The rear wheel of your bicycle holds the crank set for the gearing and your bike chain. Bike tyres are available in different sizes and widths, depending on bicycle type, including mountain, road and comfort bikes. Hub sizes range from 130 mm for road bikes to 135 mm for mountain bikes.
Also, measure a rear wheel by diameter, with sizes ranging from 650c to 700c on road bikes. Put new tyres on your bike to ensure safety while riding.