ITEM NAME:2pcs CNC Folding Bike Easy Wheels Lightweight Stable Aluminum Alloy For Brompton Features: Material: Made from aluminum alloy material, more durable. Performance: Using big bearing for better durability and smoother rolling. Using flat type o-ring with bigger surface touching for greater stability. Compatible With: The easy wheels are designed for Brompton folding bikes. Lightweight: Full CNC machined with hollow design reduce wheel weight. Package Included: There are 2pcs wheels are included. Specifications: Item Type: Easy Wheels Material: Aluminium Alloy + Color: Black Quantity: 2Pcs Suitable For: Suitable 6mm axis Compatible: For Brompton folding bike Size: About 60 x 7mm(Dia. x T) Package Includes: 2Pcs x Easy Wheels Notes: Transition: 1cm=10mm=0.39inch 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement..Compatible With: The easy wheels are designed for Brompton folding bikes. Compatible: For Brompton folding bike. Quantity: 2Pcs. 2Pcs x Easy Wheels. Material: Aluminium Alloy +. Lightweight: Full CNC machined with hollow design reduce wheel weight.