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What's the deal with 26 x 1.75 tires and 26 x 1 3/4 tires?
They are not the same size and it is because of the rims. It has been that way since 1955. That is why new tires have metric numbers that better describe the real tire size. It was also Schwinns way of making you go back to them for tires. For what is worth the tube will interchange. Roger
Thanks for the info-It's been over 20 years since I've wrenched on vintage bikes, but having the internet available this time around is great! Love The Cabe!!
So your Higgins has Schwinn S-7 rims? If your Murray built bike has the Schwinn middleweight rims your pretty much stuck with the tires that are specific for those rims only.
If you set an S-2 rim with its 2.125 tire next to an S-7 rim with its 1-3/4 inch tire side by side, you'll see that both combinations have the same diameter and circumference. Smaller tire, bigger rim, same peddle to speed ratio for both but less rolling resistance and total bicycle weight for easier pedaling. It's the combinations that have the same size. S-7 rims are "26 inch" rims but the diameter is bigger than the 26 inch S-2.
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