Moose Racing offers up these aluminum read sprockets, boasting 7075 T651 with extra tempering, which reduces distortion and provides optimal thickness versus typically thinner 7075 T6 sprockets. The sprockets are 100% machined with no stamping or grinding. Optimal tooth thickness results in maximum tooth and chain contact, and Moose leaves the cleaning grooves out of their sprockets because according to the company, more aluminum contacting the chain means longer chain and sprocket life. Moose rear sprockets come anodized in black with select sprockets available in red and orange, retailing at $55.95. For more information, please go to www.mooseracing.com or call your Parts Unlimited rep.