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Forks

The fork is where your bike's handling character is set — it determines steering responsiveness, front-end stability, and on a mountain bike, how much the trail can throw at you before the front end gives up. Forks at RA Cycles spans suspension and rigid options: a deep selection of mountain bike forks from RockShox and FOX covering cross-country through downhill travel ranges, alongside road and triathlon carbon forks for frame replacements or custom builds, and service parts and upgrade kits for RockShox suspension.

The mountain fork range runs from the RockShox SID and SID SL (XC-focused, with Flight Attendant wireless electronic versions available), through trail forks like the Lyrik and FOX Float 38, up to enduro and downhill options including the RockShox Zeb and FOX Float 40. Road and triathlon options cover aftermarket forks from ENVE and frame-matched replacements from Cervelo and Argon 18.

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Forks

Mountain bike fork selection starts with travel — the amount the fork can compress. Cross-country forks run 80–120mm for minimal weight penalty on fast-rolling terrain; trail forks at 130–150mm balance versatility with capability; enduro forks at 160–180mm prioritize control on aggressive terrain; downhill forks at 200mm are built for bike parks and gravity racing. Axle standard (15mm through-axle Boost is most common) and wheel size (29" or 27.5") need to match your frame. Damper quality is the other key variable — RockShox's Charger 3.1 damper, found in the Lyrik Ultimate and SID Ultimate, delivers independent high- and low-speed compression adjustment for technical terrain, while the Flight Attendant system adds wireless electronic control that automatically adapts to changing trail conditions in real time.

Road and triathlon forks in this collection are primarily frame-specific replacements — Cervelo's Soloist and Caledonia-5 forks match those framesets precisely, while the Argon 18 E-117 tri fork fits that triathlon platform. The ENVE Road Disc Fork is an aftermarket option for custom builds requiring a high-performance carbon fork with disc brake routing. Service and upgrade parts cover a range of RockShox maintenance needs: SKF dust seals and foam rings for fork rebuilds, DebonAir air spring kits for improved small-bump sensitivity, and Charger 2.1 damper upgrade kits for bringing older RockShox forks closer to current-generation performance.

Shop related categories including mountain bikes, suspension, bike frames, and bike components.

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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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