Description

KMC 104BCD MTB Chainring – Narrow-Wide – 32T / 34T / 36T – Black or Aurora

Upgrade or replace your MTB chainring with a KMC 104BCD Narrow-Wide Chainring, designed for 4-arm crankset spiders using a 104mm BCD. Manufactured from high-strength AL7075-T6 CNC-machined aluminium, this chainring combines low weight, durability and excellent chain retention for modern 9, 10, 11 and 12-speed MTB drivetrains.

The Narrow-Wide tooth profile alternates tooth widths to closely match the inner and outer plates of the chain, helping to keep the chain securely engaged while also providing improved mud clearance. This makes it particularly well suited to mountain biking and off-road riding where chain retention is important.

Key Features

• Brand: KMC
• Type: MTB Chainring
• BCD: 104mm
• Crank Compatibility: 4-arm / 4-bolt 104BCD spiders
• Speeds: Compatible with 9, 10, 11 and 12-speed drivetrains
• Available Sizes: 32T, 34T and 36T
• Tooth Profile: Narrow-Wide for improved chain retention
• Material: CNC-machined AL7075-T6 aluminium
• Excellent chain retention for demanding MTB use
• Optimised mud clearance
• Designed for precise interaction between chain and chainring
• Compatible with KMC chains
• Compatible with chains measuring 1/2″ x 11/128″
• Not compatible with SRAM T-Type chains
• Colours: Black or Aurora

Available Sizes

Important Compatibility Information

This chainring is designed specifically for 104mm BCD 4-arm crankset spiders. Please check your existing crankset before ordering to ensure it uses a 104mm BCD mounting pattern.

The chainring is compatible with 1/2″ x 11/128″ chains, including suitable KMC and other compatible 9–12-speed chains. SRAM Eagle T-Type chains are not compatible with this chainring.

Why Choose KMC?

KMC has extensive experience in bicycle drivetrain components, with its chainrings designed to work reliably alongside modern bicycle chains. The combination of AL7075-T6 aluminium construction, CNC machining and Narrow-Wide tooth technology provides a strong and lightweight solution for MTB riders looking for dependable chain retention.

Why Buy from Hopkinson Cycles?

Hopkinson Cycles is a UK family-run bicycle business with years of experience supplying cycle components, accessories and workshop parts to cyclists across the UK. We stock a wide range of genuine cycling products and aim to offer competitive prices, fast dispatch and knowledgeable customer service.

Please select your required tooth size and colour from the available options before ordering.