Tanked, they make a 345/35/18 in a pilot sport. I believe they are27.4" tall (about 1.2" taller than the 335/35/17.) You will also have to get a speedo calibration box from Unitrax to correct for the larger overall diameter.Tanked said:I'm looking a tire size for my acr. I want one that has a little more sidewall. Something like a 345/45/ZR18. And for the front a 275/40ZR18 Anyone know if someone makes these sizes. I check tirerack.com but they didn't have that size.