The Mach1 690 wheelset in silver is made with a rigid profile that favours the dynamics and performance of the rims. A nice vintage rim to give that special retro look to your bike. They are aluminium wheels that will offer you total safety and performance on your routes thanks to their aluminium manufacture. It\'s a wheel with 21mm of profile, mounted with a sealed hub.It\'s size of 700x19c, is compatible with all the wheels of road bikes. The tyres recommended are from size 700cx28 to size 700cx45. You will need a 40mm inner tube. And you need to mount a rim tape between the rim and the inner tube to prevent and reduce punctures..