Velo Orange Threadless Bottom Bracket Review
11-12-13 | 10:06 AM
#2
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Joined: Aug 2005
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From: Pittsburgh, PA
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Good report and thanks for the info. I'm surprised it's possible to recut Swiss (35 mm x 1.0 mm) threads to ISO (1.37" which is 34.8 mm x 24tpi or .95 mm pitch) without a really sloppy fit.
11-12-13 | 02:09 PM
#4
Collector of Useless Info
Joined: Aug 2009
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It's not that bad to re-cut the threads. It's commonly done on the old Raleighs to go from 26 TPI to 24 TPI. That left 3 good rows of threads, and 3 is enough to hang an integrated bottom bracket onto. For Swiss, at 25.4 TPI and a slightly larger diameter, there may be 5 rows of threads intact after re-cutting. If you use an ISO threaded BB at 1.375" = 35mm rather than a BS at 1.370", then it will be plenty tight.
OP- Where did you pick up yours for slightly less than $70?
OP- Where did you pick up yours for slightly less than $70?
Last edited by cycle_maven; 11-12-13 at 02:15 PM.
11-13-13 | 05:53 AM
#6
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From: Switzerland
Bikes: road+, gravel, commuter/tourer, tandem, e-cargo, folder
I'm a bike mechanic in Switzerland, so this is all useful info, thanks. Being on the French-speaking side of the country, we actually see a lot more French-threaded BBs than Swiss here.
11-13-13 | 08:30 AM
#7
Senior Member
Joined: Aug 2005
Posts: 33,657
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From: Pittsburgh, PA
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
And yes, I made a calculation error in the thread pitch. 24tpi is indeed 1.058 mm.
11-13-13 | 02:09 PM
#8
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From: NJ
I kinda feel like asking at some shops, just to see who know what's up....
11-13-13 | 03:45 PM
#10
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From: Middle Earth (aka IA)
Bikes: A bunch of old bikes and a few new ones
I've had it done to a bike before. I picked up a need Cilo frame (Reynolds 531 DB, campy drop outs, sports touring frame) with a swiss BB that someone had mangled probably because they had no idea what swiss threading was. I had the BB reamed out and tapped to Italian which, if memory serves me, is a little bigger in diameter than Swiss. I built the bike up and gave it to my brother who is still happily riding it. The job came out great but you certainly want someone experienced doing it.
11-13-13 | 04:28 PM
#12
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From: Middle Earth (aka IA)
Bikes: A bunch of old bikes and a few new ones
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