JUST THE FACTS:

OUR BB30A DUB or 30mm Spindle Bottom Bracket Module fits: Any frame bottom bracket shell that is 73mm wide, for use with any road DUB or 30mm spindle crank. 30mm cranks vary in length so check with us or the crank manufacturer to find out which spindle spacer combo is right for you. Minimum spindle length for 30mm cranks is 102mm. Older "short" spindle BB30A cranks require the use of our classic BB30A for 30mm.

We’ve eradicated the dreaded BB30A spindle length CREAKS once and for all by eliminating the problematic bearing-direct-in-frame set up that has always been BB30’s downfall. Bike manufacturers are not able to hold the precise tolerances necessary to fit bearings into frames properly, resulting in poor performance, short bearing life, and the noises that let you know the bearings are dying with each pedal stroke. By completely replacing this flawed set up with our 1-piece system the frame is no longer in the equation and you will at last enjoy the benefits of silence, durability, and buttery smooth power delivery that many thought impossible with a BB30A-type DUB bottom bracket system. Don’t settle for good-as-new when you can have better-than-ever with a BBInfinite bottom bracket.

Our BB30A DUB asymmetrical bottom bracket systems ship with the special press tools and retaining compounds you'll need. All you need is the press, such as a ParkTools HHP-2 or 3, or our own Master Tool Press which can be found here..

Why would I choose a 2-Piece bottom bracket system?

Our 2-Piece Asymmetrical Bottom Bracket system is for any bike that cannot accommodate our 1-piece unit. What would cause this? Easy; any obstruction that cannot be removed which prevents our 1-piece module from passing from one side to the other in a straight line through the frame bottom bracket shell, which includes:

1) The presence of a hydraulic line that cannot be moved out of the way.

2) An immovable fixture, hump, frame feature, or cable guide.

3) Any wires that cannot be moved out of the way entirely.

Over 90% of the bikes out there can use a 1-Piece module. If you are unsure please email us with the year, make, and model of your frame, along with the crank set model and type, at info@bbinfinite.com, and we’ll get you sorted.

OUR BB30A DUB 2-PIECE SYSTEM FITS: Any frame bottom bracket shell that is 73mm wide asymmetrical, for use with any road DUB crank.

We’ve discovered how to fix a creaking BB30 bottom bracket once and for all by eliminating the problematic bearing-direct-in-frame set up that has always been BB30A’s downfall. Bike manufacturers are not able to hold the precise tolerances necessary to fit bearings into frames properly, resulting in poor performance, short bearing life, and the noises that let you know the bearings are dying with each pedal stroke. By completely replacing this flawed set up with our 2-piece BB 73mm bottom brackets for sale the frame is no longer in the equation and you will at last enjoy the benefits of silence, durability, and buttery smooth power delivery that many thought impossible with a BB30-type system. Don’t settle for good-as-new when you can have better-than-ever with a BBInfinite bottom bracket.

Our BB30A 2-piece Systems ship with the special press tools and retaining compounds you'll need. All you need is the press, such as a ParkTools HHP-2 or 3, or our own Master Tool Press.

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 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.

MORE THAN EXTREME SPEED AND SILENCE:

BBInfinite 73mm bottom brackets for DUB crank sets maintain optimal chain-lines for crisp, consistent shifting and drivetrain performance while dishing out trouble-free mile after trouble-free mile. From the gorgeous, high-luster of our TypeII MilSpec hard anodized finish to the sculpted lines of our 2-Piece design that unitizes the bottom bracket structure to eliminate all potential creaks before they start, every aspect of our architecture fuses beauty with durability and performance.

Our DUB spindle optimized design is set to the widest stance the crank set allows while ensuring that interfaces between crank arm splines and spindle splines have maximum engagement and Q-factor is set as narrow as possible.

POWER METER FRIENDLY

All BBInfinite bottom brackets for sale for DUB spindle crank sets are 100% compatible with all crank-based power meters.

WHY DO BBINFINITE 2-PIECE BOTTOM BRACKETS SPIN LIKE CRAZY?:

The star of our BB's is the bearing itself. Our Ceramitech bearings feature Si3n4 (Silicon Nitride) balls running in heat treated chrome-steel races that go through a 3-step polishing process to ensure smooth running, durability, and mind-boggling spin performance. Our ABEC-7 all steel bearings feature hardened chrome-steel balls and races for high performance on a budget.

Over-compression of the outer bearing race post-installation is the leading cause of diminished spin performance of pressfit BB’s.To prevent this, all BBInfinite 2-Piece bottom brackets feature our patented Reverse Half Grip bearing retention system, which channels external compression forces away from the center-line of the bearing, thereby letting the balls rotate freely. In fact, a mild over-compression condition will boost performance of our Reverse Half Grip design.

WHAT KEEPS BBINFINITE BOTTOM BRACKETS FROM CREAKING?

Precise machining and modern chemistry combine to ensure every ride will remain creak-free mile after mile, year after year. Our precision allows us to create a cup-set that will match your frame while compensating for frame irregularities while VibraTite530 locks the cups in securely, yet allowing for easy removal when that day comes.

SRAM DUB Compatibility Chart