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Hi. Here's an Ottavio Dazzan. Columbus SL. A quality '80s Italian frameset, with close clearances, a Cinelli bb shell and nice lugs and fork tangs.
54.5cm c-c, 56cm c-t. 56cm seat tube.
It's a long-time forum bike: see here and here. My boys aren't using it and it's too small for me.
Frame, forks and headset £100 posted. I may also have a spare ITA bb.
The frame builder is a mystery. It was one of the frames from Dazzan's sprint school.
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1970s Ron Cooper. I'd posted it to the Current Projects chat and miscellany thread. Sticking it here for completeness.
I finished this a couple of weeks ago. Other than a lot of cleaning and polishing, I didn't do a great deal with it, other than swapping out a few non-period parts. It's got a 65mm shell, which is a weird old standard. A couple of washers allow a standard 68mm BB axle to work. Gonna stick a brake on and use it on the road mostly.
I grew up near Ron's shop and really wanted one. I could never afford/ justify the extra cost of a handbuilt frame, so I made do with a second-hand Geoffrey Butler - still a great frame.
The seat cluster and perfectly-curved forks were Ron's signature, as were the occasional cut-out on the lugs. Oh, and he built his frames without a jig, as he believed a jig introduced unnecessary stress.
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Thanks. Nice to get the nod from a master of clean builds.
It's not NJS. Does the NJS version come in ISO as well as JIS? I do get confused with NJS standards.
I bought the wheels used, and I'm not going to race on them, so gonna keep radial front.
I've got a 27.2 7410 seatpost but, annoyingly, the frame is 27.0. I thought that was impossible: I'd never, ever, heard of a British 531 frame being anything other than 27.2. I've since read that it could be down to how the framebuilder chose to finish the seat cluster. I may speak to Geoff Roberts about whether I can ream it carefully. I do want that clean 7410 finish.
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Fingers crossed you can extract your project from them.