The Gates Carbon Drive CDX CenterTrack 108T belt embodies the carbon belt drive technology from the world of high-performance motorcycles and dragsters, now perfected for urban, trekking, gravel, and MTB bikes. With its 108 teeth for 1188 mm length and 11 mm pitch, this all-black belt (black/black) offers a clean, silent, and durable alternative to the traditional chain.

Technical Overview

This 12 mm wide belt uses an innovative composite material: a weather-resistant polyurethane body, reinforced with carbon fiber tension cables that eliminate any stretching. Weighing only 87 grams, it rivals a metal chain in efficiency and strength, while guaranteeing up to twice its lifespan. The CenterTrack profile (central guide groove) ensures perfect retention on CDX sprockets, even in difficult conditions (mud, snow, sand, ice).

Technical Highlights

• Maintenance-free and grease-free: No lubrication required, cleaning with clear water sufficient, zero rust.
• High-strength carbon fibers: Non-stretch cables guaranteeing stable tension and optimal energy transmission with every pedal stroke.
• High-performance polyurethane: Flexibility, wear resistance, ozone resistance and climate protection (temperature range: -54°C to +85°C).
• Optimized 11 mm toothed profile: Specifically designed to meet the demands of human propulsion, smooth and silent transmission.
• CenterTrack system: Patented central guide groove that keeps the belt aligned on the sprockets, prevents any derailment.
• Ribbed back: Increased lateral stability, absorption of bending stresses.

Compatibility and Standards

• Exclusive CDX CenterTrack system: Compatible only with Gates CDX CenterTrack sprockets and chainrings. Not interchangeable with CDC/CDX MudPort systems.
• Split frames: Requires a frame with separable or opening rear triangle to allow installation of the closed belt.
• Flexible sizing: Possibility to adjust gear ratios within a range of ±4 teeth while keeping the same belt.
• Gates mobile app: Use of iPhone/Android app for transmission calculations and tension analysis (45-60 Hz for smooth pedaling, 60-75 Hz for sporty/punchy style).

Available Variants

The Gates CDX CenterTrack range offers many length and tooth count variants to fit all frame geometries and drivetrain configurations:

• Variant 108T / 1188 mm (reference 11M-108T-12CT, EAN 4262428334389 — black/black or black/blue)
• Variant 111T / 1221 mm (ref. 11M-111T-12CT)
• Variant 113T / 1243 mm (ref. 11M-113T-12CT)
• Variant 115T / 1265 mm (ref. 11M-115T-12CT)
• Variant 118T / 1298 mm (ref. 11M-118T-12CT)
• Variant 120T / 1320 mm (ref. 11M-120T-12CT)
• Variant 122T / 1342 mm (ref. 11M-122T-12CT)
• Variant 125T / 1375 mm (ref. 11M-125T-12CT)
• Variant 128T / 1408 mm, 130T / 1430 mm, 132T / 1452 mm, 143T / 1573 mm, etc., up to 250T for tandems (8 mm pitch, specific system)

Some variants are available in black/blue or black/red color schemes to customize the bike's aesthetics.

Environmental and Practical Benefits

• Zero oil waste: No grease splashed on frame, clothing, or environment.
• Exceptional longevity: Less frequent replacement than a chain, reduction of metal waste.
• Silent operation: Ideal for discreet urban commutes and nature trails.
• Easy maintenance: Quick cleaning with water spray, immediate drying, zero corrosion.

Target Audience

Designed for long-distance cyclists, touring cyclists, bikepackers, and gravel or MTB riders seeking a reliable, robust, and maintenance-free transmission system. Particularly appreciated on bikes equipped with internal gear hubs (Rohloff, Alfine, Nexus, Pinion, Enviolo) and on high-performance singlespeed/fixie bikes.