The crankbrothers tuned wheel system now includes an aluminium range. Crankbrothers synthesis wheels take a new approach to wheel systems, focusing on a compliant front wheel with a stiff rear wheel to achieve optimum ride characteristics for each. The compliant front wheel improves handling and control in the turns, while a stiff rear wheel enhances stability and tracking at speed. In the alloy range, these differing characteristics are achieved by variations chosen in spoke tension, spoke weight, spoke count, rim width, and rim weight. The range features Enduro, XC/Trail, and E-bike models, aiming to accommodate as many riders as possible. There are 2 hub options available on enduro and XCT models - a crankbrothers hub and an i9 1/1 hub, providing 4 degrees of engagement. Enduro and XCT rim only availability also gives the option for custom wheel building. The rear wheel has a inner rim width of 29.5. It has 32 spokes and is made with Sapim Race spokes. The weight is 1062g for the 27.5 size and 1095g for the 29 size. The hub engagement is 17 degrees.