I got a Bell after market seat for my radwagon today and it won't be useable. I thought someone said they used this seat but there is just no way to mount it. It seems really comfy too. Who knows of an aftermarket seat that will actually work with the radwagon? The seat post is too large in diameter to even allow the new seat to be mounted. If you have one and fit it to the Radwagon please let me know.