- Shimano BB Bearings
Enduro sell a set but they are rubbish- worse lifespan than you’ll get from a deore BB and cost more. Shimano don’t lend themselves very well to this. Though, some people have happily replaced the bearing with a thicker one and “narrowed” the BB using less spacers.
An alternative might be to pick up a Gusset EXT24, which are a little more expensive than Shimano when new, but take standard bearings and are very easy to change.Posted 4 years agotmb467Subscriber
You can shave the lip and lower 1mm off the top hat edge and thus reduce the thickness and depth
The axle can then run on the existing top hats / new bearings
Alternatively get new top hats from Superstar or other places. It can be done tho – and easily. I’ve got a spare set of bearings if you want em to try firstPosted 4 years agoMary HingeMember
I’ve used some of the wider ones. The top hat seal spacer thing doesn’t fit as there is a lip that clips around the inner race.
I mullered mine in a bit, having first removed a 1mm spacer from the drive side. However due to my frame suiting 2×10 and me running 3×9 I needed to play around with the spacing to get the granny useable with the direct mount front mech. Was a bit of faff but all good now, and not connected to the bearing issue, but helps explain why I persevered 🙂
Been in for a few months and has been fine. I will need new top hat doofers when I come to replace the bearings next time though as they will be toast. So I’m keeping my eye on XT BB deals as they sometimes pop up for not much more than a tenner.Posted 4 years agobigyinnMember
I wouldn’t bother. Too much hassle trying to get a 7mm bearing in a Shimano BB Cup. Better to get one that takes 7mm bearings and then swap them out when you need to. Although you could get 1mm machined out of the Shimano cups and replace the top hats.Posted 4 years ago
Personally I just get a Shimano BB, they’re too cheap to worry about faffing about with. Which is why I’ve got a Hope BB. *shrugs shoulders*gravity-slaveMember
Get a couple at once and XTs work out about £14 from Rose – XTR’s under £20Posted 4 years agojamesoSubscriber
This is what I’m going to try when my last spare Shimano dies. Replaceable bearings.Posted 4 years agoKlunkMember
one good reason would be they are the wrong size 7mm wide shimano are 6mm.
yes and no, shimano are 6mm + 1mm for the external seal, so you have to find alternative top hat, like the raceface ones. or you can actually file down the lip on you original shimano ones to fit but thats quite time consuming and very tedious.
a bit cheaper herePosted 4 years ago
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