Backrest is optional. I found out about a special backrest they offered from a member here on the forum. It's more horizontal and not as large as their standard one. Got it several weeks ago and now prefer it so I have the original backrest in a box. Mike (taxfree) is dead on about the miles you can ride with no butt pain whatsoever. I've had Mustangs, Hartco's, a Pera, Harley Police solo seats,etc., and the RDL, IMO, is the most comfortable, period. Russell will listen to your needs about seat height even after you send them your photos on the bike, which they must have before they make it. They have really great customer service.