What is the difference between BB30 and BB90?
So, BB90 refers to the width of a Trek frame down there in the bottom bracket area, where so much beef is required to make a really strong, stiff frame. Conversely, BB30 refers to something else entirely: the diameter of the bottom bracket spindle. Then there’s BBRight, and this is Cervelo’s standard.
Are all bottom brackets the same diameter?
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.
How long should a press-fit bottom bracket last?
These bottom bracket units can actually be pretty sturdy and can last for years or decades and the user pretty tosses in a new one when it seizes up in a rainstorm.
What is the difference BB30 and PF30?
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 the difference between Trek BB90 and BB95?
The BB90/95 standard is currently used by Trek. Two sealed bearings are pressed directly into the frame’s bottom bracket shell. A step is molded in to the frame for the bearings to seat against. Trek BB90/95 frames do not have bearing retianer clips.
Why choose Shimano press-fit bottom bracket?
To meet customer needs in the best possible way, SHIMANO has developed the press-fit bottom bracket, staying focused on our final goal: total performance in pedaling. The bottom bracket axle is steadily supported by the wide placed bearings on the basis of HOLLOWTECH II technologies providing highly-efficient power transfer.
Is BB90 the best bottom bracket system for You?
Trek BB90, and its mountain bike sibling BB95, are excellent bottom bracket systems. We get a lot of grief for saying things like this because there are legions of BB90 haters out there who are convinced it is the worst thing since unsliced bread. And they are vocal. Our answer to them is simple: You’re not doing it right.
Will a loose bearing damage my Trek MTB frame?
Yes, every time you pedal a stroke and hear a creak from a loose bearing you are causing damage to your carbon frame. As long as you get on it right away there won’t be any lasting damage to your Trek MTB.