If you're looking to upgrade your Brompton C Line bikes, we recommend the MiniMODs X3 Unibody Cog Set:
Unibody Cog Set 11-14-17T
2s-3s shifter upgrade kit for stock lefthand shifter
long bushing kit
Upgrade to a 15-speed setup with this cog set, which includes a shifter 2s-3s upgrade kit compatible with Brompton's stock left-side 2-speed shifter (fits shifters manufactured after 2019).
For your convenience, we have also put together a great 10-speed or 15-speed solution kit to use with our X3 Unibody Cog Set. This comprehensive and affordable package is compatible with all C Line models and includes everything you need for a seamless upgrade to enhance your ride.
This is the best choice for Brompton enthusiasts who want to maintain the original style. Once the upgrade is completed, the appearance is indistinguishable from the original BWR or BSR hubs, but you would have a 5-speed rear hub for both climbs and riding fast.
Package Contents:
Hubsmith IG28 Wheelset:
Front Wheel: Fully laced for optimal performance and stability.
Rear Wheel: Not laced, 28 Holes, designed for easy integration with the included Sturmey Archer SRF-5 5-speed internal gear hub. (Includes rim, spokes, and nipples.)
Sturmey Archer SRF-5 5-Speed Internal Gear Hub:
(1) Sturmey Archer 5-speed shifter(2) 13t sprocket (x1)(3) 16t sprocket (x1)
Key Features:
Hubsmith IG28 Wheelset(no rear hub version): The front wheel is laced to ensure robust performance, while the rear wheel comes un-laced for convenient pairing with the Sturmey Archer SRF-5 5-speed internal gear hub. This setup provides flexibility for custom installations and upgrades.
Sturmey Archer SRF-5 5-Speed Internal Gear Hub: This high-quality hub (which is now rarely available as production has been discontinued) is designed to work seamlessly with the rear wheel, allowing you to upgrade to a 10-speed setup. Note that a 2-speed shifter is required and sold separately.
Alternatively, you can use the MiniMODs X3 Unibody Cog Set (11-14-17t included) and upgrade the stock left-hand 2-speed shifter mechanism to the 3-speed mechanism (also included), for a 15-speed setup. You'll need to purchase a standard 11-speed chain to use for the X3.
Important Note:
While we pride ourselves on smooth, functional and innovative mods, these upgrades require experience and skills in parts assembly. If you encounter difficulties, please seek help from an experienced local bicycle shop.
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