Can you tighten a bottom bracket
There are special spanners you can buy for this or you can use an adjustable spanner to move the bottom bracket cup and a screwdriver tapped gently with a hammer to tighten the lock ring. You may have to improvise further with your choice of tools.
What causes a loose bottom bracket
Most surprisingly, what often sounds like a bottom bracket creak is actually something else. Most of the time, the true cause is a loose chainring bolt—tighten them up and that'll quiet most creaks. … Crank bolts: If your cranks move side to side more than 1/16 of an inch, you've found the likely creak source.
How do I know if my bottom bracket is too tight
If the BB is too tight, it will not rotate without grinding or feeling stiff. In fact, if you ever tighten an adjustable (open/loose) BB to an extreme, the BB will not move at all. If you diagnose this problem in an open/loose system, you must loosen the adjustable cup until the stiffness lessens.
Can you over tighten bottom bracket
If you overdo this, you'll load the bearings such that they wear down faster. If you've overtightened this, you need to undo it. Same with putting the non-drive side crank arm (which is something like 15 Nm normally).
What happens if bottom bracket is loose
An open/loose BB will need its bearings adjusting (via the adjusting cup) or replacing. If you diagnose a loose BB in any other type of unit, such as BB30/90s and outboard bearing units, the first thing to check is the attachment system of the cranks and/or BB spindle.
How tight should a threaded bottom bracket be
If your bottom bracket's threads are particularly tight, you might want to have the them chased to see if they can be freed up. Generally speaking, with bottom bracket thread, you don't want them 'baggy' and loose, or annoyingly tight, somewhere in between.
Should bottom bracket threads be greased
In the case of the bottom bracket, you will use the grease when you install it, whether it is threaded, press fit or similar, and in the same way when you install or clean the cranks. The point of contact of the cranks with the bottom bracket should be greased too.
What do I do if my bottom bracket is loose
Firmly hold the bike steady and attempt to move the crank from side to side – in the opposite plane of motion to its rotation. If there is any play from side to side, the BB system is loose. An open/loose BB will need its bearings adjusting (via the adjusting cup) or replacing.
Is my bottom bracket worn out
If your crank is wobbling or there's a noise in your bottom bracket when you're pedalling, maybe it's time for you to replace your bottom bracket. "noise from bottom bracket" can also mean loose chainring bolts or a broken frame, and is most often the former.
How often should a bottom bracket be replaced
There's really no periodic time period for BB replacement. You run em till they die. If the bearings are smooth without any perceptable play, then they are fine. When things eventually get contaminated (if they ever do), then you'll notice roughness, crunchiness or significant play in the bearings.Oct 18, 2005