This wheelset is suitable for bikes with a front opening gear of 100mm/3.94in and a rear opening gear of 135mm/5.31in. The taki of the rear wheel is suitable for 7, 8, 9, 10, 11, and 12s cassettes. One spacer is required for 8-11s cassettes, three spacers are required for 7s cassettes, and 12s cassettes are directly installed.