Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,221
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
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The last time that I mounted new Michelin "20mm" tires on narrow rims, they actually measured out to 22mm wide on narrow rims at 100psi.
Some recent "23mm" Hutchinson tires measured the exact-same 22mm on the same rims at the same pressure.
These days, I prefer using 25mm GP5000 tires on both narrow and wide rims. Not funny-looking at all, plus great performance, smoothness and wear.
Lower pressure reduces tread wear!
The GP5000 tires are available in black, brown and light-tan sidewall options!
The former GP4000 tires ran a little wider versus the 5000's, as the expected rim width is wider these days.