I’m using 26’s and I will probably run out of gear. 120mph in fourth with 4.30’s is right around 6800rpm’s. Next will be a 27 tall tire. I really don’t know what speed I’ll trap at but it should be a couple of mile an hour faster than 118-120mph range. I may raise my limiter in 4th to 7100rpm’s but I really don’t want to spin it that high all the time with the stock bottom end and stock rod bolts. My slicks are pretty new and I don’t want to spend the money on 27’s this year but they are a must for next year.