An Engineer's Ultimate Guide To 3.21 VS 3.92 Axle Ratio

[Jedi9]

Ain't looking over 125 pages but is anyone driving 295/20s with the 3.21?

 

[theblet]

Ain't looking over 125 pages but is anyone driving 295/20s with the 3.21?

What’s the rest of the tire size?

 

[Jedi9]

295/60R20s, they weigh in at 63 lbs. I may reconsider and go to 275/65R20 and save 5 lbs

 

[theblet]

295/60R20s, they weigh in at 63 lbs. I may reconsider and go to 275/65R20 and save 5 lbs

I think you'll be ok with 295s. I definitely wouldn't go too tall because the taller the tire, the taller the tire, the lower your gear ratio will be. I'd def recommend 3.92 gears for say 35" tires. Less weight it always better too.

 

[Jedi9]

Thanks , I will limit myself to 34s

 

[CHeYeNNe71]

Ain't looking over 125 pages but is anyone driving 295/20s with the 3.21?

Many run 35's, some even 37's with 3.21.

 

[Mountain Whiskey]

Except they don't run, crawl maybe...

 

[theblet]

Except they don't run, crawl maybe...

how long you been holding on to that one?

 

[Ramfancy]

Putting the big azz mudders is a great reason to get the slow gears. One of the few….

 

[Mountain Whiskey]

I'll cut a break since he's new....

 

[Ramfancy]

I'll cut a break since he's new....

I would like to see a pic of your truck. I bet the 35’s look great.

I’m seemingly into boring grandpa HT tires anymore.

 

[Mountain Whiskey]

Going to Discount Tire Saturday to have new Wildpeak AT4s put on. The Firesones in the picture did ok for the past 48k.

 

[Ramfancy]

Going to Discount Tire Saturday to have new Wildpeak AT4s put on. The Firesones in the picture did ok for the past 48k.

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Very nice looking truck! You did a nice job on it.

When I was younger, I bought a brand new 95 ram regular cab four-wheel-drive. By the time I totaled it, I had it all tricked out. I love that truck. Had the small v8 and stick shift. Went anywhere. Now I just by runningboards and a topper, lol.

 

[SnowBlaZR2]

Going to Discount Tire Saturday to have new Wildpeak AT4s put on. The Firesones in the picture did ok for the past 48k.

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Definitely interested in your thoughts on those tires. I'm deciding between those and the R/T01 for the F-350 when the factory tires are done.

 

[Mountain Whiskey]

Definitely interested in your thoughts on those tires. I'm deciding between those and the R/T01 for the F-350 when the factory tires are done.

I'll let you know after a few miles on them. They all seem nice when brand new!

The Firestones did good. They wore well and were quiet. They have a out 47k on them and honestly might still have 25% tread life left. That is the downfall to them. Now that they are lower, they don't grip nearly as well. I just put it in 4 Auto when the road is wet because they will break traction quick.

I almost got Duratracs because they always did well on my Jeeps. They are a hundred more per tire too and I don't need that aggressive of a tread anymore.

 

[SnowBlaZR2]

I'll let you know after a few miles on them. They all seem nice when brand new!

The Firestones did good. They wore well and were quiet. They have a out 47k on them and honestly might still have 25% tread life left. That is the downfall to them. Now that they are lower, they don't grip nearly as well. I just put it in 4 Auto when the road is wet because they will break traction quick.

I almost got Duratracs because they always did well on my Jeeps. They are a hundred more per tire too and I don't need that aggressive of a tread anymore.

I really liked the Coopers I had on the Ram, but wanted to try something else. The stock tires are pretty good on the highway, but I've had to use 4wd in a wet field.

 

[mattee]

I've always been a BF Goodrich All Terrain fan but looking to try something new. I'm ready to flip a coin between the Wildpeak AT4 and Cooper Rugged Trek. My truck came with the Wildpeak at3wa from the factory but they are lower grade then true at3w. now that the new Wildpeaks came out they look pretty good to me. Local shop near me swears by Falken tires

 

[CHeYeNNe71]

I've always been a BF Goodrich All Terrain fan but looking to try something new. I'm ready to flip a coin between the Wildpeak AT4 and Cooper Rugged Trek. My truck came with the Wildpeak at3wa from the factory but they are lower grade then true at3w. now that the new Wildpeaks came out they look pretty good to me. Local shop near me swears by Falken tires

AT3W are great tires. I'm leaning towards the AT4W when I'm ready to get tires and they make the 285/55R22 that I'm looking for.

 

[spyder]

Going to Discount Tire Saturday to have new Wildpeak AT4s put on. The Firesones in the picture did ok for the past 48k.

If ya had gone with the 3.21 instead of 3.92 gear set, you'd be able to afford better than discount tires, sir. The fuel economy on the 3.21's is significant over the ninety twos.

 

[Mountain Whiskey]

Obviously just clueless. The simple 5 mph gentle breeze that bogs down your weak and feckless 3.21 gears causing you to hold the pedal to the floor trying to not get run into a ditch by the 1968 VW bug will more than make up for milage. Of course if you are accustomed to this, well, you know what they say is bliss.....