- Bottom brackets and bearings (slight rant)
Has anyone actually managed to successfully change the bearings in a HTII type BB?
I just tried it and the plastic covers (ie ‘top hat’ on Shimano) makes it impossible!
MegaExo and Shimano take the same bearings, so thought I’d swap the good Shimano bearings to the MegaExo and the FSA bearings don’t come out without demolishing the plastic cover. Swines.
And I’ve been led to believe (on here) that you can use a Shimano BB with a FSA crank – well the top hat on the Shimano BB doesn’t fit over the FSA axle, so you can’t!
Hmph.Posted 6 years ago
Getting the top hat out was easy enough for me, can’t remember exactly what I did though, for just that reason. Poked them out from the inside I imagine… Getting one of the bearings out of some Shimano BBs is pretty awkward as it’s almost blind on the inside.
Oh and I just fitted an FSA (Gravity Light) crank into an SLX bottom bracket, it was tight but it went.Posted 6 years ago
@Trekster – So you reckon you’ll get them back together ok? And they’ll be sealed enough?
Shimano are so cheap it’s not worth the bother I reckon.
@Northwind – yep very tight – pushed the Shimano on to the FSA axle and could only get it off by screwing the BB cup into the frame. Hit the axle to remove and the top hat was left stuck on the crank!Posted 6 years agobm0p700fMember
Unfortunatley Shimano do not sell the plastic cover seperatley so if you break it when removing your need a new BB.
Raceface BB do supply spares for there X-type BB’s. So you can remove the bearings and put good quality 6805 bearings in and fit new plastic covers. I do not know if the are compatable with FSA cranks though.Posted 6 years agokinda666Member
Drop the BB shell into a cup of boiling hot water, top hats come out really easy then!Posted 6 years ago
I’ve ditched my FSA afterburner cranks now for some SLX ones as I found it difficult to source bearings for the FSA and new cups were costing me £30 a pop, and didn’t last that long anyway!
Incidentally, even though my cranks fitted perfectly into my Shimano BB, I’m slightly less impressed with the fact that they hadn’t cut either pedal thread all the way through- both needed tapped out before they’d take a pedal. I knew there was a reason I buy Shimano cranks!Posted 6 years agoTreksterSubscriber
Des…I was just at a loose end/in between jobs at work, taking stuff to bits is what I do 🙂
Mtbmaff….made my own tools 😉Posted 6 years ago
I’ve got the tool, Trekster. Its just the things ain’t designed to be taken apart… ok the Shimano top-hat can be replaced, but the MegaExo is different – has a plastic cover and 2 rubber seals – both of which get mangled when removing the bearings.Posted 6 years ago
This leaves you with a rather useless cup & bearing combination.PaulDMember
Check this out at CRC….I got a set ‘by accident’ when they completely mis-priced the huge Race Face Shop BB bearing kit.
Seems you get all the bits, but the question of quality remains…
Like you, I prefer square taper and XT or more recently Token BBs.
PaulDPosted 6 years ago
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