Problems With A Bottom Bracket

[Trials D]

The other day we (friends and me ) put a BB in a onza t-pro so we can get another friend riding.

We then fitted it and it wont turn

Does anyone know whats wrong or how to fix it?

This is a very cheap BB (un-sealed and square taper)

Is it just one of those things where what you get is what you pay for ?

or is it the people who installed it just didnt do it right?

Thanks for any help

[forteh]

Check that the cranks/freewheel arent interfering with the BB shell/chainstays, if the axle isnt long enough they may rub.

When you say its an unsealed BB, is it loose cups and bearings? If so you have probably just overtightened the bearings.

[mr_malcolm]

if its lose cups and bearings losen them of until it moves freely and doesnt feel like its harsh, also i would recomend getting rid of it if it is lose bearingsand cups for about £12 you can get a shimano bb i had one in my t-pro for overa year with no trouble. check that you haven't cross threaded it aswell because if the cup side is sitting wrong it can push the axel slightly out of position and make it hard to move. cant really thing what else it would be apart from maybe a fault in the bb itself.

[Trials D]

It is loose cups and bearings ............. We decided to use your advice and loosen the cups and bearings and it turned .... but thenthe cup BROKE (it was plastic !)

So we are going to try and get the shimano BB and we will make sure its the right length so it wont rub aswell :$ !

If we have trouble fitting it, i wont hesitate to post another comment/ topic!

Thanks again