Built to handle the rigours of mountain bike riding, the Box One Prime 9 Speed Rear Derailleur offers smooth and consistent operation on every off-road adventure.
This Box One rear mech takes the advantages of legacy 9 speed drive-trains but also adds the advancements of modern 1 by drive-trains. It features a fully adjustable Tri-Pack Clutch, Forged Construction as well as optimisation for an 11-50t cassette. This allows it to step up to the durability and performance of an unparalleled level that's suited for the most demanding terrain.
• Box One Prime 9 11-50T Cassette Black
• Box Two Prime 9 11-50T Cassette Black
• Box Three Prime 9 11-50T Cassette Black
• Box One Prime 9 Chain 126L DLC Black
• Box Two Prime 9 126 Link Chain Nickel
• Box Three Prime 9 126 Link Chain Polished
• Box One Prime 9 Shifter Black
• Box Two Prime 9 Shifter Black
• Box Three Prime 9 Shifter Black
Are Box Prime 9 derailleurs compatible with Shimano "direct mount" hangers? No, Shimano direct mount hangers are proprietary and are not compatible with Box derailleurs.
Is the Box One Prime 9 Derailleur compatible with other 9 speed components? No, traditional 9 speed systems use a Cable Pull that is not compatible with Prime 9.
Are Box Prime 9 derailleurs compatible with drop bar (road) shifters? No, Box Prime 9 derailleurs are not currently compatible with drop bar shifters, but we do offer a clamp for our shifters to mount on some 31.8mm drop handle bars.
How should I clean my Box One Prime 9 derailleur? We suggest removing the derailleur from the bike and using a soft bristle brush or rag with soapy water or a mild de-greaser. We do not recommend pressure washing, strong solvents or de-greasers as they could degrade the surface coating.
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Goods are shipped from the UK. Does not include delivery charges, local taxes or import duties, if applicable.
More information on International delivery options
We will happily refund any item purchased on Wiggle if returned to us within 365 days; excluding Wiggle gift vouchers, nutrition and customised products, except when faulty.
Please note: Bikes and other bulky items cannot be returned using our local returns service (where applicable). Please contact us and we can arrange to collect these from you using our discounted courier rates. There is a fee for all collections, except for faulty products.Returned goods must be unused and supplied with their original packaging, unless the goods are faulty. Wiggle will pay the return postage costs for any faulty items.
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