I agree with Shawn D. Either the seller is very uninformed or is trying to pull a scam on you. The TRX wheel has a 390mm diameter or 15.35in dia. A 15' or 16' tire will not seat on the wheel properly. Trying it will result in disasterous consequences. The archives have many posts about the TRX tires and those who have converted and gone on to better tires and wheels. Bottom line, find another E28 to buy. I wouldn't trust this seller.