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KMC Silver/Black X12 Chain 128L E-Bike

Key Features

12-Speed Precision Engineering
Optimized inner and outer plate design specifically for 12-speed drivetrains, ensuring flawless shifting performance across the entire cassette range.

Classic Silver/Black Finish
Timeless two-tone aesthetic with durable silver and black plating that provides corrosion resistance while complementing traditional and modern builds alike.

128-Link Extra Length for E-Bikes
Extended link count specifically accommodates e-bikes, tandem setups, extreme full-suspension designs, and the longest chainstay configurations without requiring additional links.

Universal 12-Speed Compatibility
Works seamlessly with Shimano, SRAM, and Campagnolo 12-speed road and MTB systems for maximum versatility across brands.

Enhanced Durability for High-Torque Applications
Advanced surface treatment and precision manufacturing deliver extended wear life under e-bike torque loads, reduced friction, and consistent performance in all riding conditions.

Brand: KMC

Type: 12 Speed

Availability: In stock Out of stock

Delivery: 2-3 working days

Product variants

Regular price: £31.89
Sale price: £31.89
Regular price
Unit price: per

Quantity

Description

Silver/Black X12 Chain 128L

This 12 speed KMC chain is high performing and extremely durable. It works perfectly on all standard bikes but is also designed for E-bike use, working efficiently under the stress and loads that E-bikes put on the drivetrain.

The Non-Directional design makes it independent of direction which allows maximum compatibility on MTB or Race bikes. With its unique stretch-proof treatment, the durability has been enhanced massively by reducing the attrition between the inner plates and pin. As a result, chain life has been significantly prolonged. The upper bridge forms a slant vault parallel to the tip of tooth movement. This vault shape makes the tooth and chain engage much more precisely.

Features:

Includes non-reusable 12x Missing Link
Size: 1/2" x 11/128"
Pin length: 5.2mm
Double X Durability
Non-directional
Compatible with all 12x drivetrains (except SRAM Eagle Transmission T-Type, 12-speed road/gravel)

Weight: 272g (110 links)

Shipping & Returns

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Same‑Day Dispatch

Orders placed before 2pm are dispatched the same day via Royal Mail Tracked 24.

If there are any stock issues, we will contact you by phone or email to update you and reorganise delivery.

Shipping Costs

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• Orders under £50 have a flat delivery fee of £3.00.

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FAQ

Q: Is this chain compatible with my 12-speed drivetrain?
A: Yes, the KMC X12 works with all major 12-speed systems including Shimano, SRAM, and Campagnolo for both road and mountain bikes.

Q: Why would I need 128 links instead of 126?
A: The 128-link version is designed for e-bikes, tandem bikes, extreme full-suspension setups, and bikes with very long chainstays. If you have a standard bike, the 126-link version is usually sufficient.

Q: Can this chain handle e-bike torque?
A: Yes, KMC X12 chains are built to withstand the higher torque loads generated by e-bike motors while maintaining smooth shifting and durability.

Q: How often should I replace my chain?
A: Chain replacement depends on riding conditions and maintenance. Use a chain checker tool regularly - replace when wear reaches 0.5% for 12-speed systems to prevent drivetrain damage. E-bike riders may need more frequent replacement due to higher torque.

Q: Do I need special tools to install this chain?
A: You'll need a chain tool compatible with 12-speed chains. KMC chains typically use a master link (sold separately or included depending on version) for easier installation and removal.