The BB30 bottom bracket allows you to pair 30mm spindle cranks to 42mm inner diameter bottom bracket shells. Cannondale pioneered this standard along with specially-designed cranks and many have found the benefits to them. Road versions have a 68mm width, MTB has 73mm.
What type of bottom bracket is a BB30?
BB30-named for its required spindle size-narrows Q-factor, increases ankle clearance, and ups bearing durability. Along with a 30 mm spindle, it requires an oversized 68mm or 73mm bottom bracket shell and PressFit bearings held in place by snap rings.
What cranks work with BB30?
BB30-compatible cranks that feature axle spacers on the non-driveside (such as from Cannondale and SRAM) will work just fine because all you'll have to do is remove spacers as needed to accommodate the extra width, but BB30 cranks without such spacers (such as from FSA and Specialized) won't work.
Can I fit a BB30 bottom bracket?
BB30 fits into a 42mm shell—a shell with an internal diameter of 42mm. PF30 bearings fit into bb shells with an internal diameter of 46mm.
How does a BB30 bottom bracket work?
BB30 bottom brackets have been used frequently since 2006. The spindle always has a diameter of 30mm. This ensures a low weight and lots of stiffness. The bearings in the bottom bracket shells are pressed directly into the carbon or aluminum of the bottom bracket.
30 related questions foundWhat is BB30 standard?
The term BB30 was an early term in the history of this standard and refers to the 30mm diameter of the spindle used at that time. However, bottom bracket bearings are available in this standard for 28.99mm, 24mm and 22/24mm spindle systems.
What bearing is BB30?
BB30 bottom bracket systems have very large bearings that press straight into the frame. They've been followed by the Shimano Press-Fit system, loosely referred to as BB86 or BB92, and both appear on a wide variety of both road and mountain bikes.
What is BB30 crank?
The BB30 bottom bracket shell is typically 68mm (road) or 73mm (mtb) wide with an inside diameter of 42mm. Originally the BB30 system was designed to use 30mm diameter crank spindles. However, frame's with BB30 shells can be used many other sized crank spindles.
Why does my BB30 creak?
The leading cause of BB30 bottom bracket creaking is bearing migration within the frame bb shell during use. The bearings shift around a minute amount, resulting in the dreaded creaking sounds. Typically somebody greases the bearings to fix it. This only masks the problem, or more often, exacerbates the problem.
Does Shimano make a BB30 crankset?
Leave it to Wheels Manufacturing to come up with a nicely executed solution. Their BB30 Adapter for Shimano cranks makes the fitment of Shimano road cranks to BB30 frames a simple affair. The Wheels Manufacturing BB30 Adapter consists of two reducer sleeves turned down from solid blocks of Delrin.
How do I know if my bottom bracket is compatible?
To find out the size of bottom bracket needed, measure the inside of the bottom bracket shell in your frame, it will be 73mm, 70mm or 68mm. Some older frames may have Italian threaded bottom brackets, instead of the more modern English.
How do I know if my crankset is compatible?
In most cases three-and two-piece cranksets are compatible with the same bottom brackets so long as the axle is the same diameter. They are commonly used in conjunction with the mid-style bottom bracket standard. One-piece: This is where the axle and crank arms are a single piece of steel.
Is BB386 compatible with BB30?
A BB386 chainset is designed to work with a 68mm shell but the bearings are mounted outboard i.e. the crank spindle is 18-20mm longer. If you tried to fit a BB30 crank to a BB386 the spindle wouldn't be long enough to allow you to fit the non-drive crank. It is a total of around 26mm longer than std bb30 spindle.
What is the difference between BB30 and BB86?
Measure your BB shell width - BB30 shell is usually 68mm wide whilst BB86/90 is 86.5mm i.e. you may need a spindle 18.5mm longer. For press-fit BBs for 41mm dia shells and 30mm spindle, the bearings are very small so don't expect them to last very long.
Is BB30 threaded?
BB30 cranksets have a 30mm spindle diameter. Per Wikipedia, the maximum internal width of an English or Italian-threaded bottom bracket is about 34 mm.
Which Loctite for BB30 bearings?
Apply Loctite® 609 to the bearing surfaces of both BB cups.
How long do BB30 bearings last?
If you bought the bike 5 years ago and they're just starting to make noise now I'd recommend replacing the next set after 5 years. Of you could just take the chain off the rings and spin the crank...if they're worn you'll feel it.
What's the difference between PF30 and BB30?
A PF30 frame has a shell slightly larger than BB30 (46mm compared to 42mm). The bearings are pressed into cups which are then pressed into the frame. In the case of the PF30 systems the bearing cups rely on flanges to ensure that both cups are pressed the proper depth into the frame.
Is BB30 compatible with hollowtech?
Our Shimano BB30/PF30 68mm ROAD BB. It is compatible with Shimano™ Hollowtech II cranks. High-grade Enduro 2437 steel bearings are fully sealed and are a fantastic replacement BB for your Shimano™ drivetrain.
Can I use BB30 instead of PF30?
Yes, just switch out the crank. The frames are constructed differently. BB30 uses bearings that sit in the bb shell and are held in place with snap-rings. PF30 uses a one piece bearing and composite cup that presses into the bb shell.
Does bottom bracket spindle length matter?
The critical thing is your spindle length: as long as you can set up the correct chainline you will be good to go. But, again, best never to mix standards if you can at all avoid it. If you are looking to replace a cottered crank setup with a square taper setup, then look no further than a cartridge bottom bracket.
Can I reuse press fit bottom bracket?
According to GCN and their video on press fit BB removal, press fit bearings are not designed to be removed and re-used.
What is BB86 bottom bracket?
BB86/92 bottom brackets consist of bearings pressed into cups, which are then pressed into the frame. The main dimension with this standard is the inside diameter of the BB shell: 41mm.
