They fit right in but I also noticed they were heavier right away. When you look at them side to side - they are thicker on the ends. I don't have a mm measuring device. I dialed them all the way back both the front and back and took it out yesterday. Landing jumps are great and I love the new stance. I have broken one end before but none since. I wasn't looking for these but they popped up on eBay and 40$ ain't bad assembled and filled up with 3000cst.