I need front width (A ) , rear width ( B ) and length ( C ) of seat pan ( flat seating area ) . My tails are between 8 1/2 to 9 inches long depending on the size of seat pan i am making for you. To get the total length of your seat just add 8 1/2 to 9 inches to your seat pan length . This will give you a good ideat of where the seat will be on your bike. Any question just e-mail or call me to go over dimensions.