BB86 and BB92 are much more commonly used, as is the identical PF86 and PF92. Shimano's naming convention for its press-fit bottom bracket parts is confusing, to say the least.
Is BB86 the same as BB90?
No difference. They are one and the same bottom bracket. Well, BB86 refers to road bikes with their 68mm BB shell; BB92 refers to mountain bikes with their 73mm BB shells. BB90 is Trek's proprietary standard and is the odd one out here.
What does BB86 mean?
The road standard has an 86.5mm shell width (hence BB86) whilst the mountain bike standard has a 91.5mm shell width. A number of other shell widths may also exist, though they all use the same bearing cups. More recently, bearings have shown up that allow a 30mm spindle to be used.
Is BB86 the same as BB30?
BB86 and BB30 aren't compatible, they're two different standards. I have two frames with BB86 and they've been creak-free and have decent bearing life. There's good reason that Shimano have never made a BB30 crank – it's a pile-o-poo!
Are all press-fit bottom brackets the same size?
However, bottom bracket bearings are available in this standard for 28.99mm, 24mm and 22/24mm spindle systems. The only commonality amongst these different terms is the 42mm nominal press fit dimension.
28 related questions foundWhat 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.
How do I know my bottom bracket size?
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.
What size are BB86 bearings?
A BB86 shell is 41mm and a 6806 bearing is 42mm on the outside diameter.
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.
Is press-fit 30 same as 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.
What is a BB86 frame?
BB86 is a Shimano developed bottom bracket standard. It has a shell diameter of 41mm and a width of 86.5mm. This is a popular standard and used on a variety of bikes including Canyon, Argon 18, Giant, Trek, BMC, Winspace.
Are all hollowtech BB the same?
Since the spindle is part of the right crank, there's no issue of compatibility. All Hollowtech II cranks work with all Hollowtech II bearing units. Any crank that fits on one type of spindle will fit on all spindles of that type, but if the length is incorrect, the chainline/clearance will vary.
Is BB30 the same as BB92?
Nope. The spindle on a BB30 crankset is too large (30mm) to fit through the hole in a BB92 BB shell and still have room for bearings. The spindle size on a crankset that is compatible with a BB92 is 24mm. You can go the otherway though...
Are BB92 and PF92 the same?
There is no "PF92" standard. BB92, BB86, BB121=PF41 The number following "BB" indicates shell width in mm. The number following "PF" indicates the I.D. of the shell in mm. So a BB92 frame's specs would be a 92mm wide shell that's 41mm in diameter.
Can I use a 68mm bottom bracket in a 73mm shell?
You could install it, but it will shift your chainline, shift the centerline of your feet, clearance issues might arise on the non-drive side, and you might be leaving some BB shell threads exposed on the non-drive side as well.
What bottom bracket does giant use?
Giant Bicycles has a long collaboration with Shimano. It is no surprise that Giant's frames follow the BB86 and BB92 standard developed by Shimano.
What is a BB386?
BB386 EVO is a road bike bottom bracket standard introduced back in 2011. The BB standard is based on a frame shell width of 86.5mm and inner diameter is 46mm.
Is BB386 threaded?
MegaEvo is a threaded bottom bracket that allows the installation of a BB386EVO crankset into a standard 68mm BB shell with BSA threading.
What cranks fit BB386?
Standard 24mm cranks from Shimano, SRAM and others fit inside BB386 EVO without a problem. The width matches the axle width and there are a host of bearing and cup options to connect crank and BB shell. For 30mm axles, most cranks also fit.
Is dub compatible with BB86?
This BB86 DUB bottom bracket module is 100% compatible with all crank-based power meters.
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.
Are press-fit bottom brackets any good?
After a decade or so of press-fit bottom brackets being the dominant system on high-end road bikes, there has – to almost universal acclaim – been a notable return to threaded bottom brackets in the last few years.
Do bottom brackets make a difference?
(Click here to read BikeRadar's complete guide to bottom brackets.) According to Friction Facts' latest report: “No statistically significant difference exists showing a general advantage or disadvantage of a standard type under similar loading conditions.
How do I know what size crankset to buy?
Crank length is measured from the centre of the bottom bracket axle to the centre of the pedal axle. If you're not sure what length the cranks on your bike are, the quickest way of finding out is typically to just look at the backside of your cranks, just below the pedal axle.
