Wow...I did NOT expect that..

[Lewis Moon]

I have a set of 28 Conti GP 4000s that run somewhere north of 30 on a set of DT R460 rims. While I was doing a bit of wrenching this afternoon I slipped that wheel into my Denny built Masi 3V. They fit with about 4-5mm on the front and gobs of room on the rear. A bit more room than on my Ritchey Chicane....
not that I'm ever gonna take the Masi off pavement...but the room is nice.