Brompton Easy Wheels - 6mm (pair)
So smooth you'll blush just looking at them.
These Easy Wheels are designed to fit in your rear frame, and may also be fitted to current model Brompton Rear Racks (2018-) to improve handling and manoeuvrability when the bike is in "shopping trolley mode" or folded.
Slightly larger than the stock rollers (which are more like castors in design) the Easy Wheel's sealed bearing ensures a smooth roll over many different surfaces. Strong and sturdy, they are have been proven to stand up to the rigours of daily use.