RE-gear for true 33"

yeah... 33s on a 4x4 reg cab nice!!! but 16.5mpgs??? wow that sucks!!! Im running stock tires and i consistently get 24-26mpg. Im sure the 12.5" wide doesnt help either. 255/85 16s are 1.5-2" narrower which would probably make a difference maybe 18-20mpg??? i think i might go with 235/85 16s which are 32"x9.5" 16" 1" taller than stock, 1" skinnier than stock so you get a little added ground clearance, added traction, and no change in gas mileage (even though taller they are skinnier same rolling resistance)

 

I thought it was also ground pressure. Same weight less area = more ground pressure making it conform to the terrain better.

It's certainly better to have wider in sand and to my understanding wider could also be better for some of the more shallower mud but in the mud competitions many use the tall and skinny tires to get to the bottom of the deep mud hole where the ground is better for traction.

Here's a really good link on tire info

http://www.expeditionswest.com/research/white_papers/tire_selection_rev1.html

 

When aired down the footprint increases length wise of the tire much more than it does width.

 

This is probably way off the subject.. but I have 35" tires 12.5 wide. I want to get re-geared to get my towing capacity near what it was stock. My issue is i dont have any idea what I should get as far as ratio goes. I know the higher i go better tow, lower better gas from what I understand . Its my every day truck so technically I want the best of both worlds. Would you guys reccommend 4.56 or 4.88 or something completely different? Any brand you reccommend??

 

Yeah I got the 35s and need help! what gear ratio should I get? TOw and everyday truck

 

4.88s are a good way to go...

yukon, precision, are great brands...

 

You dont think my rpms would be too high on the highway during regular driving?

 

35/30.5 = 1.15

4.56/3.73=1.22
4.88/3.73=1.31

4.56 should be plenty IMO unless you want super Rock crawling powers.

 

shouldnt be too bad with 35s, but you do have that bigger motor...

Steve aka Bajamoon is runnin 35s.. let him chime in...

you may end up spinning tire depending on your driving style...

i recall one of the boys runnin 4.88s on 33s on a 3.4 and he was rippin up tires on road...

 

nope dont want to climb anything but a grade with a trailer attached to me. 4.56 should be adequate then right? 4WP is saying the same 4.56 but I wanted to check with you guys with the actual truck.
Anyone know of any place that will install in SOCAL other then 4WP? I am thinking to go with Precision, 4WP ha s their brand G2. Any feedback i=on those?

 

yah, don't do the 4wp branded ones...

how much are they charging you?

if you have the parts, you can get the labor done for as low as $350 but you would have to take the third member out yourself and drop it off... if you take the whole truck, the labor jumps up...

i went to Red's Differential in Lakewood and they wanted $900 parts and labor...

PORC offers some member discount to TTORA members...

you can also call Hassim at Engage Offroad for package prices too... 909-238-6788... tell him you are a TW member and Mohawk Mike gave out the number...

 

Pretty much this...for unstable soft surfaces (sand, snow, loose dirt, mud) a wider tire is preferable to allow more surface area, more friction, and thus more GRF to help actually move the truck...

...But on hard and uneven surfaces (hardpack dirt, rock crawling, etc.) a slimmer tire will force tread into ground irregularities and allow for better "keying" of the tire. In theory. This assumes even spacing of ground irregularities, which is probably a folly assumption.

Personally, I'd go with the wider tire and air down. Seems more versatile for a larger number of conditions.

 

its actually ground pressure

p=f/a

pressure equals force over an area...in this case, the weight of the vehicle over the contact patch of the tire.