Tyre fitting problem

[Rusty Scrubber]

 

[hamster]

There's your problem - the tyres are 590mm bead seat diameter, while the wheels are 597.

It's the ETRTO number which matters most.

 

[BerthaPog]

I have two 26 x 1 1/4 wheels, and have two 26 x 1 3/8 tyres that I'd like to fit.

The tyres seem to be too small for the rims, which is surprising me, or at least they're very tight and I haven't risked damaging them yet by forcing them.

According to Sheldons tire size chart, they should be compatable, but am I wrong?

http://sheldonbrown.com/tire-sizing.html

The tires going on are 35 - 590 (650 x 35 A - 26 x 1 3/8 ) World Toour.

The tires I took off are 26 x 1 1/4 (32 - 597) fits BS rims EA 1 E1

Any tyre experts?

No tyre expert, but speaking as engineer (software) the issue is the 590 vs 597. Looking at Sheldon there are two 1 3/8 sizes - one with a BSD of 590 (E.A.3) and one 597 - (S-6). I suspect you need the latter, and no amount of brute force/swearing will overcome the 7mm difference in BSD - almost identical to the difference between 700C & 27" rims.

 

[Rusty Scrubber]