53mm- just about the perfect size for most types of riding. 101a durometer hardness, so, as hard as they could be, fast and will last a long time. Conical in shape which means that they are like a wheel which has hit it’s perfectly worn in sweet-spot, but, right out of the gate! -DB
NOTE: New wheels deserve new bearings. Add bearings to your cart and specify in the notes when you check out if you would like me to press them in for you.