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Frame Specific Parts / Derailleur Hangers

Some parts only fit one bike. The derailleur hanger that threads into a Pinarello Dogma F won’t fit a Scott, and the rear shock spec’d for a FOX DHX Factory Trunnion mount won’t bolt into a non-trunnion frame. This collection exists for exactly that situation: frame-specific parts and derailleur hangers for riders who know what they need and need it to fit correctly. The range covers replacement derailleur hangers for dozens of frame brands and models, frame-specific seatposts including proprietary shapes from Pinarello and others, rear shocks from FOX matched to specific frame linkage specs, and a variety of other components tied to individual frame designs. If you’re rebuilding, maintaining, or upgrading a specific bike, this is where the fit-critical parts live.
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About Frame-Specific Parts & Derailleur Hangers

Derailleur hangers are the most frequently needed frame-specific part in cycling — they’re designed as a sacrificial component, built to break on a crash or impact before the derailleur or frame does. Because every manufacturer designs their dropout geometry differently, hangers are not interchangeable across brands or even model years. The same applies to proprietary seatposts: many high-end frames use non-standard tube diameters, shapes, or offset specs that require the exact post designed for that platform. Rear shocks are similarly frame-dependent — trunnion vs. standard mounting, eye-to-eye length, and stroke measurement must all match the frame’s spec precisely or the shock simply won’t install.

This collection brings together 185+ frame-specific parts across several categories. FOX Float X and DHX Factory rear shocks cover suspension replacements and upgrades for compatible full-suspension frames. Pinarello’s proprietary seatposts span the Dogma F, F8, F10, and F12 platforms in multiple setback and finish options. Derailleur hangers cover dozens of brands including Pinarello, Scott, Colnago, Cervelo, and more. If the specific part you need isn’t in the catalog, the RA Cycles team can assist with sourcing.

For broader component shopping, explore seatposts, suspension, and derailleurs at RA Cycles.

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R&A Cycles - 50th Anniversary

50 YEARS AND COUNTING

From a Brooklyn storefront to flagships in Walnut Creek and Miami, from handwritten mail orders to a fully digital custom bike builder — RA Cycles has spent half a century doing one thing: serving riders who demand the best. That half-century belongs as much to you as it does to us. The riders who kept coming back, who sent their friends, who trusted us with bikes that matter — you're the reason we're still here. Here's to the next fifty.

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