What to do for a 72mm BB? + GT Idrive 5 axle width

Northwind

This is a new one by me, just building up my new frame (GT I-drive 5 XCR, 08 model) and checking the manual, it has a 72mm BB. I've never come across that before, 73mm sure but not 72. I've searched the forum here but not a peep (well, some apparent typos...) and the only 72mm BB I've found is an FSA mega-exo.

So, what do I do? Use a 73mm?

Also, does anyone know the correct axle width for this frame? The swingarm seems pretty wide, I've sized it up with a 113mm and it seems seriously tight so I think it should probably be a 118 but the manual doesn't say.

Cheers!

nicklouse

sure it will be a 73mm and axle length depends on cranks.

Just get some HT2 cranks as they will do both 68 and 73mm.

Northwind

Yeah, I've already got a set of cranks off the old bike I was going to use... But then why spend £15 for another crappy powerspline BB when £50 buys a deore crank? Thanks for the quick response! I was really surprised when it said 72mm...

supersonic

GT manuals are notoriously sh1t. It beggars belief why someone with half a brain could not spend even half a day writing one that makes sense and actually has relevance in this century.

AS nick says.. is right.

Northwind

I'll remember that- should have had more faith in my 10p plastic ruler, I was putting the manual before it :roll: Cheers!

The Big Cheese

supersonic wrote:

GT manuals are notoriously sh1t. It beggars belief why someone with half a brain could not spend even half a day writing one that makes sense and actually has relevance in this century.

AS nick says.. is right.[/quote

Lol, the one that came witht the Sanction and the Force looks like it was printed in 1972

supersonic

Lol, mine still shows how to set up caliper brakes, 7 speed drivetrains and adjust quill stems!