eldavo wrote:Thanks, worst case could you talcum powder pre-stretch a 559 onto a 571, with aid of sunny afternoon and cold beer?
Practically*, there's only three sizes of tubular available: full size (same brake track as 700C/ETRO 622. variously called 27" or 28"); 26" (same brakes as 650C / ETRO 571) and 24" (which I've never had).
You need 26" tyres. Bike24 have a range from Conti and Vittoria from 18euro (which shows there's a 22" tubular range too). Tufo do them too.
It seems that, once again, I'm wrong, sort of. Wheelchair users also
have a 25" and a 20 and..
I say "sort of" as they say
Sizing is subtly different to clincher wheels and can be a bit confusing as most manufacturers still quote the old imperial sizes. However there are only 2 real sizes widely available: 27", 28" and 700c are all the same size: 28"/622mm, and 571mm/26" is the same as 650c. Then there are the weird small racing chair sizes...