Originally Posted by
cyclo.man
Good topic...I have video about this but still i couldnt record the english one

Basically multiplying rim width with 1.4 gives narrow limit, 1.8 optimized limit, in older rims 2.2 but for now 3 gives the wider limit of tyre that can suitable for the rim
Good rules of thumb. Do those rules apply to all hooked bead rims?
I was digging around because my new ride came with rims that measure 18mm inside, and I was wondering if I could mount 700 x 28 tires on them. Fortunately, they're a good match. I'll ride the stock Turbo Pros for a while, and then make the change.