Cervelo changed their hanger design between the 2011 and 2012 model years, which means ordering the wrong part is easy if you're not paying attention to production dates. The Derailleur Hanger 156 from Wheels Manufacturing fits 2011 Cervelo road frames exclusively—R3, R5, R5CA, RS, and S5 from that single model year. If your frame is a 2012 or later, this isn't the right hanger. That compatibility distinction matters because a mismatched hanger either won't mount correctly or will position the derailleur at the wrong angle, creating shifting problems that no amount of cable tension adjustment will fix.

Wheels Manufacturing machines this hanger from 6061 aluminum at their Colorado facility, holding tolerances tight enough to match the original equipment geometry. The profile positions your rear derailleur at the same angle as the factory hanger, so shifting performance returns to where it was before the original bent or broke. Black anodizing protects the aluminum from corrosion and keeps the appearance consistent with the stock component. Two M3x8 flat head screws secure the hanger to the dropout from the derailleur side, and both fasteners come included in the package.

Frames from 2011 are now well into their second decade of service, which makes replacement hangers harder to source through official channels. Cervelo may or may not still stock this specific part, and even if they do, waiting for shipment can sideline your bike for longer than you'd like. Having a spare on hand—whether in your home tool drawer or your travel kit—means a bent hanger doesn't end your riding until a replacement arrives. The cost of keeping one in reserve is minimal compared to the frustration of a bike you can't ride.... Read More