Firefly Bicycles Released Modernized Rim-Brake Frame
The Boston-based builder launched a custom titanium frame capable of clearing 40mm tires.
Updated on Sept. 25, 2026 in Cycling
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Firefly Bicycles has introduced a custom titanium frame that merges traditional rim-brake performance with modern tire clearance. The new design accommodates tires up to 40mm, significantly wider than the 23mm standards common on older road bikes.
Why it matters
This build was created to explore how a modern rim-brake bike would function with contemporary geometry and component compatibility. It offers a niche alternative for cyclists who prefer rim-brake systems but require the increased traction and comfort provided by modern wide-tire setups.
The frame features 3D-printed titanium components, including chainstay yokes, seat tube knuckles, and a through-bolt dropout system. It provides 40mm of tire clearance and maintains compatibility with Shimano Di2, Campagnolo mechanical, and SRAM AXS shifting systems.
The players
Firefly Bicycles
A Boston-based boutique manufacturer specializing in custom-built titanium bicycle frames.
Cane Creek
A cycling component manufacturer that produces the high-performance eeBrakes used in this build.
The details
The design utilizes a custom cable-pull variation of Cane Creek eeBrakes and a fork with a 3D-printed titanium crown to achieve its unique aesthetic and mechanical requirements. By replacing standard quick-release skewers with a through-bolt dropout system and brass fittings, the builders achieved a functional rim-brake setup capable of handling modern terrain.
Timeline
Firefly Bicycles debuted the new model on September 25, 2026.
Season Trajectory
This release highlights a divergence in the high-end cycling market where builders are increasingly prioritizing custom versatility over pure aerodynamic standards. It signals that even as the industry shifts toward disc brakes, demand remains for refined, high-clearance titanium frames.
Interested buyers can expect entry-level pricing for the frame and fork package to start at $7,200. The design enables riders to utilize wider tire profiles while maintaining the specific brake-lever feel associated with rim-pull systems.
The takeaway
This project proves that rim brakes can still be viable for modern, wide-tire riding with the use of additive manufacturing. Enthusiasts should consider if the cost of custom titanium justifies the aesthetic preference for rim brakes over widely available disc-brake alternatives.
Further reading
For more news on the local bicycle manufacturing scene, see Cycling.
Source note: This article includes information reported by Velo.
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Would you choose traditional rim brakes over disc brakes for a new road bike build?
