What reduced pressures on Scorpion ATR 255/60 18?

[winaje]

Hi all. Wanting to set up my Staun deflators for the D3. Any advice on minimum pressures for Vic high country kind of work with Scorpion ATRs in 255/60 18?

Thanks

[ADMIRAL]

I have not been to the Victorian high country ( on the wish list ) but I have used the thirds rule successfully up North. If you are running 40 odd psi on blacktop, take 1/3 off the pressure for gravel, ( so mid 20'S ) and another 1/3 off for sand ( 16 to 18 psi ) In my experience the lower profile rubber works better at 16 where you may have been using 18 previously.

You really need to try a few different pressures, as each tyre/profile combination is going to work differently. Should be fun finding out.

[jon3950]

Don't go too low. Sidewalls are the big weakness in these tyre sizes so you want to avoid them bulging too much or getting pinched on rocks.

It's been a while since I ran 18"s up there but from memory I think I used to drop them about 6-8 psi from highway pressures - which for me are usually 1 or 2 psi above placard pressures. You'll need to experiment a bit as it will depend on the load you are carrying too.

Cheers,
Jon

[Bushy049]

Just a note on the stauns, iv had these for a few years and have found them to be unreliable in keeping there pressure setting. Before use give the little pole that stick out the top a pull dirt and grit jams it up and it won't work properly. I just have them set to let the tyre right down . Put them on in the same order as I take them off I watch the first tyre when it looks right I take them off in the same order, then check and adjust the last couple of psi with my gauge. Enjoy the Vic high country I would love to get over there one day

Sent from my HTC_PN071 using AULRO mobile app

[Redback]

Hi all. Wanting to set up my Staun deflators for the D3. Any advice on minimum pressures for Vic high country kind of work with Scorpion ATRs in 255/60 18?

Thanks

To give you an idea Will, I had GG AT2s in 255/60/18 on our first trip to the HC, I ran 25psi front and 30psi rear, I had 3 flats in succesion over 4 days, all sidewall strikes, we had 2 in a row the first 2 days, I managed to repair one so we could get to a tyre place 2 days later, couldn't go for a drive, back to camp, pack up go to next camp in the morning, go for a drive, another punchure:mad:

Get another tyre, put the pressures up to just under road pressures, from memory 30 front and 35 rear, it was OK after that, although I was more aware when driving on the tracks and avoided some tracks, from memory GGs are the same as the ATRs, not LT construction, so have weak sidewalls.

Baz