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Keirin riders manage 2000w sprints on quill stems... If you need that much stiffness why would you start with a skinny tubed frame anyway.
looks exactly like a threadless setup
Really? 1 1 /8" stem on a skinny headtube for 1" fork is always going to be out of proportion to some extent.
Lolo-
Have you never stood facing the bike with the front wheel between your legs and twisted the bars side to side? It doesn't take a huge amount of force to flex most old setups to buggery.
I don't know about any 2kW action, but quill stems are just yesterday's shit; al dente boat anchor gear. But mainly, skinny bars are a joke. They may well have clamped okay when they were all made of steel, and being on the hoods wasn't much of a position, but that ancient interface just doesn't cut the mustard sometimes when you land after riding off a tall gutter or something. It's so marginal. And of course, you can forget carbon bars.
It's definitely a shame that 1" threadless wasn't a thing for longer, until 31.8 bars came along, and thus you have to use a steerer shim to get fat bars on a skinny fork; some sleeker stem options would be grand. At least you can still get some rather nice 1" threadless forks...
Really?
Um, yeah - the Innicycle threaded to threadless adapter is completely indistinguishable from a pure threadless setup; the only giveaway is knowing that particular fork was only ever available as threaded, or maybe recognising the headset. Judging by your subsequent talk of proportion, I think you must've misread that statement.
Kimmo
Nice one. I found out about it from the guy who invented it at Bike Forums, and came in here pimping it for all I was worth; too many flexy old quill stems and skinny bars in MGOOF.
If you're gonna hotrod an old frame, I say bring all the performance improvements.