The K75 is a great choice to replace old tires on certain old Schwinn bicycles from the 50's, 60's, and 70's. Specifically, these tires fit Schwinn 26 Inch Middleweight rims (571 ISO). 26" x 1 3/4" (47-571 ISO). All Black. 615 grams. 45 max PSI.

Note: These tires are not interchangeable with more current 26" mountain bike tires (559 ISO), which use a decimal width measurement rather than a fraction, nor are they interchangeable with other uncommon 26" tire sizes. Please look for the ISO measurement on the side of your existing tire, and match it.