26x1.75 is not a proper rim size, it's just a vendor's recommendation as to what size tire would be an ideal fit. There is some leeway when it comes to tire widths and a 2.35 tire can be mounted but there might be some longevity issues.


Can you link to the wheel in question? Or does the listing identify the exact rim used?


26x1 3/4 is different than 26x1.75 and rims made for 26x1 3/4 tires will not work with a 26x2.35 tire. Since you are dealing with a 9-speed conversion this is unlikely to be an issue.