28x19 instead of 18. I took it out for a short trip to town to fill it up today. The temp was 96, with 57 % humidity, heat index was well over a hundred. Engine warmed up to about 190 and held till I got to the first stop light, went to 202, thru town, topped tank off w/ real 91, temp went to 215, dropped to 212 and stayed there till I got back on the 4 lane, dropped to 206, till I started wasting a smart ***, went up to 208 till I got home. Not bad, but seems like the car runs better around 190 -195.