Dunlop Geomax Trial TL01 Rear Tire – 120/100R18 M/C 68M TL

Dunlop Geomax Trial TL01 Rear Tire - 120/100R18 M/C 68M TL

Part #: 45262501

The rear tire in a trials section carries a different burden than the front. It's where the power goes down, where the bike pivots, and where a loss of traction ends the section. On slick rock, wet roots, or cold shaded surfaces, the margin between a clean run and a dab comes down to how well the rear tire holds its grip under torque.

Dunlop built the Geomax TL01 rear from the ground up for exactly that situation. New tread pattern, new compound, new groove geometry — each piece developed specifically around the demands of competition trial and technical single-track riding where grip at low speed and high load is everything.

The High-Adhesion Compound runs an oil-infused formulation that keeps the rubber flexible under the kind of slow, heavy loads trials riding puts on a rear tire. That flexibility keeps the contact patch conforming to the rock surface rather than skating across it. Carbon elements in the compound take impact energy and convert it to heat, which brings the rubber up to optimal grip temperature fast and keeps it there on cold or shaded terrain. The Specialized Groove Channel Technology in the shoulder blocks gives each block three times the structural strength of the previous D803GP design — meaning the blocks resist folding and tearing under the lateral and rotational forces of technical maneuvering without losing their shape or effectiveness through a full day of riding.

120/100R18. Radial construction. Tubeless. Load Index 68, Speed Rating M. Rear fitment.

Features at a Glance

High-Adhesion Compound (H-AC) — oil-infused rubber stays flexible under slow-speed, high-torque loads
Carbon Element Heat Technology — converts impact energy to heat for grip on cold and slick surfaces
Specialized Groove Channel Technology (SGCT) — shoulder blocks 3x stronger than the D803GP design
Optimized Rear Tread Pattern — developed for maximum traction and stability under power in trials conditions
Radial Construction — tubeless, built for 18-inch rear wheel applications
Rear Specific Fitment — designed for the torque and load demands of the rear wheel position

Specs

Part Number: 45262501
Size: 120/100R18 M/C
Load Index: 68
Speed Rating: M
Construction: Radial
Tire Type: MX / Off-Road / Trial
Sidewall: Blackwall
Tube Type: Tubeless (TL)
Fitment: Rear

Frequently Asked Questions

Is the rear TL01 tubeless or does it need a tube?

Tubeless. The TL designation means this tire seals directly on a compatible tubeless rim without a tube. Confirm your rim is tubeless-compatible before fitting.

How does the radial rear differ from the bias front?

The front TL01 runs bias construction — stiffer, more predictable for steering input at the front. The rear runs radial, which gives better flexibility under the rotational and lateral loads the rear tire handles under power. Different construction for different positions, both optimized for trials use.

What makes this better than the D803GP on slick rock?

Two things primarily. The H-AC compound stays softer and more compliant on cold, slick surfaces than the D803GP formulation, and the carbon element technology generates heat from impact to bring grip up faster. The SGCT shoulder blocks also hold their shape better under aggressive rear wheel torque than the older block design.

Can I run this tire on technical single-track or is it only for competition?

Both. The TL01 was built around competition trial requirements but the grip and control characteristics work just as well on demanding single-track where slow-speed technical riding is the norm. It's not designed for general motocross or enduro use.

Is this tire road legal?

No. The TL01 is an off-road competition tire without DOT approval for street use. Closed-course trial and off-road trail riding only.

What's the correct rim width for the 120/100R18?

A rim width between 2.50 and 3.00 inches is the general recommendation for a 120mm wide rear tire. Check your wheel manufacturer's specs to confirm the optimal mounting width for your specific setup.