The two stock sizes are 6-16 (28.5" tall) and 6.5-16 (29.9" tall). Based on your original post, I am going to assume you have one of them. If not, post the actual tire size you have (such as 235-75R16) and we can calculate the height from that.
6-16: 2759RPM
6.5-16: 2630RPM