For your next upgrade or custom build, take a serious look at the Whisky Parts Co. No. 9 Carbon Tubeless Rim. These lightweight yet strong 27. 5 carbon fiber rims offer considerable improvements to ride quality and rolling speed compared to aluminum rims of the same width. They're a great choice for trail riding and all-mountain rowdiness, and they come in two different widths based on what range of tires you typically run. The No. 9 36w rim has a 30mm internal width that offers great support for 2. 2 - 2. 5in wide tires, though it could handle up to a 2. 8in plus tire if needed. The 40w rim has a 35mm internal width that works well for the high-volume 2. 4 - 2. 8in mountain bike tires that are becoming increasingly common on modern trail rigs, though it can handle up to a 3-inch plus tire without any trouble. Both rims feature a hookless bead for an easy and secure tubeless setup, as well as increased impact resistance to rocks and other obstacles on the trail.