WTB Nano TCS Light Fast Rolling Tire – 700 × 40

The WTB Nano TCS Light Fast Rolling 700 × 40 is one of the most proven endurance gravel tires on the planet—and for good reason. It’s the #1 tire choice for the Tour Divide, the world’s longest and most demanding mountain bike race, stretching from Canada to Mexico along the Rocky Mountains.

At speed, the Nano’s centerline tread rolls effortlessly across hardpack, pavement, and gravel roads. Surrounding that centerline, numerous micro knobs add lateral traction and predictable handling when conditions loosen up or terrain turns technical. The result is a tire that feels fast and efficient without ever feeling vague.

This version features WTB’s Light (LIGHT) casing, reducing rotational weight while still conforming to trail obstacles for improved comfort and control—an ideal balance for long-distance riders and bikepackers who count every gram but can’t afford failures.

Grip and efficiency are handled by Dual DNA rubber (DNA2): a firm, long-wearing center tread for speed, paired with softer side knobs for cornering confidence. Flat protection comes from SG2 puncture protection, which provides a continuous layer of defense from bead to bead—critical for multi-day rides far from help.

Built on WTB’s TCS Tubeless system, the Nano offers reliable tubeless sealing, improved bead security, and the ability to run lower pressures for comfort and traction.

Why Choose the WTB Nano

• Proven at the highest level of endurance racing (Tour Divide)

• Fast-rolling centerline with confident off-road traction

• Lightweight casing optimized for long-distance efficiency

• Excellent puncture protection without excessive stiffness

• Ideal for gravel racing, bikepacking, and endurance adventure rides

Technology Highlights

• LIGHT Casing: Reduced weight with excellent trail conformity

• FR (Fast Rolling): Speed-focused tread design

• DNA2 Dual Compound: Firm center, softer shoulders for control

• TCS Tubeless Compatible: Secure bead and sealant-based tubeless setup

• SG2 Protection: Bead-to-bead puncture resistance

Technical Details

• Size: 700 × 40

• ISO: 622

• Construction: Tubeless Ready (Folding Bead)

• TPI: 120

• Max PSI: 65

• Tread Style: Knobby

• Sidewall: Non-reflective

• Features: LIGHT / FR / SG2 / TCS / DNA2

If your rides are measured in days instead of hours—and reliability matters as much as speed—the WTB Nano TCS Light Fast Rolling is a tire with a resume few others can match.