With SRAM now pushing the DUB bottom bracket spindle standard to road, too, BBinfinite decided it was time to create a full line of their one-piece, perfectly-aligned bottom brackets to go with them. Quick background: BBinfinite’s unique one-piece BB unit places the bearings inside a single shell, allowing them to perfectly align them. Contrast that with individual press-in cups or even thread together BB’s where there is opportunity for misalignment (although, granted, it’s greatly diminished with the thread-together options), and you end up with a BB that keeps the bearings lined up in perfect parallel. The result is a bottom bracket that’s ultra smooth, even with standard steel bearings and races, and has better durability because the bearings aren’t subjected to off-axis loads, turn after turn.
For the DUB collection, they created a polymer insert to size their 30mm ID ABEC-7 steel and Ceramitech bearings down to 29mm for the DUB spindles. This eliminates any metal-on-metal contact, which they say further reduces any chance of noise and prevents any long-term galling of the spindle. They say the design is so solid that they offer the industry’s only lifetime bearing exchange warranty, ceramic included. DUB BB’s are available for:
- PF30 road and mountain
- OSBB PressFit road and mountain
They also offer a threaded version for standard English threaded BB shells where a press-thru design like their one-piece BB’s won’t work. Italian threaded, PF30A, and BB30/BB30A are coming soon. Prices start at $170 for ABEC-7 versions and $225 for Ceramitech. Threaded DUB products are $110/$165.