On my 24" United, I have a Viscount seat. It fits me well and is reasonably comfortable for short amounts of time and distance. My question is, is it possible to convert these seats to air?
Yes, and its not that difficult, I did mine and it is certainly an improvement. Unscrew the rear bumper and and carefully peel away the cover up to the front bumper, then cut away as much foam as you think is necessary to accomadate whatever you choose to use as an air cussion, I originally used a 16’’ inner tube folded into four but found that I got frequent puntures so now use a tube out of a mountain board which is fatter and hopefuly stronger but I only fitted it tonight so am yet to find out.
Don’t cut away too much foam as its a good idea to keep the seat shape at the front and back and use something sharpe and try to remove it in one piece if you can so it can be replaced if for some reason you don’t get on with the airseat. Its worth stuffing the tube into a sock or something so it doesn’t squeeze out at the sides too much. Drill a hole near the back somewhere to stick the valve through then glue the cover back down using contact adhesive or something that won’t stick it too fast as you might need to revove the tube in future to repair punctures.
Here’s a past thread about converting a Viscount to an air seat:
Paper route uni!
And another thread:
Viscount airseat conversion