Question from BIKE reader Stephan A.: "I read the wheel test with great interest. What surprises me: Is there a correlation between the inner rim width and the maximum permitted/recommended tyre width? While Spank and Sun-Ringlé rims (18.3 and only 18 mm respectively) can be ridden with tyre widths of 2.35, Tune only allows 2.2 inch wide tyres with a rim width of 21.4 mm. What does the actual possible width depend on? Or to put it another way: I want to run widths of 2.4, what rim width do I need?
Answer from Dipl. Ing. Stephan Ottmar: The manufacturers obviously have different recommendations, which you should follow if you don't want to jeopardise your warranty. Based on our experience, we recommend 2.4 inch wide tyres with a rim width of 20 millimetres or more, which can also withstand hard use.
