[yarsec]

I just installed a new Truvativ Team SL ISIS Bottom Bracket. The bearings feel really tight. Is this normal for a new BB? Will they loosen up after a few miles? The cranks will not spin freely more than a half of turn.

Thanks

 

[CleavesF]

Well it's not like it's an adjustable BB... so you really have no choice, right?

 

[yarsec]

I was thinking it could be defective?

 

[capt_phun]

If you torqued it to spec it may just be some initial drag. After you ride it the bearings will break in. Pretty common on truvativ & sram BB's.

 

[Kerry Irons]

Seal drag

I just installed a new Truvativ Team SL ISIS Bottom Bracket. The bearings feel really tight. Is this normal for a new BB? Will they loosen up after a few miles? The cranks will not spin freely more than a half of turn.

These BBs have contact seals. If the BB turns smoothly with no gritty feelings or binding, then you are just experiencing seal drag, which will diminish with time.

 

[yarsec]

Thank you. There is not gritty/rough feeling, just drag. So it will probably break in.

Chris