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 stif rear wheel to achieve optimum ride characteristics for each. The compliant front wheel improves handling and control in the turns, while a stif 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.Rear wheelInner rim width - 29.5,Spoke count - 32,Spokes - Sapim Race,Weight - 1018g 27.5 / 1048g 29,Hub engagement - 4 degrees.