Our BBInfinite SRAM DUB English/BSA Threaded External Cup MTB Bottom Bracket System work with any DUB MTB (29mm) crank set on the market. This includes DUB, DUB WIDE, DUB SB+, DUB Ai and FAT. Weighing in at a skimpy 68 grams for the set, the Ultra-lite DUB bottom bracket delivers smooth, quiet, durable performance in an ultra-compact form factor that allows maximum clearance for power meter back plates. Installs with common socket-style, 16-notch tools such as the classic Shimano TL-FC33, Park Tools BBT-69.2, and many others.
Q: Why is there an Integrated Spindle Protector option? A: Some frames have extremely restrictive bottom bracket shells that get so narrow in the middle that there is barely clearance for a 30mm spindle. A frame of this type will NOT admit our integrated spindle protector. If the frame is wide open inside, chose the "With" option. If your frame narrows inside, chose the "Without" option.
ATTENTION: Always "chase and face" your frame bottom bracket shell before installation. Threads must be absolutely clean and clear of debris. Frame bottom bracket shell must be faced to 73mm or 100mm depending on frame BB shell width.
This threaded bottom bracket features alloy cups that are MilSpec MIL-A-8625 Type II anodized for extreme durability. Polymer labyrinth seal bearing covers with integrated bushings keep out dirt and debris while isolating the steel bearing races from the steel spindle, halting creaks, corrosion, and accelerated wear of the crank spindle itself. The external cup bottom bracket installs with common socket-style, 16-notch tools such as the classic Shimano TL-FC33, Park Tools BBT-69.2, and many others. Take a look at this threaded GXP bottom bracket cup for road bikes for an option that is compatible with Sram, Cobb, and Quarg cranksets.
16-Notch Socket Cup
Installation made easy ♥
Fits ALL 16-notch 44mm OD cups.
Compatible with ALL BBInfinite Threaded Bottom Brackets: Shimano, Gxp, 30mm, DUB, and M30.
Fits 16-notch rotor disc lockrings
Made in the USA
ABOUT OUR BEARING CHOICES:
Ceramitech Bearings: Our Si3n4 hybrid ceramic bearings feature ultra-spherical silicon nitride balls matched to SAE 52100 chrome steel bearing races that have been processed with additional heat treatment and polishing steps. The result is a hybrid-ceramic bearing that lasts longer than any steel bearing with spin performance no steel bearing can rival. We’re so confident in the durability of our Ceramitech bearings that we back them with a Lifetime Bearing Exchange warranty. These bearings feature mid-contact seals for extreme performance and endurance. Each bearing comes lubricated with Kluber Isoflex Topas NB52. Lifetime Warranty.
WS2 Coated Ceramitech Bearings: We took our amazing Ceramitech bearings and added an extremely durable, tungsten disulfide (WS2) coating that has a 0.03 coefficient of friction---which means it’s slicker than Teflon, graphite, and even molybdenum disulfide. WS2 has an affinity for oils and greases, which means it maintains a hydrodynamic layer of lubricant where it’s needed most. The result is astonishing spin performance and increased endurance. These bearings feature mid-contact seals for extreme performance and durability. Each bearing comes lubricated with Kluber Isoflex Topas NB52. Lifetime Warranty.
ABEC-7 Steel Bearings: Crafted from SAE 52100 chrome steel, our BBInfinite ABEC-7 (ISO 492, Class 4) bearings are so buttery that you’d have to buy our Ceramitechs to find anything better. These bearings feature mid-contact seals for extreme performance and durability. Each bearing comes lubricated with Kluber or Koyo. 1-Year Bearing Exchange Warranty.
SRAM DUB Compatibility Chart
WS2: 74g | CERAMITECH: 76g | ABEC-7 SS: 79g
Frame Width: BSA 73mm English
Frame Width: BSA 100mm English
Frame Diameter: 1.37 x 24tpi English
Spindle Diameter: DUB
Bearing Size: 4030
Ceramitech 4030 | ABEC-7 4030