veeram

I just picked up an old Univega Nuovo sport. It seems to be in decent shape, I know it's nothing special, but thought it might be decent for a few rides during the week.

The rear wheel is Marked " Araya 27 x 1 1/8 W/O Japan " and the tire (thats need to be replaced) is Marked " Univega 27 x 1 1/8 Sport touring - and what looks to be " 100 PST 320 GR" Maybe the PST is actually PSI ?? Also on the rear tire is "28-630 (27 x 1 1/8)" Not sure what the 28-630 means.

The front wheel is not original and is unmarked but tire size is 27 x 1 1/4.

I'll make an assumption that neither wheel is of the hooked rim variety and that if I want to have tire pressures in the 100 PSI range, that I will need a new wheel set ??? If so any recomendations that won't break the bank ??

Any help is much appreciated,

V

DiabloScott

I'd bet that's a bad assumption and you can use any tires you want. Pop off the old ones and look at the rim. Non-hook bead rims disappeared a long time ago.

veeram

Hi,

Thanks for the reply. That bad assumption was based on the 27 inch rims, which are also somewhat old I believe. Can you give me a brief primer on what the 28-630 numbers on the rear wheel mean ? Thanks

leecycle

The 28 refers to the rim width in mm and the 630 refers to the rim bead diameter in mm. See https://www.sheldonbrown.com/tire-sizing.html for more information.

DiabloScott

28-630 is just the ISO way of saying 27" x 1-1/8

https://www.sheldonbrown.com/tire_sizing.html