Load/Speed Rating Duratrac

I'm about to buy a set of Goodyear Duratrac's (265/70/17) and I need to know what I need for Load and Speed Rating on my 2012 DCLB TRD. The options are:

Either E10 (Load Rating) with 121Q (Speed Rating) or C6 with 112Q

I do not tow any trailers nor haul anything really heavy in the box.

Any advice to what these ratings really mean and what I should get would be greatly appreciated.

Sorry if this is a re-post but I've looked for the info and can't find it (I might have skipped over it by accident)

Thanks!

 

Go with the C load range. The E load will be a very stiff ride.

 

Thanks...ya I did a bunch more reading and made sense of it all.