I have bit the bullet and bought a harbor freight motorcycle chock. It is meant for motorcycle tire size 15 to about 22. I will have to drill new holes in the adjustment area to make the Grom fit right. In my area Groms are hard to come by, so I have no physical encounter with one yet. Would one of you be kind enough to give me a measurement from halfway up on the very front part of the front tire what the distance is to the back of the back tire??? I am either getting a late 22 or an early 23. I believe it's going to be a 23, so I don't know if a second-generation distance is different or not. Please clue me in! STOCK TIRES!!! This is going to be mounted on a trailer for when I pick it up brand new to take it home for the first time so I really need to get the measurement right