Lightweight Aluminum Easy wheels with pin bearing Your B will move smoothly than before and with STYLE And it is lighter and stronger than Brompton ezwheels upgrade! Features: Lighter than B upgrade ezwheels (69g vs. 76g) Dia: 55mm. (Two titanium M6 screws) Custom made durable thick hard rubber tires for perfect fit and shock absorption. Compatible with MiniMODs X-Roller ezwheel extender and Brompton rear rack (please specify during checkout, different screws required). Artistic yet lightweight design reminiscent of sport car wheels. With Industrial Pin Bearings, much better roll under load and durable. This listing is for a Pair of MiniMODs Ezwheels on E or L version Brompton. Let us know if you want for Rear Rack (R) version.