Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,194
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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That 30mm seems really small for a Pasela 1-1/4" tire. Can I assume you're using narrow (19-20mm) rims? How about inflation pressure?
I always use a 22mm Mod58 rim for my 27" tire test-fits, and I got 32mm at 90psi after the inflated new tire had settled for an hour on a warm day.
30mm is still at least as wide as the 1-3/8" knobbies though, and wider than the 1-1/4" Aramdillos.