Downhill Bar is built using 7050 Aluminum alloy for strength and long life. Featuring a 65mm wide clamping area designed to work best with Thomson's Direct Mount stem. Its 31.8 center section is absolutely straight over a width of 90mm. The long straight section in the middle reduces stress concentrations, especially when using wide Direct Mount stems. Best used with stems that are compatible with 65mm clamp area Attributes: Defined Color: Black Material: Aluminum