Thread: 19" Scorpion ATRs fitted on the D4 today.

Originally Posted by petera

my silent armours 265/60/R18 wont fit in the spare area unless i remove the hitch.
Cheers,
Petre

Peter, just to clarify, the silent armours do fit ok once the hitch is removed? I ask because I've got a D4 coming and think I'll go with these tyres.

Cheers.

Originally Posted by WhiteD3

Peter, just to clarify, the silent armours do fit ok once the hitch is removed? I ask because I've got a D4 coming and think I'll go with these tyres.

Cheers.

they do fit into the spare recess once the hitch is removed. It is the same degree of difficulty as putting the OEM 255/R19 Wranglers in once the hitch is gone.
I am so far happy with SA's except for gouge as posted previously, but to be fair, i think it could happen with any tyre.
Cheers,
Peter

I had 19" ATRs on my D4. The trick is to keep the wheel sloping up at the back to ensure it doesn't catch, both when raising and lowering. Even my 30.8" LT245/70-17 Yoko A/T-S fits but needs the rear to be up behind the hitch before the front is wound into place.

Originally Posted by Graeme

I had 19" ATRs on my D4. The trick is to keep the wheel sloping up at the back to ensure it doesn't catch, both when raising and lowering. Even my 30.8" LT245/70-17 Yoko A/T-S fits but needs the rear to be up behind the hitch before the front is wound into place.

Thanks Graeme,

Tested the tyre retraction winch (winder) and it works OK now. However, I couldn't get the tyre to go down...as it got stuck between the hitch and the exhaust guards. No issue...probably muck with the tyre a few inches at a time or take the hitch off. If you had two people you may be able to move the tyre up and down easily. Or you could 'adjust', as others have, the tyre bay.

Anyway....I then thought about tyre pressure...as others have said that they needed to decrease for larger tyres. I have been trying to work out the ride difference between the Wranglers and the Scorpions....the Scorpions feel 'firmer'. I figured that was the carcass strength but wasn't sure.

I've got a run of the mill tyre guage and one fitted to my compressor. Neither are top-end but both read in the same range. I checked the tyres, and they are all at 40-42 PSI. It states quite clearly on the tyre that you should not exceed the MAXIMUM pressue of 40PSI....and this is with cool tyres and unloaded! Not happy Jan....

So....tomorrow's conversation with the tyre guys tomorrow aside....what range of pressures should I run these tyres on?

For example, Wranglers:

Super soft sand < 20 PSI

Soft sand ~ 20 PSI

Normal - As per the placard - 33 & 36 PSI

Heavy - As per the placard - 36 & 42 PSI

Thanks in advance.

Regards,

Kev.

Originally Posted by Celtoid

It states quite clearly on the tyre that you should not exceed the MAXIMUM pressue of 40PSI

I haven't checked my ATRs but I'm surprised at the max pressure as I thought they were 50 or 51. Are you sure that pressure isn't for seating the bead? If I remember, I'll check mine tomorrow.

Originally Posted by Graeme

I haven't checked my ATRs but I'm surprised at the max pressure as I thought they were 50 or 51. Are you sure that pressure isn't for seating the bead? If I remember, I'll check mine tomorrow.

Oops. that has just probably saved me an embarrassing conversation....

Thanks mate.

Just looked again...at the 'small print' on the tyre. It isn't very clear what they (the manufacturer are getting at) but in light of what you just posted, I think you're right....I think they are fitting instructions only.

There doesn't appear to be any other pressure guidance other than the suggested 'follow the placard'. Obviously was concerned that a one size fits all concept, may be flawed.

Either way, it seems that the tyre pressures that I have are a shed load higher than the placard.

So can I just apply the same range of pressures as the Wranglers?

Appreciate your help.

Regards,

Kev.

I run my R18 scorpions at the placard pressures. Great ride, even wear.

I used the placard pressures for the ATRs. I have the LT 17s at the same pressures and will monitor how they wear.