Understanding Load Rating 121Q

[JL_Krawler]

Hi All,

Looking at getting some Copper Tires and I see the Load rating on the 37's is 121Q. Not sure what load range this is. And is this a good range for the Jeep JL 4 door?

thanks!

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[Bikemobile]

121 is basically “10 ply” aka E rated. Way overkill for any jeep.

I run E rated bfg at’s ob my 2 door. The ride is ok.

 

[ptoemmes]

Hi All,

Looking at getting some Copper Tires and I see the Load rating on the 37's is 121Q. Not sure what load range this is. And is this a good range for the Jeep JL 4 door?

thanks!

The 121Q is a service rating which includes the load rating (121) and the speed rating (Q). When you see something like 121/115Q the 121 is the load rating of a single tire when they are mounted as a single tire per hub. The 115 is for when the tire is mounted as a dually.

Load rating sort of replaces the older, but still in use letter rating which maps to ply ratings. Tires are made a bit differently today than the good ole daze with good ole daze ratings, but tradition is hard to break.

https://www.tirerack.com/tires/tire...liate=AI1&s_kwcid=AL!3756!3!386427243787!b!!g!!

 

[JL_Krawler]

Thanks guys! Decided to go with the 12.5 d load

 

[TxJeepers]

Yup, most of what we end running is for heavier trucks. 121-124 is typical and not designed for lighter vehicles. A nice c rated 116 would be real nice but pipe dream for most. Meanwhile, plan to run the d or e rated tire around 28 psi to make them less harsh.

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