Brother Cycles Big Bro Rohloff Dropouts
Brother Cycles Big Bro Rohloff Dropouts
- 4.9 from 782 Google reviews
- Independent Bike Dealer of the Year 2025, BikeBiz Awards
- UK delivery from £4.99, or free collection from our Bow shop at E3 3XS.
- Checked by our team before it leaves us
Collecting instead? Email us or message us on WhatsApp before you visit, so we can have it ready for you.
Sliding dropout plates that convert a Boost Big Bro to 135mm for a Rohloff Speedhub.
These plates convert the Big Bro's rear spacing from Boost 148mm to 135mm, so you can fit a Rohloff Speedhub with a 10mm axle and the OEM axle plate. They may also suit other internally geared hubs. Version 1 is for Big Bros up to 2024, Version 2 is for the rail dropouts on 2025 and newer frames. Neither fits the older non-Boost Big Bro (before 2021).
Why we stock it:
- Rohloff ready: 135mm spacing with OEM axle plate
- Two versions: for pre-2025 and 2025 rail dropouts
- Complete: bolts, washers and ISO disc mount included
Specification
- Converts Boost 148mm to 135mm
- Rohloff Speedhub with 10mm axle and OEM axle plate
- ISO disc brake mount
- Mounting bolts and washers included
- Version 1: Big Bro 2024 and earlier (Boost)
- Version 2: Big Bro 2025 and newer (rail dropouts)
Ideal for: Big Bro owners building a Rohloff expedition bike.
Not sure which version fits your frame? Bring the bike to our workshop in Bow and we will check it and fit it for you. See the full Brother Cycles range or book a fitting with our workshop.