I'm running 25mm Conti GP5000TLs on Light Bicycle 21mm internal rims. Not dead yet, and to my eyes they fit rather well.
Exactly the same setup here.
Vernier caliper suggests the tyre is maybe 1mm narrower than the rim.
@spinnnout started
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I'm running 25mm Conti GP5000TLs on Light Bicycle 21mm internal rims. Not dead yet, and to my eyes they fit rather well.