I can measure and get back with you this week... Trailer is in storage... I was just up there yesterday too...damn... it’s about 5 inches between the plates... 8.5 trailer...
Just so you know what I did for maximum room/ walk through space is lined the outside bikes up first with clip ones close to wall then mounted the center plat last exactly in the middle.... you can walk through with no issues...
That trailer has the best a/c,best music,and most bestest cook in the pits!! Marc knows how to do it,and an awesome friend at the track!!
It will work fine....you will have more room than you need.. just keep in mind if you have long bars on a bike AKA Sx ect you will need to keep the front turned on the side spots... You will have plenty of room...
It will be fine... in the pic look at the space between my clip ons... and I like them Waaaay out MX style...you could probably do them 3 inches apart and they will work.. Also they are FAT TL’s too...lol