Now this RockShox Judy Ultimate is in their Explorer setup which means that this is a gravel specific front fork from RockShox and something that we're going to begin to see a lot more common as gravel bikes continue to get more rowdy and rowdier Now this is e-bike approved should your gravel bike be electronic but in the setup that we have here this particular one is a 40mm travel suspension so this part is going to go up and down 40mm you can get it in 30mm as well and on the topic of 30mm the stanchion diameter of this fork is 30mm