Dominate soft-to-intermediate terrain tracks and technical off-road trails with the ultimate traction setup: the Dunlop Geomax MX34 Rear Tire (Part Number: 45273513). Explicitly engineered with an 18-inch cross-country profile, this high-performance intermediate dirt bike tire introduces revamped block configurations to deliver relentless drive hookup and maximum acceleration across the lower 48 states.
Why Riders Shop Mad Lads Moto
- Orders placed today ship same-day or next-day across the lower 48 states!
- Progressive Cornering Block Technology (PCBT): Built with Dunlop's patented block-within-a-block design on the shoulder knobs, drastically increasing cornering grip and sliding predictability when navigating deeply rutted singletrack or loamy berms.
- 30% Longer Peak Performance: An updated carcass material profile significantly enhances structural damping and impact absorption, allowing the tire to maintain its rigid, predictable flex up to 30% longer than traditional off-road compounds.
- Oversized Center Tread Footprint: Designed with a rear tread pattern featuring center blocks that are 11% taller and 44% wider than previous generations, providing unmatched straight-line acceleration and instant drive bite out of corners.
- Pro-Level Mud Evacuation: Advanced mud evacuation channels shed heavy clay, wet sand, and slick soil immediately, preventing clogged lugs and keeping your traction profile perfectly clear.
- Matching Sets Available: Eliminate front-end sliding instability by pairing this aggressive rear tire with our matching Geomax MX34 21-inch front tires.
Confirmed Fitment Information
This wide-profile 120/90-18 tube-type (TT) rear tire is engineered for a standard 18-inch rear wheel rim width of 2.15" to 2.50". Carrying a 65M load and speed rating, it safely supports up to 639 lbs at sustained off-road trail speeds up to 81 mph. Unlike 19-inch motocross configurations, this 18-inch tire features a taller sidewall optimized for impact compliance, making it the factory-spec size or premium performance replacement tire for the following big-bore cross-country, enduro, and dual-sport platforms:
- KTM XC / XC-F / XC-W / EXC-F (150cc, 250cc, 300cc, 350cc, 450cc, 500cc): 2000 – 2027+ (Factory Rear Size for off-road/enduro configurations)
- Husqvarna FX / TE / FE (120cc, 250cc, 300cc, 350cc, 450cc, 501cc): 2014 – 2027+ (Factory Rear Size for off-road/enduro configurations)
- GASGAS EX / EX-F / EC / EC-F (250cc, 300cc, 350cc, 450cc): 2021 – 2027+ (Factory Rear Size)
- Yamaha YZ250FX / YZ450FX / WR250F / WR450F: 2015 – 2027+ (Factory Rear Size)
- Honda CRF250RX / CRF450RX / CRF450X: 2017 – 2027+ (Factory Rear Size)
- Kawasaki KX250X / KX450X: 2021 – 2027+ (Factory Rear Size)
- Stark Varg Electric Motocrosser: 2023 – 2026+ (Factory spec footprint for models running the 18-inch off-road rear wheel option)
- Fitment Safety & Application Note: This tire profile is labeled as NHS (Not for Highway Service) and is engineered strictly for closed-course closed track competition and off-road trail use. As a tube-type (TT) tire, it requires a standard 18-inch heavy-duty inner tire tube or off-road mousse insert for proper installation on laced wire-spoke wheels.
Technical Specifications
| Feature |
Specification |
| Brand |
Dunlop Tires |
| Model Line |
Geomax MX34 Series (Rear) |
| Tire Size |
120/90-18 |
| Terrain Profile |
Soft to Intermediate Terrain / Loamy / Sandy Soil Mixes |
| Load & Speed Index |
65M (Max 639 lbs / 81 mph) |
| Construction / Type |
Bias Ply / Tube-Type (TT) / NHS (Not for Highway Service) |
| Sidewall Style |
Blackwall |
| Manufacturer Part Number |
45273513 |
US Dollars
