Winter is coming. And nobody would know that more than our friends at 45NRTH. With winter comes the fat bike season (well, the bulk of the fat bike season anyway). So the Minnesota brand just launched some new carbon rims for fat-tire bikes. The new carbon Levitas fat-bike rims were designed to complement 45NRTH tires, but theyll work with any fat bike tires in the proper size. (Photos / 45NRTH)The internal widths of the new Levitas are tailored specifically for each wheel diameter. This creates a broad, well-supported tire profile that maximizes flotation, traction, and control for the most demanding winter conditions. The new Levitas uses a narrower spoke bed to reduce weight where possible, while still reinforcing the rim walls for strength and impact resistance. 45NRTH Levitas Rim Retail & DetailRetail: $599 (one rim, and either 26 & 27.5 size) 32-hole drill pattern for strong wheel buildsOptimized relationship between tire volume and rim width for consistent contact patch and tire profile35mm rim depthIncludes a single layer of 30mm rim tape and a 65mm valve Fits 4-5 wide tiresMax inflation: 30 psiTested to ASTM Category 3; suggested weight limit of 300 lbsLevita Rim Specifications26 Levitas RimRim Size: 26Rim Material: Carbon Spoke Count: 32ERD: 510 with washersInner Rim Width: 84Outer Rim Width: 91Rim Depth: 35Max PSI: 30Brake Type: Disc brake onlyRecommended Tire Range: 4-5Tire Type: Tubeless-readyWeight: 680g27.5 Levitas RimRim Size: 27.5Rim Material: Carbon Spoke Count: 32ERD: 536 with washersInner Rim Width: 76Outer Rim Width: 83Rim Depth: 35Max PSI: 30Brake Type: Disc brake onlyRecommended Tire Range: 4-5Tire Type: Tubeless-readyWeight: 660g45NRTH.com