I was just looking at HDL's sale and they have 2 different part numbers for the Bridgestone G709 front tires on their page. one is a BRI-122971 @ $152.43 and the other is a BRI-BR7055 @ $139.99. They are both listed as the same size tire 130/70R18. Does anyone know the difference? I purchased the $139.99 tire on my last 2 replacements and they go around 20K miles for me. Just wondering.