The Gates CDN S150 crankset embodies the ideal solution for transforming your urban bike into a silent, reliable, and maintenance-free machine. Designed around the revolutionary Gates Carbon Drive CDN technology, this ready-to-use crankset combines forged aluminum crank arms and a pre-mounted 50-tooth composite chainring for quick installation and optimal belt drive transmission in all conditions.

Technical Overview

The Gates CDN (CenterTrack) system represents the accessible entry-level of the Carbon Drive range, while relying on the same proven carbon fiber-based technology. This S150 crankset is designed for urban cyclists, users of electric bikes with front motors or rear hub motors, and all those seeking a clean, durable, and virtually silent transmission system. With its 170 mm crank arms in matte black anodized 6061 aluminum and its high-strength composite chainring featuring the CenterTrack center groove, this set offers optimal belt alignment and minimizes tension variations thanks to precision concentric mounting.

Technical Highlights

• Gates CDN CenterTrack System: Central guide groove that keeps the belt perfectly aligned, ensuring smooth transmission and maximum system longevity.
• Pre-mounted composite chainring: Made from high-tech impact-resistant plastic, the 50-tooth chainring is already factory-installed — a considerable time-saver during installation.
• Cold-forged aluminum crank arms: AL6061 material offering excellent weight-to-stiffness ratio, with matte black anodized finish for increased corrosion resistance.
• JIS square taper interface: Compatible with standard JIS square taper bottom brackets (e.g., Shimano BB-UN300, Thun Zumba), BSA 68 mm shell width.
• BCD 130 mm, 5-bolt: Proven standard ensuring solid chainring attachment and facilitating replacement if necessary.
• Controlled weight: Only 697 grams for the complete crankset + chainring, contributing to lightening the bike compared to traditional steel chain systems.
• 11 mm belt pitch: Compatible with the entire range of Gates CDN belts, for maximum versatility.

Use and Compatibility

This crankset has been specially developed for urban bikes and city bikes subjected to intensive daily use: outdoor parking, varied weather conditions, home-to-work commutes. It excels in environments where reliability and low maintenance are essential. The CDN system is also compatible with e-bikes equipped with front motors or rear hubs, but is not recommended for mountain bikes, intensive trekking bikes, or e-bikes with mid-drive motors (high torque).

Geometry and Standards

Crank arm length of 170 mm, suitable for the majority of urban cyclists and offering a good compromise between torque and pedaling smoothness. The 50-tooth chainring provides a versatile intermediate gear ratio, ideal for hilly urban routes and mixed flat/hill commutes. The final belt line depends on the chosen hub gear (Shimano Nexus, Alfine, Rohloff, etc.), allowing customization according to your needs.

Installation and Contents

Delivered with 2 crank arm fixing bolts, pre-installed CDN 50T chainring with its CenterTrack groove, and compatible with standard JIS bottom brackets (not included). Installation is simple and quick thanks to the pre-mounted chainring: just screw the crank arms onto the bottom bracket spindle, tension the belt, and ride.

Available Variants

• Variant 46T, 170 mm: EAN 4262428334723 — Ref. FC S150 JIS 170 BLACK 46T CDN — easier gear ratio, ideal for very hilly areas or electric assistance.
• Variant 55T, 170 mm: EAN 4260689330256 — Ref. FC S150 JIS 170 BLACK 55T CDN — higher gear ratio, for sporty cyclists or flat routes.
• Variant 46T, 175 mm: EAN 4262428334693 — Ref. FC S150 JIS 175 BLACK 46T CDN — long crank arms, increased torque.
• Variant 50T, 175 mm: EAN 4262428335003 — Ref. FC S150 JIS 175 BLACK 50T CDN — 175 mm length with intermediate gear ratio.

All variants share the same manufacturing quality, the same CenterTrack system, and the same JIS compatibility. The choice depends on your morphology (crank arm length) and your use (number of chainring teeth).

Advantages of the Gates Carbon Drive CDN System

• Absolute silence: No more metallic clicking — the carbon belt runs silently, for incomparable acoustic comfort.
• Total cleanliness: No grease, no dirt on clothes or hands. The transmission stays clean even in rain.
• Exceptional durability: Gates belts display a lifespan 2 to 3 times greater than traditional chains, with remarkable wear resistance.
• Minimal maintenance: No lubrication, no tedious cleaning. A simple occasional wash with soapy water is sufficient.
• Energy efficiency: Belt drive transmission ensures optimal performance with reduced friction losses.