So I am running Toyo T1R all the way around (255/30/19 front, 285/30/19 rear). I need to replace the rears but the fronts are still fairly new and dont need to be replaced yet. Im thinking about changing up to a different tire but not sure what yet. Can I run the toyo's up front and a different brand in the rear without any issues? I would match up the fronts when they need to be replaced.

 

Replace with same. Seems new rears/good fronts will end up wearing out about the same time.

 

If you get the right sizes, you'll be fine, as long as they're the same left/right.

 

correct answer will be keep the same

but I would try a different brand

 

there are enough people who have had vdc issues running different tires that I wouldn't recommend it. If you are lucky enough to pick tires that have similar traction levels then you can get away with it.

 

Every different tire in every size has different parameters!
Notice that every tire in testing produces different test results [see tire rack tests].
In the same size on the same test car Wet panic braking can vary from 88 to 120 feet from just 50 mph [Dry braking is usually a narrower spread].

If you find the closest match [without regard to cost] across the 6 different tests you probably will be ok unless you drive at the limits.

Since the fronts are designed [more front weight] to understeer for safety the rear quality [no spin out in wet] is the place for best quality. As most people can handle progressive understeer.

http://www.edccorp.com/library/HveWpPdfs/WP2001-4.pdf
http://ddl.stanford.edu/files/CarlsonGerdesACC2003.pdf
http://code.eng.buffalo.edu/dat/sites/tire/tire.html

It is possible to TUNE different tires by using a 1,2,3,4,5 PSI diffence in inflation pressure.

 

Yeah, not the best idea mixing/matching. Like walking around with two different shoes on your feet. Great article here Mixing Tires.

 

+1. By changing to a different pair of tires, you can upset your VDC, not to mention some possible handling changes. Our cars are more than sensitive in the VDC department. If your original tires worked for you, I would stay with them.