The Profile Elite 15/20 hub was created for the new era of frames and designed to be the best racing hub available. With the combined stiffness of the hub shell, oversized axle and 204 points of engagement you will have a superior gate start and acceleration out of the turns. The Elite Hub features: a true 20mm bolt-on hollow aluminum axle and cassette free-hub body. The proprietary aluminum cassette body (different from the existing Elite hub) allows you to use Profile's standard steel, Elite, or aluminum cogs ranging from 12t to 18t. Elite 15/20 means that you can use this hub with any frame that requires a 15mm or 20mm axle without using adaptors. The Elite 15/20 hub is manufactured from high grade, aerospace quality billet aluminum. Made in the USA!