I have five of these for my kids to ride. On the first two we had 1.25 tracks and still struggled. I noticed that usually as the sleds slowed they had a tendency to push the back around and try to pass the front. I put on a set of older plastic cat skis and away they went. Too much resistance from the old steel was our biggest traction issue. Now everybody tracks straighter and spins out less, the 1.25 obviously has an advantage over the conveyor belts, but skis helped us more than tracks.