Which Loctite for BB90?
They recommend Loctite 638 for slipfit and loctite 609 for pressfit. Even though it is advisable to use a press for installing bearings into a BB90 bottom bracket, it is not really a pressfit.
Is BB90 press fit?
Park Tool describes BB90 bearings as “a mild press fit” — they typically don’t require as much force to insert as a conventional press-fit and, in some frames, the bearings will actually slip in by hand.
Which Loctite for bottom brackets?
Apply Loctite® 609 to the bearing surfaces of both BB cups. Make sure the application covers the entire frame contact surface. Use a small brush to ensure good coverage.
Do you need Loctite for bottom bracket?
Medium strength is enough to add a ton of resistance because BB threads are so fine. Phil Wood bottom brackets more or less rely on the cups being loctited to function and still a medium strength (Loctite 242, one of the really common blue ones) is all that’s recommended.
Is a ceramic bottom bracket worth it?
The Bottom Line: Quality hybrid ceramic bearings are better than steel bearings in a bicycle bottom bracket application because they have rounder balls for lower resistance, better races for lower resistance, and are grease-efficient in low RPM, low heat environments for lower resistance.
What is a BB90 bottom bracket?
Often confused with the ‘Shimano standard’ BB86/92 (which a number of Trek’s bikes do use), BB90 (and its MTB counterpart BB95) is a proprietary Trek standard wherein cartridge bearings sit directly in moulded carbon seats in the bottom bracket shell. You can read our complete guide to bottom brackets here.
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.
What are BB90 bearings and how do they work?
Park Tool describes BB90 bearings as “a mild press fit” — they typically don’t require as much force to insert as a conventional press-fit and, in some frames, the bearings will actually slip in by hand.
Will a BB90 fit in my frame?
With BB90 (and BB30) the contact area between frame and bearings is tiny, so the stresses are high and the likelihood of problems is inherently greater. Bingo – it is tolerances, wear and installation that are key. A correctly made and correctly installed/maintained BB90 should work fine.