The Crankbrothers Synthesis Alloy E-MTB 27.5 Boost Rear Shimano is part of the crankbrothers tuned wheel system, which now includes an aluminium range. These synthesis wheels have a unique approach, focusing on a compliant front wheel and a stiff rear wheel to achieve the best ride characteristics. The compliant front wheel enhances handling and control in turns, while the stiff rear wheel improves stability and tracking at high speeds.In the alloy range, these different characteristics are achieved through variations in spoke tension, spoke weight, spoke count, rim width, and rim weight. The range includes models for Enduro, XC/Trail, and E-bikes, aiming to accommodate as many riders as possible. With the Enduro and XCT models, there are two hub options available - a crankbrothers hub and an i9 1/1 hub, both providing 4 degrees of engagement. Additionally, the Enduro and XCT rims are also available for custom wheel building.The rear wheel has an inner rim width of either 31.5mm for 27.5/29 inch wheels or 35.5mm for 27.5+ inch wheels. It has a spoke count of 32 with Sapim E-Strong spokes. The weight of the wheel varies depending on the size - 1238g for 29 inch, 1174g for 27.5 inch, and 1181g for 27.5+ inch. The hub engagement is 17 degrees.Experience the exceptional performance of the Crankbrothers Synthesis Alloy E-MTB 27.5 Boost Rear Shimano wheel and enjoy an unparalleled riding experience.