I bought two of the rack-mounted version to stick on the back of a Bike Friday Haul-a-Day Elite. The part of the seat that is meant to keep the passengers' feet out of the spokes was not straight. Some of them bent inward towards the wheel and created issues sliding the seat onto the rack and got caught on the cargo bag/hammocks. Some bent outwards and then the back of my foot bumped into them. It would be nice if they were removable.
Also, the seats don't fit the bike if the top platform is installed on the back. That's more on Bike Friday, but they are intertwined companies and should be compatible.
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