Box Four 8-Speed Drivetrain Bundle protection 35% Polyester

35% Polyester

yet fully compatible with any brake system designed for 1

it ensures ultra-smooth shifting

Perfect Fit: Designed with 2 shell sizes and 2 EPS sizes

Screen-Printed Graphics: Durable

Box Four 8-Speed Drivetrain Bundle protection 35% PolyesterBundle Up. Just like the Prime 9, the Box Four shifters take advantage of the "less is more" theme and exploit durability, simplicity, and reliability. The Box Four Rear Derailleur is the base level of Prime 9 Technology, providing an affordable, clutch based 1x8 speed derailleur that is both simple and lightweight. This makes it an ideal choice for entry level bikes. SunRace's 11 42T cassette is high quality at a very affordable price point. Shimano