Two years ago I bought a kit, skated two seasons. When I changed tires for winter, a hernia was found on the inside. I was sorry for the money, so I bought again two tires of the same brand for the front. Left the old ones on the back. At first, the tire fitters were not able to balance the wheels with the new tires at all. They said go for a week and then come back. Maybe they're rolling. I rode, but went to another tire shop. There the master also fiddled for a long time. But in the end I was able to balance. In one place, I hung a weight of 80 grams. It seems like a lot.