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It's funny how these small parts can be such an Achilles' heel when restoring old bikes. I thought it was a miracle that I could acquire the various pieces I needed previously (brake clamp bolt, chainring bolts, sunken brake nuts in differing lengths) but then this comes along, the most innocuous of all, and it has stumped me... for now.
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@190-215GPa Dave, the ferrules arrived today and I took them straight to the Pinarello garage. Thanks so much for sending them, it was very kind and your note made my day!
However, they aren't the correct type. It is my fault. After trying not to weep uncontrollably and having now consoled myself, I have discovered that there are two forms of these different Cinelli diver's helmet braze-ons. For anyone who may have this issue in the future, I've attached a handy image.
Of course, mine is the 5mm internal diameter type, and of course, these are as rare as it gets. I found a few photos (attached) to show the exact form of ferrule needed - notice the shape is different from the others, with a shorter insert and slight curve at the end.
I may have found one in Germany, but until the seller confirms the diameter, the bike remains with Pinarello.



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@Tracks I used Express Imaging on City Road for several years, and also Davies Colour on East Tyndall Street, which is a Pro Lab. For snaps I think the former is fine, for anything serious I'd use the latter.
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Thanks, I'm completely bemused by the whole situation to be honest, as the LBS are convinced I need a ferrule without the stepdown, but I am (perhaps with a little less conviction) sure it needs the stepdown type. However, they've tried with a bucket of ferrules (literally) and none fit. So maybe they are right?
Did you get a chance to measure it so I can
go back and tell them to eat shitfind a suitable alternative online? -
OK, I've spent far too long looking at these bloody things today, but I think this is what is needed. A 5mm, non stepdown ferrule (for gear cables). This is a Shimano SP50:

As I've written that it doesn't seem right. Everyone else on the internet seems certain it needs a 4mm step down ferrule. I can't see how the type above would fit.
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OK, we're making progress. Managed to track down the brake clamp bolt and have also installed a 12-25 Campagnolo cassette. While I was at it, and for reasons known only to me, I serviced the rear hub and rebuilt it. Much better design compared with the Shimano Ultegra hub I attempted last year. Photos to follow tomorrow.
So, the important part - tyres. Was thinking gumwalls but don't want to spend a lot. I think 700 x 25c would be pushing it, so I guess 23c would be the safest option. Anyone got any ideas?
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@sharpeleven I owe you a beer! In my excitement to get the bike put together I hadn't noticed that the big ring was incorrectly mounted - well spotted and thank you. I've corrected it and now...
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I notice the older Daytona bottom bracket had a choice of 111mm and 115mm spindle lengths. This (brand new) Centaur one is 111mm. Could I be that unfortunate and this frame needs the 115mm? @macaroon this is exactly what you were referring to, isn't it?
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Ah sorry, yes I see it now. I meant 5mm. I'll edit it 👍🏼