External BB in threaded frame?

fastandfuriousxc

Hi,

Might seem like an obvious question but can you use an external Bottom Bracket in a threaded frame which is running a truvativ powerspline?

Cheers

Anonymous

yes. External BBs screw into the threads on the frame.

fastandfuriousxc

Thanks,

The thing i couldnt find was that external bottom brackets dont come in frame widths (eg.68 73) So will they fit in any size frame.

Also do the external BB cranksets come with bottom brackets? looking at http://www.chainreactioncycles.com/Mode ... elID=23241

Many thanks

nicklouse

yes as you just use the correct number of spacers. there are kits to fit frames wider that 73mm

fastandfuriousxc

Cheers, so they cannot be fitted to a 68mm frame?

nicklouse

yes they can.

Anonymous

fastandfuriousxc wrote:

Thanks,

The thing i couldnt find was that external bottom brackets dont come in frame widths (eg.68 73) So will they fit in any size frame.

Also do the external BB cranksets come with bottom brackets? looking at http://www.chainreactioncycles.com/Mode ... elID=23241

Many thanks

I've only used Shimano external BB, but I presume Truvativ are the same.
Shimano BBs will fit either 68 or 73mm shells, you get spacers included to make it fit either size. Also when you buy the chainset, you get the BB with it.

However, a friend of mine had Truvativ Firex cranks on his Norco six, and they kept coming loose all the fricking time - so much so that it became a running joke.

Anonymous

Damn, Nick, you're too fast for me!

fastandfuriousxc

So do they fit a 68mm frame and then you buy spacers for any size bigger?

Anonymous

Shimano ones come with the spacers supplied to fit 68mm or 73 mm. I presume that Truvativ do the same, as they don't spec BB shell width.

fastandfuriousxc

Thanks that clears that up,

When you buy a crankset does it allways come with a bottom bracket unless stated as on alot on CRC they include the weight including the bottom bracket but dont actually say if it is included or not.

Thanks for your help again, much appreciated guys

Anonymous

Again, all the shimano ones do. I'm unclear on Truvativs.

supersonic

Truvative GXP cranks come with the BB.