The Limited Edition Blacklabel 309/289R XC wheelset is designed to push the limits of aggressive XC/Trail racing and riding. Thanks to a new low profile and wide channel rim riders will notice increased cornering speed, direct power transfer and improved compliance. The Reynolds/SUNringlé Super Bubba X hubs are fully CNC machined resulting in an ultra-fast 4° of engagement for quick and intuitive power delivery. The IDM (Impact Dispersing Matrix) rim construction delivers industry leading impact resistance and durability with a lifetime warranty. In Limited Edition Turquoise anodize, the Super Bubba X features 4° of engagement and a drop-in ratchet ring design for enhanced durability. Each of these wheelsets is laced with Sapim CX-Ray spokes and alloy nipples to keep things light and strong out on the trails. 309/289 XC features a 30mm internal width front rim paired to a 28mm internal width rear. Wider rims allow you to run lower pressure, increase traction and add precision to your steering. However, wider rims can also result in a less compliant and bumpier ride. To avoid the latter, the rim profile has been reduced to 21mm. By reducing the depth, overall compliance and comfort has improved, while simultaneously offering all the benefits listed above that come with a wider rim. With most of the rider weight and power on the bike being transferred to the rear, a 28mm wide rim paired to 28 spokes creates an ideal balance between strength, comfort and performance. On the front, the rim has been widened to 30mm to add even more steering precision and sidewall stiffness where it matters most. To maintain a similar feel to the rear, the spoke count has been decreased to 24 to add compliance and reduce weight for a more flickable feel while navigating the tight and twisty sections of the trail. 'IDM' stands for Impact Dispersing Matrix, a combination of high-quality carbon fibres and a unique resin with exceptional impact dispersing characteristics. Used in the Blacklabel 309/289 XC and DH wheels it optimizes the layup schedule to improve impact strength, tune ride quality and achieve very low weights all without sacrificing durability. With durability proven on the WC downhill circuit the IDM material stands alone in its strength to weight ratio.