Knobbles though. The current 50mm guards were a bit small with the 2.3" slicks, but they didn't rub. With the 2" Bonty XR1s on slightly wider rims, the side knobs rub the stays. Whereas the 60mm gb guards on my old beater fit perfectly with the 2.25" Ritchey semi-slicks on the same rims
Hmm, not sure. I have the 45mm and they're a good fit for 35mm Kojaks.
Still cheaper than PDWs :-)