The Comprehensive Alegro Cycles Guide to Sram DUB
The DUB system is designed so that one crankset fits almost every frame. You simply match the bottom bracket to your bike's specific "shell" dimensions.
| If your frame has... | Shell Diameter | Shell Width | You need this DUB BB | Common on these bikes |
| Internal Threads | 34.8mm | 68/73mm | DUB BSA | Specialized, Brodie, Santa Cruz, Newer Cannondale, Older Road/MTB |
| Large Internal Threads | 47mm | 68/86/73mm | DUB T47 | New Winspace, Trek, Specialized (Aethos/Crux), Factor |
| Smooth Shell (Standard) | 41mm | 86.5/92mm | DUB PressFit (PF86/92) | Giant, BMC, Scott, Cube |
| Smooth Shell (Narrow) | 42mm | 68/73mm | DUB BB30 | Cannondale, Specialized (some models) |
| Smooth Shell (Wide) | 46mm | 68/73mm | DUB PF30 | Cervélo, Ibis, Niner |
| Smooth Shell (Oversized) | 46mm | 86.5mm | DUB BB386 | Wilier, Factor, 3T, Orbea |
Quick Identification Tips
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The Threaded Rule: If the shell has threads, it is either BSA (standard size) or T47 (noticeably larger diameter).
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The BB386 Identifier: If your frame is non-threaded (smooth) and the shell is very wide (86.5mm) but has the large 46mm opening of a PF30, it is BB386EVO.
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Spindle Specificity: Remember that DUB uses a 28.99mm spindle, so these bottom brackets are not compatible with 24mm (Shimano) or standard 30mm (FSA/Rotor) cranksets.
Alegro Service Note
Proper installation is the key to a silent drivetrain. Always refer to the Sram spacer chart, as the number of spacers required on the drive and non-drive sides changes significantly depending on whether you are installing into a 68mm, 73mm, or 86.5mm shell...or book your service here!