The Mach1 CFX silver rear wheel is an excellent rim if you are looking for a road wheel with an excellent price/performance ratio. The Mach1 CFX rear wheel is a wheel that will offer you safety and performance no matter what type of road you are driving on.It\'s a strong wheel, made of 6063T6 Alloy aluminium, with 20mm of profile, mounted with a sealed hub. This wheel has a machined sidewall, so it\'s compatible with all brake calipers.It\'s size of 700c, is compatible with all the wheels of road bikes. The tyres recommended are from size 700cx25 to size 700cx35. You will need a 48mm inner tube. And you need to mount a rim tape between the rim and the inner tube to prevent and reduce punctures..