Joined: Jan 2008
Posts: 23,645
Likes: 1,109
From: Mans of NC & SW UT Desert
Bikes: 86 Katakura Silk, 87 Prologue X2, 88 Cimarron LE, 1975 Sekai 4000 Professional, 73 Paramount, plus more
My $5 kendas are good to 90psi. Hard to find really good tires in the 27 inch size.
I don't think you are too heavy for the tires you already have. Why not try it? Paid for stuff is always cheaper than buying new....