I was wondering what tire size you guys are running on the back of your minisprints.
I have 84/12.0-13 rr and a 78/10-13 on the left. Also the option of
82/12.0-13 rr and a 74/10-13 on the left.
Thanks,
Bob

Either will work depending on a lot of factors; I got several 84's pretty cheap as Chili Bowl takeoffs so I gear my car accordingly and match the LR to get the stagger I need. 8 inches on your 82/74 combo is a healthy amount of stagger, but would be appropriate if you're running a smaller track with tight corners. 6" of stagger like the 84/78 set is closer to what I normally run, and as I said you can gear for whatever diameter you have to get the correct RPM at the end of the straight.
Keep in mind that what it says on the sidewall isn't necessarily what it will measure; I have an 84" SP-3 that rolls out closer to 82-1/2 @ 10 psi and an RD-12 that's closer to the stated dimension. You can also stretch a tire (if you need a bit more than 74 on the LR, for example) by putting 30-40 psi in in and setting it out in the sun.