Dunlop Geomax AT81 Enduro Rear Tire
MSRP: $145.95
$116.76
Exact Fitment Guarantee
The Dunlop Geomax AT81 Enduro Rear Tire is the undisputed industry standard for cross-country, GNCC, and hard enduro off-road competition. Engineered specifically to replace motocross-specific tires that bounce off rocks and chunk knobs in technical woods terrain, the AT81 features a specialized off-road carcass design and an ultra-durable rubber compound formulated to conquer jagged roots, slick river rocks, mud bogs, and hard-packed logging roads.
The AT81 incorporates Dunlop's Lateral Groove tread block design on the shoulder knobs, which provides additional biting edges for side-hill traction and cambered rut carving. The center knobs are arranged in a staggered chevron pattern with recessed channels that provide immense drive traction on loose dirt and slippery shale. The tire casing utilizes two plies of high-strength nylon wrapped in a specialized cross-ply orientation, providing a plush, conforming footprint that wraps around square-edge obstacles rather than deflecting. An advanced wear-resistant polymer compound resists tearing, knob chunking, and abrasive degradation during multi-hour off-road events.
- Tire Sizing: Standard 18" off-road / enduro rear rim application (e.g. 110/100-18)
- Terrain Classification: All-Terrain Enduro (GNCC, singletrack, rocks, roots, hard enduro)
- Tread Design: Lateral Groove shoulder blocks with DIRTsponge compliant carcass
- Compound: High-density anti-chunking synthetic polymer blend
- Carcass: 2-ply high-strength cross-woven nylon carcass
### Step-by-Step Installation & Safety Protocols Installation utilizes standard tire levers and rim lube. Because the AT81 features a pliable off-road casing, bead seating is exceptionally smooth. Remove the rear wheel and deflate the existing tube. Spoon the old tire off the rim, clean the rim well, and check the rim lock for rubber pad deterioration. Apply lubricant to the AT81 beads, align the directional rotation indicator, and guide the heavy-duty tube (or off-road mousse) inside. Lever the bottom bead over the rim, secure the valve stem loosely with its retaining nut, and work the top bead into the rim center drop-channel. Inflate to seat beads, set trail operating pressure (typically 10.5 to 12.5 PSI for standard tubes, or 6 to 9 PSI with heavy-duty tubeless systems for extreme enduro), and torque the rim lock nut to 14 Nm.
### Maintenance & Pressure Setup Maintenance involves checking tire pressures prior to every trail ride and inspecting for puncture debris embedded between knobs.
Frequently Asked Questions
Q: What makes the AT81 better for woods riding than a motocross tire?
A: The AT81 features a more compliant carcass that flexes over rocks, roots, and trail obstacles, providing a larger, softer contact patch that finds traction where stiff motocross tires slip and deflect.
Q: Can I use the AT81 for occasional motocross track riding?
A: While the AT81 can handle casual motocross sessions, its softer off-road carcass and tread compound are optimized for woods, cross-country, and enduro terrain rather than high-load supercross jump landings.
Q: What is the recommended air pressure for technical singletrack?
A: For rocky, root-strewn singletrack using heavy-duty inner tubes, 10.5 to 11.5 PSI provides optimal traction without excessive risk of pinch flats. With bib mousse inserts, the AT81 delivers unbeatable traction and flat-proof reliability.
Q: How does the AT81 resist knob chunking on sharp shale?
A: The proprietary polymer matrix incorporates high-density molecular binders that flex under sharp rock shearing forces rather than tearing or cracking away from the casing.