I installed an X-RF5 which is now an S-RF5. There is an issue I've not yet properly resolved with it, the indicator chain pulley guide sticks out quite a bit further than the 3 speed nut type. I modded the chain tensioner so that the guide pulley sits closer in towards the axle, however it still projects out enough that when the bike is folded it sits between the front wheel spokes, so if whilst rolling the bike the front wheel touches the floor and starts to turn the spokes bang against it the pulley. The old 5 speed had a longer hook/stay thing which perhaps I should install. I get the feeling it might bend under load when the bike is used as a shopping cart though:



Oh, forgot to say, the reason the front wheel can reach the floor on my bike despite it having a rear rack and eazy wheels is because I've put a Scorcher 1.5" tyre on it.