Dodge Cummins Diesel Forum - Reply to Topic
4th Gen Tire and wheel Discussion of tire and wheel options

Thread: Ok to run 121Q tires? Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
12-06-2019 10:33 AM
Originally Posted by Cummins_Michael View Post
Is it okay to run Toyo 35x12.50R20, E Rated tires that are 121Q? I have a 3500 SRW.
That is just begging for DW and handling issues.
12-06-2019 02:27 AM
jroyster06 I just threw on some Nittos, They are a 128 load rating (Not sure if its size dependent), Load range F I think. SUPER QUIET on the road... LOOK like an MT perform like an AT. NOT the best in mud, (Not tested, just have been told) If your not off roading for fun or daily, the MT isn't needed. Thats what I like about the Nittos, gives the aggressive meaty profile but ride like a mini van
12-06-2019 12:12 AM
Wyomingite Looking to buy the same tires. My truck, being a Ď12, came from the factory with 17Ē tires rated for 3195. Same as the toyos. Thinking they will be ok, but with pulling a 5th wheel I am thinking of stepping up to a that toyo lists them as 1/2Ē narrower and a bit shorter though

Sent from my iPhone using Tapatalk
07-10-2019 11:21 PM
firemansdiesel Load range does not mean as much as the load index rating for max LB rating with truck capability of load/towing from factory.

Most 18” tires are in our truck rating with few select 20” tires. There’s only one 17” tire that meets it and that’s the Toyo Open Country MT 35” tire.
07-10-2019 11:15 PM
Cummins_Michael Thanks for the reply. That's good to know. I thought all E rated tires were made equally.
07-10-2019 10:50 PM
firemansdiesel You can run them without issue, but most tire shops will refuse to sell or mount them. Since it does not meet the factory load index rating of 124+. Atleast with my experience in my area.
07-09-2019 11:12 PM
Cummins_Michael Is it okay to run Toyo 35x12.50R20, E Rated tires that are 121Q? I have a 3500 SRW.


Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

For the best viewing experience please update your browser to Google Chrome