Hey pretty sure they are 19.5mm wide externally so internally I think they are 13.5/15, can measure when I get home. The widest tyres you could put on these would be 25mm's (what I used)
Cheers, Tom
Hardly used set (4 rides - roughly 200 miles). Selling due to upgrade. No wear at all to rims & rubs roll v smooth. Located NW London. £315 with conti GP4000 IIs & tubes
Will post better pictures when I get home
Any questions please ask
DNS. Haven't ridden due to patella femoral syndrome/ongoing physio. Really gutted though as felt strong and worried I've lost fitness with BUCS coming up. Looked at the results earlier, looked a strong field
weight limit is 100kg
Cheers