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- Rear Hubs
- Industry Nine
- QR x 135 mm
- 6-Bolt Disc
Industry Nine QR x 135 mm 6-Bolt Disc Bicycle Rear Hubs
About Industry Nine - "Industry Nine hubs are handmade in Asheville, NC"
This is hub spacing and is the width of the hub. It must match your frame specifications.
This should correspond to the type of brakes you have on the bike.