Tubs or clinchers? If tubs, I'd go narrower than 23. I run 22c Cronos on wide 808 Firecrest tubular rims. If clinchers, then 23s on 23s. You might be able to get 23 clincher tyres on 25 rims, but I'm not going to volunteer to try it...
Have you measured how wide those Cronos actually come up as?
Nope, but it's noticeably narrower than the brake track. I'll try and remember to do so once I get back to the UK.
@umop3pisdn started
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Tubs or clinchers? If tubs, I'd go narrower than 23. I run 22c Cronos on wide 808 Firecrest tubular rims. If clinchers, then 23s on 23s. You might be able to get 23 clincher tyres on 25 rims, but I'm not going to volunteer to try it...