A Moulton.

Hi @conquistador yup, I cross chain a lot. Its a bad habit which I'm trying to get out of, but its still work in progress. The front mech should be fine for a 62t, its a Moulton stock part so you can use a standard rear cassette with an 11 rather than the Moulton cassette which goes down to a 10, but isn't cheap at £280. Their cassette only works with their hubs which is another £180. Altogether, its a pretty expensive option and ties you into the Moulton prices, although it is pretty and shiny. I'd rather go up on the chainring to 62t instead as a cheaper option. It'll also allow me to use a load of groupset parts I've already got at home.

The SRAM dual drive was a possibility, but I want to be able to use my Campagnolo shifters and bits I already have. I also used to have one on the Dahon Speed Pro TT (the mango coloured bike at the start) and whilst it was good, when freewheeling it sounds like somebody is shaking a bag of bolts at the back of the bike. Its also a pain to get the rear wheel out. It needs a spanner, and you've got to unclip the box that sticks out which is really poor design and prone to damage, with the little pin it clips onto. And its not exactly light either. I think the hubs over a kilo by itself.

For Moulton info, there's a Facebook Group and a Yahoo Group which are both relatively active. But, I just went out and bought one off eBay to play with. They hold their value, thus you can try and you'll be able to offload it for a similar amount if its not for you. The Pashley TSR like the one I got is the heaviest (12kgs stock), but the price jumps up a lot for the next level, either the Moulton SST (10kgs) or Jubilee (10kgs).