EUNORAU Cushioned Rear Bike Seat Quick-Fasten/Release

Perfect Seat Back

I ordered this seat not as a seat cushion but as a seat back. I built a plywood attachment for the rear rail of the G20 to provide greater back support for my son, and he loves it. It is not as long as the rear cargo area on the G20/G30 so note that if planning to use as a seat. It does have a metal back plate with two threaded holes in it, it may be possible to build something a little less bulky, but this worked well.