Hope your friendly with your dentist.
Why ?
The bikes are not designed to take the extra weight/torque. I have seen it go wrong, it’s far from pretty. Please buy the E Brompton or don’t bother.
So what went wrong - what failed ?
@Rhobbs started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Why ?