Tire Criteria:
Tire size must be 27 x 1 1/4 Gumwall to fit my aluminum ARAYA 27 X 1 1/4 W/O HP. (old smooth bead rim).
J B[/QUOTE]
Both my Sekai and Novara came with these rims. One came stock with 90psi tires and the other 100. Never had one blow off. I think that w/o hp means without high pressure in that they dont want some bonehead to try to put tubeulars (sp) on it. Back in the day both tubeular and clincher came in 27 inch.
I would think that not having a bead would be more of a low pressure problem. Anyway one more vote for the prima.