275/55R20 KO2 or LTZ

Forever hopeful and clutching at straws I have now removed the very tinny-sounding gearbox shield. However during the process I discovered that the thin metal heat shield over the bottom o/s corner seam of the right foot-well area twanged when touched as it was just touching the seam joint. The gearbox shield will be refitted with a pad of sound deadening material after the next test but I'm pinning my hopes on the other shield which has now been moved away from the body seam.

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Originally Posted by Graeme

I wonder how many of the D3/D4 bad experiences were with vehicles fitted with e-diffs that may have adversely affected the steering in such conditions. I can feel my D4's e-diff keeping the vehicle straight if the throttle is opened a little whilst steering through slushy stuff on my driveway without TC having activated.

I am very mindful of only an extra 2+ cm sidewall height over the standard size so the extra load carrying ability of the BFGs vs the ATRs (LT @ LI 115 vs P @ 111) might be significantly detrimental to ride improvement. The LTZ @ 117 may be similar to the BFG. I'm a little wary of the longevity reports of LTZ's but am prepared to give them a try.

I wont have 2 sets of rims/tyres again so compromises will be made. ATRs and LTZ would probably be the sensible choices and more than adequate for the occasional rough use but the expected extra noise and poorer handling of the BFG is probably OK too. I may make a spur of the moment decision when provoked.

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Hi Graeme.

I see you are already using LT275/55 r20's on your L322 tdv8. I went to purchase that size in LTZ's today but was told by the guys at Coopers that they will scrub in various positions. Needless to say I haven't purchased anything yet as I particularly wanted the 117 rating on the tyres that I eventually buy.

Can you tell me if you experience any scrubbing with that size tyre at all.

I also phoned our local BFG dealer and he said they don't have a listing for the 275/55/20. I'd be interested to know your supplier if that's ok.

Any info on any of the above queries would be greatly appreciated.

I have a 2008 L322 3.6 TDV8 with 20in rims.

Thanks
Steve

Initially I didn't detect any rubbing but recently found that the bottom edge of the inner guard that bulges over the fuel filler pipe at the front of the RR wheel needed the standard fix of a screw to hold it against the layer over the filler pipe itself. I regularly drop mine to the bump-stops and occasionally have moved forwards in a straight line whilst down (the front tyres rub when turned much whilst right down) so may have rubbed then, but more likely just from significant compression over bumps. No audible rubbing occurs at access height on full lock. Other AULRO members have fitted 275/55R20 Pirelli ATR without any rubbing.

I bought the tyres through ebay from Cornells Tyres for $365 + frt but they currently only have 1 left. Tempe Tyres have them listed for $420 + frt. Both suppliers must have direct-imported. They were listed to be available though general tyre outlets late last year but obviously haven't arrived yet.

I'm still trying to find the source of resonance from the tyres that's heard from the driver's seat but not the passenger's. Until yesterday I thought it was coming through the front but no noise is heard when leaning forwards so must be from the rear. I have yet to revisit the rear for a reverberating panel. My hope is that the cabin acoustics are not incompatible with the noise frequency of these tyres. Light vibration from the blocks can be felt through the steering wheel at very slow speeds, ie when barely moving.

What are they performing like in different conditions for grip? Are they ok on the Rd and in the wet?

Also just referring back to the Pirelli scorpion ATRs.
I had some on my 2010 Disco 4 SE with an Ediff.
Never had an issue in the wet ever.
Although I only experienced their first half of wear before I sold it so I'm not sure what they're like when worn down lower in the wet.

Grip in all conditions is fine for my driving which tends to be 100 kph everywhere its allowed.

Whilst looking for a used 275/55R20 for a 2nd spare I encountered new Yokohama Geolandar AT/S in this size (XL, 117S). I had a good run from the AT/S in LT245/70R17 on the D4 so with the current 4 for the price of 3 offer (effectively $346 ea) I'm considering buying 4 mostly to store for 3 years until the noisy BFGs are worn-out. However its an expensive way to get a 2nd spare so I might do well to keep looking for a used tyre.

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Originally Posted by Graeme

Whilst looking for a used 275/55R20 for a 2nd spare I encountered new Yokohama Geolandar AT/S in this size (XL, 117S). I had a good run from the AT/S in LT245/70R17 on the D4 so with the current 4 for the price of 3 offer (effectively $346 ea) I'm considering buying 4 mostly to store for 3 years until the noisy BFGs are worn-out. However its an expensive way to get a 2nd spare so I might do well to keep looking for a used tyre.

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Are they that noisy? I was thinking the bfgs next. I have the latest bfg mud terrain's on my p38, there's noise and on some road surfaces a little louder than others but overall they bother me.

Paul

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Originally Posted by Hammer H

Are they that noisy? I was thinking the bfgs next. I have the latest bfg mud terrain's on my p38, there's noise and on some road surfaces a little louder than others but overall they bother me. Paul

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Mate
A P38, your in deeper than I thought. 😀

The noise is quite intrusive and significantly worse when I'm in the driver's seat than the passenger seat. From both seats the noise seems to be emanating from the driver's foot-well area for both myself and my son when swapping seats. I think the open space below the brake booster through to the ground below is a major contributor but stuffing the void with old towels makes no difference.

Edit: I have yet to fit the 2nd spare with its standard tyre to the front right for a noise test.