I also run a 60t chainring on my 20"/406 Moulton TSR-20 ... in my case, it's a 20 speed .. 60/39 up front and 11/28 in the back.. Vuelta has large chainrings in 130bcd usually in stock up to 60t.. I use bar end shifters and an Ultegra road F/D and a mid-cage R/D ..