The Black Inc THIRTY wheelset is the embodiment of an ideal lightweight climbing wheel. With a low rotating mass, it provides immediate acceleration as the grade points skyward, and the wider rim profile increases stability to carve through descents. Black Inc THIRTY’s newly developed rim shape is CFD-certified for improved stability when using wider than 25mm tires – creating a rarity for riders seeking enhanced traction, handling and comfort. The THIRTY’s profile is optimized for 28mm or larger tires.