I was looking on ebay and bid on a set of 4 eagle alloy wheels. The model is 169 and they look pretty tight. they say they're 16/7.5 and 5 lug on 100 mm and 4.5 bolt pattern. What the hell does that stuff mean? will these fit my 98 rs?

Our wheels are 114.3 mm spacing, but they do make some wheels that fit both 100mm and 114mm. I would verify what you are buying before you bid any higher, and retract your bid if think you might win the auction. I know retractions look bad on your record, but better than wasting your money.