Over the last couple of years and buying used wheels I somehow ended up with a front rim that is 622 x 17 and a rear wheel that is 26 x 1.5. It is a mountain bike but I only use it at this time for commuting and I only need it for another couple of months so i don't want to spend a lot of money.
I just bought two 26 x 1.5 inch tires but of course the tire for the 622 X 17 was a little tight and I was confused until finally figured out what size my wheel is. The 26 inch diameter fits after a fashion but will it be safe for me to inflate it and use it? or should I return it and then what size should I buy that will work in conjunction with my 26 x 1.5 inch rear tire? I did get a high pressure rear tire.
Oh yes, the inner diameter of the 26 in tire is about 22 inches and the outer diameter of the 622 wheel is between 22 and 23 inches. It's hard to tell since the hub prevents exact laying of the measurement across the wheel.