Cymon
New member
These are hands down the best deflators around. Set it and forget it!
http://www.toyota-4runner.org/group-buys/219706-jt-brooks-tire-deflators-group-buy-made-usa.html
+1...these are awesome! Thanks again Chas!
Air Down Tires for Trails
- Thread starter jdotlim
- Start date
+1...these are awesome! Thanks again Chas!
Cymon
New member
Most used and "Best Buy" of trail gear I have (along with the JT brooks Deflators mentioned above).
https://m.pepboys.com/product/details/9357343/01635
I got it for $50 because pep boys always has coupons. It's no arb onboard air compressor, but it gets the job done. I can usually air up from 20psi to stock tire 34 psi in about 2 mins a tire.
It is the same compressor as the MV50 and is Sold at Walmart as well.
Masterflow 12v High Volume Air Compressor / Inflator - Walmart.com
Ray Dunakin
Senior Member
Thanks, I'll look into getting one of those.
Runner Magnetic
New member
I know lowering your PSI will improve traction and ride quality, but i've gotten used to being beat up by my toyota. :violin:
Depends on how long you run. Heat build-up is the concern because of sidewall flex. Also depends somewhat on your tire size - larger/wider tires need less pressure to make them stand up straight.
On stock sized tires 30mph should be OK for a number of minutes, and short bursts to 45 should be fine. I wouldn't try to hit 60.
If you're worried, just stop after a short time at speed and feel the sidewalls. If they're still cool you're fine.
On stock sized tires 30mph should be OK for a number of minutes, and short bursts to 45 should be fine. I wouldn't try to hit 60.
If you're worried, just stop after a short time at speed and feel the sidewalls. If they're still cool you're fine.
Here's a couple of pictures of my '94 with 33" BFG's aired down to 20 psi. As you can see, they're far from looking "flat". We ran 30 miles on "good" gravel out to Hite from the Maze in Canyonlands before we aired up again, probably averaging 30-40mph. No problems at all. (BTW, that running board damage was done 5 years ago, not on this trip. Miscommunication between me and the spotter.)
Attachments
manesfesto
New member
I usually air down to 20psi on my 33''s and have never had the tire slip on the rim. Now that I am on 37's with headlocks I will be down to under 10psi. Probably 6-8.
The ride comfort on any sort of trail, even it being a dirt road with imperfections is well worth the few minutes of airing down. Anything above 20psi is still safe in my eyes to drive some milage to air back up.
Honest, I drove from Colorado back to Texas once with mine at 20psi because I had totally just spaced it after leaving the mountains. I got shitty MPG, but damn it was a smooth ride. hahah
I am a big fan of the curry tool. You can snag them on amazon for like $30
The ride comfort on any sort of trail, even it being a dirt road with imperfections is well worth the few minutes of airing down. Anything above 20psi is still safe in my eyes to drive some milage to air back up.
Honest, I drove from Colorado back to Texas once with mine at 20psi because I had totally just spaced it after leaving the mountains. I got shitty MPG, but damn it was a smooth ride. hahah
I am a big fan of the curry tool. You can snag them on amazon for like $30
Don't you lose ground clearance when airing down?
Why are the sidewalls less likely to get damaged at lower pressure?
I just drove a trail that had lots of loose rocks (up to and beyond football sized). There were scuff marks on the sides of the tires past the lettering to within a couple/3 inches of the rim. I was still running the stock tires at 32psi.
Maybe I should try the same section of trail at 20psi.
Why are the sidewalls less likely to get damaged at lower pressure?
I just drove a trail that had lots of loose rocks (up to and beyond football sized). There were scuff marks on the sides of the tires past the lettering to within a couple/3 inches of the rim. I was still running the stock tires at 32psi.
Maybe I should try the same section of trail at 20psi.
So, I can't resist a math/geometry problem. Assuming a 32 inch tire 7 inches wide, and a 4400 lb vehicle, the axle height difference going from 35 psi to 20 psi should be about 3/8 inch.
I checked using different assumptions and got small numbers like that. I have to try lower pressure when I can.
nevada
Senior Member
if im going to be more than a few minutes I air down as soon as I leave pavement.
even if im just driving on gravel forest service roads.
I found that airing down the stock Nitto Terra Grapplers to 25 psi on the TRDP worked very well for mixed rock, sand, water crossings and 35-40 mph washboards.
As for BFG AT and MT tires, I've actually removed the valve stems and run 0 psi for "emergency" sand and snow vehicle extrication. Of course, airing up after getting unstuck; but it's a huge advantage of the strong side walls.
-H-
As for BFG AT and MT tires, I've actually removed the valve stems and run 0 psi for "emergency" sand and snow vehicle extrication. Of course, airing up after getting unstuck; but it's a huge advantage of the strong side walls.
-H-
How do you have CTIS? What system is it?
4est5speed
Junior Member
IIRC, he is (was?) Running unimog axles on his 4runner, hence "4mogger". Portal hubs, ctis, adjustable air suspension, was a pretty sweet ride from what I remember on his yotatech build thread
