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They are 19mm internal and 25mm external.
There is only clearance for a 23mm tyre up front and I want to use it for winter training on mixed surfaces, so the only way of getting more comfort was with wider rims, but I might be pushing it.
However, xm119 rim is wider than archetype and costs one fifth of it, so it's a cheap experiment and it doesn't matter if the rims get a bit scratched up :)
For now they're amazingly comfy and roll great with low pressure
Simba-
Even 23mm is fine on 19mm, I've ridden on similar (with A719), your concern is simply that the low inflation will have a higher risk of chipping the rims despite the low/zero risk of pinch flat.
chipped rims not a problem if you ride brakeless as you said, but it might cause further damage than just chipping.
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They are 19mm internal and 25mm external.
There is only clearance for a 23mm tyre up frontWas looking for a picture to mark up, and somebody has already done it. With a relatively high pressure road tyre and no sideways landings off jumps, you're not all that likely to encounter this situation where the hoop stress in the carcase is pulling the bead with no restraint from the bead hook.
edscoble
gbj_tester
It'll be fine, are they're 25mm internal or external?
Would advise 28mm to reduced risk of damaging the rims on the gravel.