IDK about Tire Rack's shaving abilities, but you can get 3% off if you go to TireRack.com from fatwallet.com. Requires a fatwallet account then about 60-90 days of waiting, then you can claim your rebate via PayPal or check. Amounts to about $30 for a set of RA-1s. Covers most of the shipping.

This is not any kind of scam. Fatwallet is a reputable deals site and I have personally gotten hundreds in cash back from various merchants over the years.