Are you racing on them? Yes, 25mm max. No, fit the biggest tyre that'll go in your f/f. Easy peasy.
Sounds like 30mm is the way to go. My old wheels had a 19mm internal width, Pirelli P-zero 25cc tyres came up to 29mm when blown up, that's why i ask whether it's worth downsizing and avoiding any potential balloon shape.
@miloas started
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Are you racing on them?
Yes, 25mm max.
No, fit the biggest tyre that'll go in your f/f.
Easy peasy.