So stick with 23mm wide rims with 23mm tyres? As much as I want wider rims, I'm not really too knee in stretching a 23 tyre over a 25 rims.
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?
@Brommers started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
So stick with 23mm wide rims with 23mm tyres? As much as I want wider rims, I'm not really too knee in stretching a 23 tyre over a 25 rims.