Hi - I've just taken delivery of a used 2019 DS 1100 Sport, so I'm new to the fold. One of the first "mods" I make to a bike when I get it is to swap the straight tyre valves for metal side valves. I was a bit surprised to see the front tyre has a straight valve, and the rear a side valve. Looking through Google images, it seems that this is how they come stock, and not through any replacement by the previous owner. Not a problem - easy enough to change - but I'm trying to figure out the reasoning for this (if there is any). I would have thought they would both be the same.