ALBPM

I know this has been beat to death in the past
but the search function still won't go back past the upgrade.

We blame this on "Bill Gates"

Any ways I was curious to see what pressures anyone with load
range :"D" 265/75/16 REVOS is running at "On" and "Off" Road.

These REVOS are rated at 65psi at 3000lbs. I'm currently running with 40psi in them and watching the tread wear but only have about 70 miles on them.
The rear tires seem fine but I may put a few more lbs's in the front.

Dr. Zhivago

Mick (RidgeRunner) keeps his BFG AT's D Load Range at 32PSI for street use. I'd leave them where you got them for about 1000 miles and see what the treadwear looks like at that point. Off road, 17-20 PSI is where I would start.

My .02
G

4RUNR

Anybody know the weight difference between the heaviest and lightest Revos?

I got the lightest 32" 114S load and it still drives like there's an elephant in the back seat when comparing to 31" Wranglers. IIRC every extra 10lb in the wheel/tire feels roughly like 100lb in the trunk.

ALBPM

That sounds strange because the higher the tire pressure the less tread you will have on the ground. I have the "D's" and the Runner is very responsive at 40 or 50psi. It just rides a bit softer at 40psi.


P275/70R16 114S 43lbs
P265/75R16 114S 45lbs
LT265/75R16 112/109S C 48lbs
LT265/75R16 119/116R D 48lbs
LT265/75R16 123/120R E 54lbs
LT285/75R16 122/119R D 54lbs*?? from Bridgestone thought it would be heavier for a 285.

SLC Punk

When I installed and sold Duelers (pre Revo)for Firestone, we would set them between 35-40 (unless they are towing). Anything more that that will give you a really poor ride.

4RUNR

Tire pressure would only affect rolling resistance, what I'm referring to is the rotational inertia.

Imagine a tire rolling by itself, no vehicle on it, it would take more force to get a heavier tire rolling and more braking power to stop it than a lighter tire. The general consensus figure from what I heard is 1lb on wheel = 10lb on vehicle.

Exemplary frame of reference: 4000lb vehicle with 4 wheels @ 50lb each. If each wheel were to weight 60lb, that is 40lb extra on the wheels, or 400lb in vehicle weight. So, essentially the 4000 lb vehicle that originally had 50lb wheels would feel as if it was loaded with 400lb if it had 60lb wheels.

Maybe I'm just

FirstToy

No you aren't nuts. That is true. Rotational weight is affected by weight of the tire/wheel.
The weight difference between my stock Dunlops and my MT/R (C load rated) is significant and I can feel it in acceleration, braking and overall handling.

It doesn't affect drivablility enough to detract from my enjoying it and I like the security and grip off road so a little weight is ok by me.

F1 cars where handling,acceleration and braking are very important- they use paper thin rubber and magnesium wheels.

I race bicycles and we use lightweight carbon fiber wheels for racing that reduce the rotational weight by up to 2 pounds. That is MUCH more noticable than weight anywhere else on the bike. You climb, accelerate and brake faster. 2 pounds off a bicycle wheel feels like 10 pounds off the bike!

ALBPM

Ok, I keyed on the "in" the tire thinking air pressure.

My Bad....hazards of having to work while browsing the Forums....LOL :pat:

Rotational Inertia!!! Yes, makes perfect sense. It does take a bit more to get these new tires rolling from a dead stop but not much.

What surprises me is to see the same (54lb) weight listed for the C and D 265/7516 and for the 285/75/16 as well.
REVO Specs

dcampen

It is the 265/75-16 E that is listed at 54 pounds, the C and D are listed at 48 pounds. Still, even the C & D are 10 pounds heavier than the OEM 265/70-16 Dueler H/T that are on my SR5.

Kings4Runner

Well just answering the main post. I have had the revos a little over a year now. I have the D rated ones and I have found that the best pressure to keep is right around 45psi for the street. The wear I have had has been minimal. At the lower psi like 35 or so I noticed some feathering on the edges of the tire but I increased the pressure and it cleared right up. (feathering might not be the right word but it explains the look of it on the very edge or corner of the tire).

ALBPM

Thanks Kings4Runner!!! That's what I was looking for.

4RUNR brought up some more interesting facts to consider besides diameter
in regards to power lose when upsizing tires.

I never realized that the weight could have so much of an effect.

I suppose based on the weight and diameter ratios you could come up with a good calculation for estimating Power Lose for upsizing tires.?.

Roadtripr

I agree on the weight feeling. The Revos with 29-30psi seems to slow things down, but it is a nice ride compared to my old at 32 psi. I might need to bump up the pressure a bit though when I see how much gas I am going through

ALBPM

I finally settled on 38 lbs in the front and 36 in the rear for my 265/75/17 D load range Revos.

Rides and handles just great and they are wearing nicely - no feathering on the edges.
I think the best thing I did was to replace the stock rims with aluminum rims that I got at Discount Tire. They weigh considerably less than the stock rims and balance much better.