Versatile, low rolling resistance and durable; The Primo Sentinel tires combines the attributes of a high performing, light weight tire with the strength of a puncture resistant tire. Available in 24", 25" and 26". Please note these are high pressure tires and fit on most metal wire spokes and NOT on plastic rims. These tires require a pneumatic inner tube (sold separately). Please make sure your rim comes with a hole for a pneumatic tire. IF NOT, these tires will NOT fit on your rim.