Tire Question

[Entropy455]

Tire question:
I’m interested in purchasing an M923 or M923-A1. The M923 comes with 11:00-R20 tires, and the M923-A1 comes with 14:00 R20 tires. I understand that aftermarket gear ratios for Rockwell Axles are not readily available – thus to obtain faster cruising speeds, folks often install taller tires.
How large do people normally go with the duals, and also with the super-singles (A1 & A2)?
How much do replacement tires cost? I’m assuming that replacement tires should meet or exceed the factory ratings. However I’m embarrassed to say that I have no idea how commercial truck tires are rated, or even where to purchase them.
V/R
Eric.M
US Navy Veteran

 

[indy4x4fab]

Give me a call when you are able to and we can chat. My number is in my sig line.

 

[emr]

Look it up on the search function here, there are about a gazzillion threads on this Good luck, after some searching fine tune your questions and u will learn alot more, All the best and good luck...

 

[gimpyrobb]

1100s dual(maybe 1200s), 395 and up singles.

 

[Vintage iron]

You are suppose to get 1.5 mph per inch over stock tires. So If you have 42 inch tall 1100R20 and go to a 52 inch tall 1600R20. That is 10 inches x 1.5 mph=70 mph +/-. I haven't confirmed this in my truck yet. But the bigger you go the less power you have. 1400's are the best tire for 5 tons. less head aches and just enough height. I am selling some if you need them. Like EMR said there are a ton of threads on this topic. I know I read most of them before I put on my 1600's.