Seriously though… the sides of the seats were a little too tight against my lower hip (against bone, not fat !), so a try before you buy ! I think I could have done with the extra 3cm the XL offers.
I couldn’t get it to go low enough without it fouling the handle for sliding the seat backards and forward.
I just used a couple of washers to get the right clearance - no big deal - I am quite short so do need to go quite far forwards as well - I don’t think it caused any ‘danger’ as regards stress and angles of force, and the seat brackets have load of adjustment possibilities, soyou can still get your favourite recline angle.