Replacement Bottom Bracket Option for Isis Drive BB

[CdT85]

Hi All,

 

I currently have two MTBs running 68 x 113 mm ISIS drive bottom brackets. they seem to only last a year if I am lucky. Currently have Truvativ Gigapype in both, but the bearings does not last. I have tried alternative with brands as well, which I won't name, and bent one's axle and snapped the other one clean off, resulting in a fair amount of damage to myself.

 

I have tried doing research to find out if I can convert to hollowtech bottom brackets, but cant seem to find enough info online. The Isis drive is english/ISO thread if I am correct?

 

Can I convert to a hollowtech bottom bracket? and what implications will there be apart from needing new cranks?

 

Thanks in advance

[droo]

You can convert to external type, but as you say you'll need a whole new crankset.

 

Other than that you'll just need to get the BB shell faced, your LBS should sort this out for you without bankrupting you.

[CdT85]

Hi Droo, Thanks for the response. What do you mean with faced?

[Vangar]

Hi Droo, Thanks for the response. What do you mean with faced?

 

I can answer that one. Basically they cut it flat removing a little metal so the cups line up and the axle of the hollowtech crank runs true on both sides.

[CdT85]

I can answer that one. Basically they cut it flat removing a little metal so the cups line up and the axle of the hollowtech crank runs true on both sides.

 

Ahh, Makes sense. Thanks. Will inquire this at my LBS