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Not super safe but if it feels strong then you will likely be fine. Probably.

If it were me I'd test it by pulling it around with medium-high force. Then if you ride it just stay in the saddle.

All these search options become part of the URL right? Maybe just change the search text in the URL, but keep the rest, hit enter?

Obviously not gonna work on the phone app.

Dibs the Borgen bike hanger, if you can post... will PM.

Would rep

Second dibs on that 42T chainring

I've not tried this, but if it's assembled as far as frameset+wheels+post+saddle then you can get a friend to sit on the bike (and hold a rail) while you measure the forks?

I’ve been to three four bike shops with no lunch.

It's only noon, you've still plenty of time for lunch.

For particular bolts go to Clerkenwell Screws! Fun shop.

There's always le Petit Porteur...
(though it's at least an order of magnitude more expensive than just buying a rack)

Niiice build my dude. Looks pretty quick. How does it ride?

I'd like to see how it'd look with champagne gold bar tape +
saddle. Or maybe just with a change of tyres to gumwalls.

A nice offer but you get 0/10 for thinking - I just won a vgc Ultegra BB last night on eBay.

I trust the CK is smooth as silk.

Done some more calcs... Looks like I need a 11-28t cassette (Shimano fit, 10 speed). Anyone have one that's new / VGC that they could sell? I'd forgotten how £££ they are!

Not gonna work. Shimano finally changed rear mech pull ratio for 11 speed.

The reason you can mix 6,7,8,9 & 10 speed Shimano road groups is that no matter what, each 1.0 mm of cable pull always results in 1.7 mm of derailleur travel. But with an 11 speed mech you only get 1.4 mm travel.

Needless to say, if you're using 7800 on a CR1 then you're already building a very light bike without needing to go full WW. And it'll feel amazing to ride.

Much will depend on wheels of course. Those Ksyrium SL S.P. wheels are apparently 1500g. Not too bad tbh!

Maybe just consider the affordable WW hacks, if any?

• CNC brakes (~£70 on eBay) like Planet X or Fourier's, are 205g a pair. 7800 brakes are 315g

• Lightweight butyl or latex tubes are <70g each. Normal tubes are 100g ish.

• A carbon saddle (i.e. Romin) might save you 100g+.

• Most bar tapes are near 100g, Deda tape is 40g.

That's ~350g saved without buying anything too fancy. Might turn a 7.3kg build into 6.9kg.

Either way it's gonna be pretty zippy.

£50... plus another £100. It's a 653 frameset with beautiful original paint. Could go for £200. But yeah not heaps more.

Would be amazing with a 7400 group on it, or maybe one of the later downtube shifter groups (7s/8s).

Lol £2000.

I think the seller will need to learn for themselves that it won't sell at that price. A month or two of nothing but silence and lowball offers. Then they may come around. But it sounds like they got them dollar signs in the eyes for now.

Holdsworth made cheap frames and fancier frames. While that frame looks tidy, I would say you are going to need more detailed photos so that people can get an idea of frame quality. You're asking £350, not £100... buyers are going to be discerning!

That looks like my plan A for now! I will hold fire until the bars come so I can check fit. Will let you know.

Thanks for the offers y'all. I appreciate.

So far I've found cranks and I've changed my requirement to a 32t cassette (10s).

I think a slight bend would perturb me chiefly because of potential for reduced grip on the frame dropouts. i.e. Because of the angle created between QR plate and dropout face.

But this might be totally fine. Just test it. If you can't wriggle, wrench or mallet the (inflated!) wheel out of the frame then I would trust it.

Do please PM me about that cassette and chain.

I'm not super-keen on those cranks. I don't think they're lighter than something more reliable like Dura Ace 7800. Still hunting. I might just eBay some 7800.

Super rad

You are very generous, thank you. If I need a shim I'll holla.

I'm after:

• 46t chainring, 130 BCD

• Ultegra hollowtech II BB

• 10 speed bar end shifter, Shimano, right only (would consider a pair if not pricey)

• Short stem, 31.8 & 1 1/8, 80 mm (need to double check length)

• 10s cassette, 11-28t, Shimano

• Shimano Ultegra 6700 rear derailleur, 10s

Dreamy

If you like you can bring it to Stamford Hill and I'll do it with you. If you get stuck like.