the shoulder and center improve braking performance and traction on hard surfaces. An excellent choice for technical, loose terrain.
Maxxis Shorty Gen 1 DoubleDown 27.5-inch
$95.00
A versatile mid-spike for deep loam or loose powder - High-volume casing - Mid-spike tread design Our pro athletes needed a mid-spike tire that could handle dry, loose, blown-out corners as well as a bit of mud. The Shorty is that tire. A high-volume casing makes the Shorty a more versatile option than a dedicated mud spike like our Wet Scream. Large, tall, and slightly staggered side knobs penetrate loose soil to provide predictable, stable cornering at warp speeds.
Maxxis Assegai DoubleDown 27.5-inch
$100.00
World Cup Champion Greg Minnaar's signature tire. - Tubeless compatible - Wide Trail casing optimized for 30-35mm rims The Maxxis Assegai tire is named after the iron-tipped spear used by the Zulu people of South Africa. Greg Minnaar, a native of South Africa, thought it was a fitting name for a tire ready to do battle on the mountain. The tall knobs punch through dust and loam to find traction but also offer support and confidence on wet roots and rocks. While other tires excel only in certain conditions, the Maxxis Assegai is built to go fast everywhere.
Maxxis Dissector Downhill 27.5-inch
$100.00
Troy Brosnan's go-fast signature tire. - Ideal for dry, fast trails - Tubeless compatible - Wide Trail casing optimized for 30-35mm rims Designed in conjunction with Aussie DH racer, Troy Brosnan, the Dissector seeks to minimize drag while retaining cornering control. This versatile tire can be used as a front, a pair, or as a rear, depending on trail conditions.
Maxxis Minion DHF DoubleDown 27.5-inch
$100.00
The standard by which all tires are judged - Large cornering blocks - Ramped, directional tread design - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims With a tread design that deftly balances rolling speed with braking and cornering traction, it's hard to find fault with the Minion DHF. That's probably why it's one of the most imitated tires in mountain biking. Whether riding local trails, a backcountry epic, racing enduro, or World Cup downhill, there's a Minion DHF spec to meet your needs.
Maxxis Minion DHR II DoubleDown 27.5-inch
$100.00
Refined, redesigned, and ready to shred any line - Ramped and siped tread to roll fast and track straight under braking - Wide trail (WT) casing specs are optimized for 30-35mm inner width rims With side knobs borrowed from the legendary Minion DHF but widened to provide more support, the DHR II corners like no other. The center tread features ramped leading edges to improve acceleration and sipes to create a smooth transition when leaning the bike. Paddle-like knobs on the center tread dig in under hard braking and help keep the bike under control. Pair it with a Minion DHF up front for the ultimate aggressive trail riding tire combo!
Maxxis Minion DHF
$106.00
- The DHF incorporates ramped knobs for low rolling resistance and channel-cut knobs to increase gripping edges, giving straight-line control and precise cornering. - The reference in Downhill and Trail tires - Front specific design, but the DHF also makes an excellent option for a rear tire, with its balanced driving, braking, and cornering traction - Plus sizes available - Wide Trail casing optimized for 30—35mm rims
Origin8 Vortex 27.5-inch
$36.49
- Smooth, fast rolling tread with water evacuating grooves and raised, textured shoulder blocks - Provides unrivaled grip in wet road conditions - Alternating, slightly raised shoulders grip well even over loose debris - Reflective sidewall striping keeps you seen and safe on your early morning or late night commute - Magnitude III level puncture protection - a 60x60 TPI Nylon layer beneath the tread surface - Style: Standard - Size: 27.5" x 2.0 - ISO: 584 - Bead: Wire - Belted: Nylon 60 - PSI: 65 - Weight: 655 - TPI: 60 - Reflective Sidewall: Yes
Panaracer Col de La Vie Randonnee
$28.90 - $34.99
The Col De La Vie has gained an enviable reputation as the tire for your touring adventures. Blending the perfect combination of durability, weight and feel, the Col De La Vie will help take you on those unforgettable touring adventures in safety and confidence. - Smooth-rolling tire is designed for touring and randoneering - Recessed tread provides more traction than slick tires
Panaracer Pasela
$28.90 - $35.00
Pasela is Panaracer's standard all around touring or urban commuting tire. Its comprehensive size range ensures that you can find a Pasela for most any usage. Ride it and trust it. - Steel (Wire) bead
Panaracer Pari-Moto
$39.99 - $50.00
- Perfect for urban duty mountain bikes or 650b touring bikes - Fast enough for paved roads and strong enough for gravel - Folding Aramid bead
Panaracer T-Serv ProTite
$44.99 - $53.99
T-Serv ProTite is a great performance tire for urban city use, incorporating ZSG compound, 400D Lite Extra Cord, and ProTite puncture-resistant technologies. Hands down, T-Serv is the best urban strength-to-weight-ratio tire on the market today. Need to get through your urban jungle quickly and reliably? T-Serv is the answer. - Urban/Commuter tire - Aramid (Kevlar) folding bead - Max PSI: 90
Panaracer GravelKing SK
$49.99 - $65.00
Looking for a tire that's more tread aggressive and wider than the mixte-tread narrower Gravel King? The GravelKing SK might just be the tire you need for the more hardcore roads. Aggressive knobs, ZSG Natural rubber compound, puncture protection breaker and AX-A special low rolling resistance casing make the Gravel King a go-anywhere tire. - Black multi-use gravel tread - Aramid (Kevlar) folding bead
Panaracer GravelKing
$50.00 - $59.99
Gravel road riding is all the rage at the moment. It's great for cyclists who want to leave sealed roads behind and enjoy the freedom of cycling on unpaved roads. Designed to suit diverse touring styles, the GravelKing uses a mixture of properties that also accommodate on-road cycling. Featuring ZSG Natural compound, anti-flat Casing, and Advanced Extra Alpha Cord. - Black multi-use gravel tread - Aramid (Kevlar) folding bead
Panaracer GravelKing SK Plus
$59.99 - $75.00
GravelKing SK Plus has a semi-knobby tread pattern with a super-tough puncture belt for aggressive gravel roads. GravelKing SK Plus has side reinforcement with Protite and a bead-to-bead nylon puncture belt, resulting in a 4-ply, super-tough casing.
Panaracer Gravelking SS
$59.99
- The SS and SS+ feature an all-new tread pattern consisting of a smoother, diamond pattern center with more aggressive side lugs. - This tread pattern allows the rider to keep speed going into corners and maintain control throughout any transition a gravel ride could present. - The GravelKing SS incorporates a supple 126 TPI casing with a nylon puncture resistant belt and Panaracer's proprietary ZSG (Zero Slip Grip) compound. - The SS+ uses the same build as the SS but adds a bead-to-bead layer of Panaracer's ProTite puncture material for even more protection against tread and sidewall cuts for those extra demanding courses or rides with sharp flint rock.
Panaracer Romero HO
$59.99 - $63.49
Panaracer Romero High Output tire utilizes a triple compound and our Anti-Flat Plus technology that combines bead-to-bead protection with a rubber belt for added protection at low pressure. - 120 TPI XC/Enduro model utilizes a dual compound under the sidewall protection
Panaracer Romero ST
$64.99
Panaracer Romero Super Tough tire utilizes a triple compound and our Anti-Flat Plus technology that combines bead-to-bead protection with a rubber belt for added protection at low pressure. - 60 TPI DH/Enduro version utilizes a triple compound and Anti-Flat Plus technology that combines bead-to-bead protection with a rubber Bead Armor for added protection at low pressure
Panaracer Aliso ST
$68.99
Aliso Super Tough tire utilizes a triple compound and our Anti-Flat Plus technology that combines bead-to-bead protection with a rubber belt for added protection at low pressure.
Panaracer Gravelking SS+
$69.99 - $74.99
- The SS and SS+ feature an all-new tread pattern consisting of a smoother, diamond pattern center with more aggressive side lugs. - This tread pattern allows the rider to keep speed going into corners and maintain control throughout any transition a gravel ride could present. - The GravelKing SS incorporates a supple 126 TPI casing with a nylon puncture resistant belt and Panaracer's proprietary ZSG (Zero Slip Grip) compound. - The SS+ uses the same build as the SS but adds a bead-to-bead layer of Panaracer's ProTite puncture material for even more protection against tread and sidewall cuts for those extra demanding courses or rides with sharp flint rock.
Pirelli Velo Cycl-e GT
$49.90 - $54.90
- The Cycl-e GT is a tire developed to enhance the dynamic characteristics of the modern riding style, whether it is taken in the city or in the twisty roads of the countryside: That's where Pirelli's famous 2-wheels expertize shines. - Motorbike derived profile and tread design for superior handling - Outperforms on safety and built to match rolling and puncture protection industry standard - Cap & base tread construction guarantees grip and rolling on the outer rubber, and protection and reliability on the inner - Solid multi-ply overlapping casing structure - ECE-R75 compliant - Best in class wet grip
Pirelli Velo Cinturato Gravel H 650B
$69.90
- Low profile and compact tread spacing for riding quickly and confidently over any kind of hardpack terrain, whether dry or wet - SpeedGRIP Compound formulation for on and off-road rolling efficiency coupled with high tear resistance and high wet grip - High-strength woven Nylon fabric from bead to bead for added cut and puncture protection - Multi-ply 127tpi Nylon casing construction - Tubeless-ready aramid folding bead optimized for wide rims and lower pressure riding
Pirelli Velo Scorpion Enduro S
$74.90 - $84.90
- Aggressive Riding in Loose and Soft Terrain - Tall profile and widely spaced tread for aggressive riding styles on any kind of loose and soft terrain, whether for dry or muddy conditions due to the SmartGRIP Compound. - The best choice when cornering speed in demanding terrains is fundamental, all with a high level of reliability for a longer lifespan.
Pirelli Velo Scorpion Trail R
$74.90
- Rear Specific Performance in Mixed Terrain - The R model is our rear specific design: added traction enhancing pedaling and braking and durability without compromising performance over a mixed variety of terrain, maximized for both dry or wet conditions from the SmartGRIP Compound. - All with a high level of reliability for a longer lifespan: the best combo with an M on front for a balanced riding experience.
Pirelli Velo Cinturato Gravel H
$78.90 - $82.90
- Low profile and compact tread spacing for riding quickly and confidently over any kind of hardpack terrain, whether dry or wet - SpeedGRIP Compound formulation for on and off-road rolling efficiency coupled with high tear resistance and high wet grip - High-strength woven Nylon fabric from bead to bead for added cut and puncture protection - Multi-ply 127tpi Nylon casing construction - Tubeless-ready aramid folding bead optimized for wide rims and lower pressure riding
Pirelli Velo Cinturato Gravel H
$78.90
- Low profile and compact tread spacing for riding quickly and confidently over any kind of hardpack terrain, whether dry or wet - SpeedGRIP Compound formulation for on and off-road rolling efficiency coupled with high tear resistance and high wet grip - High-strength woven Nylon fabric from bead to bead for added cut and puncture protection - Multi-ply 127tpi Nylon casing construction - Tubeless-ready aramid folding bead optimized for wide rims and lower pressure riding
Pirelli Velo Cinturato Gravel M
$78.90 - $82.90
- Medium profile and tread spacing for riding quickly and confidently over a mixed variety of terrains, from hard to soft, whether for dry or wet - SpeedGRIP Compound formulation for on and off-road rolling efficiency coupled with high tear resistance and high wet grip - High-strength woven Nylon fabric from bead to bead for added cut and puncture protection - Multi-ply 127tpi Nylon casing construction - Tubeless-ready aramid folding bead optimized for wide rims and lower pressure riding
Pirelli Velo Scorpion Enduro M
$84.90
- All-Round Performance for Mixed Conditions - Medium knob height and tread spacing for optimal balance between grip and rolling speed over a mixed variety of terrain, from hardpack to loose and soft, maximized for both dry or wet conditions from the SmartGRIP Compound. - The best choice for trails where the terrains can vary and grip is fundamentally key, but without sacrificing rolling speed. All with a high level of reliability for a longer lifespan.
Pirelli Velo Scorpion Enduro R
$89.90
- Rear Specific Performance for Mixed Terrain - The R model is our rear specific design: added traction on either pedaling and braking durability without compromising performance over a mixed variety of terrain, maximized for both dry or wet conditions due to the SmartGRIP Compound. - All with a high level of reliability for a longer lifespan: the best combo with an M on front for a balanced riding style.
Pirelli Velo Scorpion E-MTB R
$94.90
- Ultra-Heavy Duty for Aggressive Riding - The R model is our rear specific design: added traction on both pedaling and braking durability without compromising rolling performance over a mixed variety of terrain, maximized for both dry or wet conditions due to the E-MTB specific SmartGRIP+ Compound. - All with a new standard of rubber lifespan and casing reliability from incorporating the HyperWALL construction. - Best paired with an M on front for a balanced riding style.
Pirelli Velo Scorpion E-MTB S
$94.90
- Ultra-Heavy Duty for Aggressive Riding - Tall profile and widely spaced tread for maximum grip on any kind of loose and soft terrain, maximized for dry or wet conditions due to the E-MTB specific SmartGRIP+ Compound. - The best choice when riding in demanding terrain, all with a new standard of rubber lifespan and casing reliability from incorporating the HyperWALL construction.
Ritchey WCS Trail Bite Tire: 27.5-inch Tubeless
$69.95
In 1984 Tom was the first to appropriate road tire technology for mountain bike tire design by introducing tread wear analysis, higher TPI and more compliant rubber compounds. Pioneering what he called Vector Force Analysis, he developed trail-specific tread patterns and technology for MTB tires. The result was the first ever rotation-specific tire, as well as the first front- and rear-specific treads. The newest mountain bike tires to the Ritchey line are no strangers to VFA; featuring a wider, reinforced casing to handle a more aggressive terrain, the Bite and Drive are the culmination of years of analysis for all mountain riding. Bite: front or rear, rotation-specific tread that bites into the terrain for excellent control in all conditions - VFA Tread Design - 7mm StrongHold bead-to-bead casing reinforcement (WCS) - Tubeless-ready (WCS) - WCS (120 TPI) or Comp (30TPI) levels - 795g (650b WCS)
Ritchey Z-Max Evolution WCS 27.5-inch
$69.95
Ritchey's signature mountain bike tread pattern for well over a decade, the Z-Max Evolution is the culmination of years of development and VFA design. Tread lugs are spaced wider and shortened for faster handling, reduced rolling resistance, and lighter weight. WCS version features dual compound and is tubeless-ready—softer sides enhance cornering while the firmer center section rolls faster and is more durable. - Tubeless Ready (WCS) - Weight: 586g (27.5 x 2.1") / 710g (27.5 x 2.25")
Ritchey Z-Max Evolution Plus Tire
$79.95
Ritchey's signature mountain bike tread pattern for well over a decade, the Z-Max Evolution is the culmination of years of development and VFA design. Tread lugs are spaced wider and shortened for faster handling, reduced rolling resistance and lighter weight.
Schwalbe Tough Tom
$25.00 - $26.00
- Tread inspired by the Nobby Nic - K Guard puncture protection
Schwalbe Nobby Nic
$31.00 - $95.00
- For Trail and All Mountain - Aggressive tread design with stable shoulder blocks - Lightweight and extremely versatile - Significantly improved self-cleaning - Available in Super Ground, Super Trail and TwinSkin construction - Available in Addix Soft, Addix Speegrip and Addix Performance compound
Schwalbe Big Betty
$44.00 - $101.00
- For Downhill and Enduro - Long-supported brake edges - Extra strong shoulder knobs - Good self-cleaning properties - Available in Super Downhill, Super Gravity and BikePark construction - Available in Addix Ultra Soft, Addix Soft and Addix Performance compounds
Schwalbe Magic Mary Addix
$44.00 - $103.00
- The favourite among downhill and enduro experts. - The perfect choice for virtually any track. - Intermediate tread: maximum brake traction and corner grip even on extremely muddy terrain thanks to strong shoulder studs and the aggressive, open tread design.
Schwalbe Magic Mary Addix 27.5-inch
$44.00 - $103.00
- The favorite among downhill and enduro experts. - The perfect choice for virtually any track. - Intermediate tread: maximum brake traction and corner grip even on extremely muddy terrain thanks to strong shoulder studs and the aggressive, open tread design.
Schwalbe G-One Allround 27.5-inch
$48.00
The Schwalbe One family provides the right tire for the latest gravel bike trend. The smooth rolling G-One profile and Tubeless Easy technology make it a pleasure to ride over forest paths and rolling fields. - Tubeless-Easy with MicroSkin fabric for gravel riding - OneStar compound helps to achieve an extremely low rolling resistance
Schwalbe One 650B
$51.00
Schwalbe One Tires. Schwalbe's fastest and most reliable competition tire. Featuring a the new OneStar Triple Compound.
Schwalbe Smart Sam Performance Line 27.5-inch
$59.00
The tread of the Smart Sam is modern and balanced at the same time. The compact central rib provides comfortable rolling; the edged outer lugs guarantee optimized off-road-grip. For this reason, Smart Sam is reliable in every condition and even rolls well on roads. - Double Defense: The twin protector of High-Density Guard + SnakeSkin. More safety for light off-road tires is impossible. - Folding Bead
Schwalbe Marathon Plus Tire 27.5-inch
$59.09
Schwalbe's Marathon Plus is legendary for durability and protection. Their nearly impenetrable 5mm-thick SmartGuard layer almost eliminates flats over the course of the tire's excellent, long life. Whether you're setting out on a cross-country bike tour, cruising on a tandem, or just want peace of mind during your daily commute, the Marathon Supreme is in it for the long haul.
Schwalbe Nobby Nic Addix Tubeless 27.5-inch
$62.00
- The all-rounder that works in every situation, no matter the weather, no matter the terrain. - Widest possible range of use: for tour and all-mountain, for difficult cross-country tracks as well as technically challenging enduro trails. - Tread design: excellent traction and braking performance thanks to special central stud arrangement, large shoulder studs for excellent control on tricky trails.
Schwalbe Rocket Ron Addix 27.5-inch
$62.00 - $92.00
- This XC Rocket combines speed and corner control at the highest possible level. - An excellent all-rounder for racetracks. - Tread design: balanced proportion between stable studs and sufficient gaps for excellent rolling characteristics and amazing self-cleaning properties.
Schwalbe Marathon E-Plus
$63.00
- Smart DualGuard Protection - Addix-E Compound - ECE-R75 certification makes the tires ready for E-Bikes of all classes
Schwalbe Hans Dampf II Addix
$64.00 - $103.00
- Trails, corners, berms, tables, kickers and everything else that's fun to ride are where the NEW HANS DAMPF feels most at home. - Extended limits due to greater stability, durability and performance. - Semi-open block arrangement for excellent self-cleaning with low rolling resistance - Aggressive smaller shoulder blocks for grip and control on loose and loamy ground