Got a racing bike frame and I was wondering what size bottom bracket I should put in it.
I measured it and this is the rough figures I came up with.
35x70
What chainset are you fitting? I assume the 70 measure is across the bottom bracket shell?
It's probbaly 68mm shell. The axle length depends on the chainset you're using, not the frame.
Was going to use a double ring chainset but I dont know which one.
It's for road riding.
I am open to advice from you guys.
I need something that will allow me to keep up with the other roadies in the group.
If it's road, it'll be 68mm
I'd suggest a compact double most likely - do you know what size cassette you have on the back. How fast are you - how fast are the other riders?
Don't you need to know what thread it is?
someone should know if you mention what frame it is
Yes, could be english or italian.
[i]If it's road, it'll be 68mm[/i]
Unless of course it is a 70mm Italian size obviously...
Yeah, ok, fair point...
I believe from chatting to lbs that it could be an Italian thread.
Also its up to me which chainset I want to use will then dictate the length of BB I will need.
And I may not be able to use a compact if I have a braze on front mech which I do.
I have a yellow alloy Fausto Coppi Gavia
It does sound like an Italian BB - further backed up by the brand.
I'd suggest something like a Tiagra compact. You may have problems with the front mech if the braze on is unusally high but it's by no means certain as most do work just fine - best thing is just to try and see really though it will need adjusting to get the best from it.
