KMC 104 BCD 4-Arm Narrow-Wide E-Bike Chainring (38T)

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Price last checked: 07/11/2026

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KMC 104 BCD 4-Arm Narrow-Wide E-Bike Chainring (38T)

The KMC 104 BCD Narrow/Wide E-Bike Chainring is CNC-milled in Europe from high-grade AL7075 T6 aluminium alloy, delivering an exceptional strength-to-weight ratio for e-bike drivetrains. Designed for 4-arm crankset spiders with a 104mm bolt circle diameter, it ensures maximum power transfer efficiency and optimal chain ...
The KMC 104 BCD Narrow/Wide E-Bike Chainring is CNC-milled in Europe from high-grade AL7075 T6 aluminium alloy, delivering an exceptional strength-to-weight ratio for e-bike drivetrains. Designed for 4-arm crankset spiders with a 104mm bolt circle diameter, it ensures maximum power transfer efficiency and optimal chain retention. Its narrow/wide tooth profile ensures excellent chain engagement, and it is fully compatible with KMC’s E1 through E12 e-bike chain range for extended drivetrain life and reduced maintenance. Features Designed for 4-arm cranksets with 104mm BCD (bolt circle diameter) CNC-milled from AL7075 T6 aluminium for precision and durability Manufactured in Europe to the highest tolerances Narrow/wide tooth profile for improved chain retention Maximises efficiency to extend battery range Compatible with KMC E1 / E8 to E12 e-bike chains Chain pitch: 1/2" × 11/128"
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KMC 104 BCD 4-Arm Narrow-Wide E-Bike Chainring (38T)-

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About: KMC

KMC is a renowned brand specializing in bicycle chains and related components. With a history dating back to 1977, KMC has become a trusted name in the cycling industry, known for its high-quality and reliable products. KMC offers a wide range of bicycle chains designed for various cycling disciplines, including road, mountain biking, and BMX. Their chains are renowned for their durability, smooth shifting, and excellent performance. KMC utilizes advanced manufacturing techniques and high-quality materials to create chains that can withstand rigorous riding conditions and deliver optimal power transfer. In addition to chains, KMC also produces chain accessories, such as chain links, quick links, and chain tools, to facilitate easy installation, maintenance, and repair. These accessories are designed with convenience and reliability in mind, allowing cyclists to efficiently work with their chains.

About: Fawkes Cycles

Fawkes Cycles is a UK-based cycling retailer built on a foundation of elite racing experience and a genuine love for the sport. Founded by former professional cyclists Nigel and Mandy—whose achievements include representing Great Britain and winning a world championship—Fawkes Cycles combines expert insight with a strong commitment to customer service. The store offers a wide selection of bikes, parts, and accessories from trusted brands, alongside exclusive deals, discount codes, and convenient services like free UK delivery and click & collect. Whether you're a beginner or a seasoned rider, Fawkes Cycles is a name you can trust for quality, value, and real cycling know-how.

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