Thread: 18in tyres for Disco4

Originally Posted by letherm

So, I get the new rims fitted with 265/60/18 tyres on Friday and swap onto those. Is there anything I need to do out of the ordinary. For example, I want to get a wheel alignment done

From my experience, if the wheel alignment is good, don't touch it. Took me four attempts at different places to get a good one so I'm leaving it until it actually needs one; either for suspension maintenance or actual symptoms (eg uneven wear or something noticeable at steering wheel).

I've recently swapped from Compos to Tuffants to LR 19s (exclusively city commuting for the last few weeks) without any changes to wheel alignment and without any issues. Drives nice and straight with even wear regardless of wheels fitted.

Cheers,
Scott

Originally Posted by letherm

From previous reading the speedo will be more accurate but I don't really need to use my GAPIID tool to reset the CCF.

My RRS (D3 equivalent) runs 255/55R18s as standard and for the past 6 years I have run the D3 size 255/60R18. These meant that my speedo under read by about 3kph at 100/110kph. Not enough to worry about. Now going to 265/60R18 it will probably under read a further 3kph which is a little worrying.

Now I understand that an adjustment for tyre size can be input into the D4 system but what about the D3/RRS, is there anyway an adjustment can be put into the system via something like a gap tool etc to compensate for the bigger tyres?

Thanks

Garry

I've added the 265/60 R18 numbers into the CCF via GAP for my D4 but it made no difference to the speedo. There is also a section that allows you to input the rolling circumference but it only goes up to 2260mm whereas the number I've calculated for those tyres is 2435mm. The only thing I've been able to do is make the cruise control speed equal the speedo. If you somehow find a way to alter the speedo I would love to know how!

Originally Posted by rocket rod

I've added the 265/60 R18 numbers into the CCF via GAP for my D4 but it made no difference to the speedo.

I have a site that gives, among other things, rolling diameter of tyres and the difference between 60/18 and 55/19 was 38mm. I have included a link below. Be aware that they talk MPH not KPH. Some have reported more accurate speedos with 60/18 tyres hence my comment. As we know the LR speedo understates your speed with oem tyres so this should still keep within speed limits provided you stay below the speedo reading. Time and experience will tell I suppose.

Tire Size Comparison

For those who replied to my post - thanks. Logically to me I didn't think it would be an issue but best to be sure.

Martin

For the record my ko2 265/65/18 on the D4 with cruise control set at 100kph on dead straight road recorded a real speed of 99.4 kph on a navionics gps based iPad. Tested for of kilometre and other speeds so I don’t intend to recalibrate anything with ID tool. Now what speed it says is what speed it is. Been passed by plenty of highway patrols sitting on the new 100 kph speed and no issue.
And they are noticeably noisier then the grabber ATs they replaced. But they look great and give me serious confidence. Previous set on a Prado was 100000 k and no punctures period. This included a cape trip. However had toyo AT 2 been available in this size and in LT I would go the latter as there quiet as at all speeds. If I ever wear these out I’ll try their new Toyo rugged terrain in this spec. Each to there own though.

Originally Posted by garrycol

The other tyre is the Nitto Terra Grappler G2 These are $261 - so any recommendations?

So anyone know of another 265/60R18 LT tyre that is OK and reasonably priced.

If not, I might go the Nittos.

thanks

garry

So after careful consideration of a number of different tyre threads and comments here I decided that a reasonably priced AT that was LT or at least 114 Passenger or XL grade would be suitable.

I went to the Monsta dealer and had a look at their AT tyre and it certainly looked and felt OK but whe I asked for the fitted price he asked if I had seen the advertised price ($224) and I said no - he then quoted $250 a tyre which I thought was a little high so went around to Bob Jane to have a look at the Nittos.

The Nittos tread is more at the HT end of the AT range so i guess that is why they are supposedly quiet on the road. But like the Monsta the sidewalls felt pretty strong so seemed reasonable for the price - reviews on a range of forums rated them pretty good.

Already knowing their price of $261 I once again asked for the price from the guy I was dealing with - he went to the console and said $261 but if you buy 3 you get the 4th free - but quickly said sorry that offer was no longer available. I asked when the offer had closed and he said that might still be able to get it - so I got 4 x tyres for $195 each.

So now have Nitto Terra Grapper G2 265/60R18T fitted. New they are quiet and I guess only time will tell how they work out but the reviews are good - for the price certainly worth the gamble and better that paying double for the BFGs which dont actually have great reviews.

Cheers

Garry

Originally Posted by LRD414

From my experience, if the wheel alignment is good, don't touch it. Took me four attempts at different places to get a good one so I'm leaving it until it actually needs one; either for suspension maintenance or actual symptoms (eg uneven wear or something noticeable at steering wheel).

I've recently swapped from Compos to Tuffants to LR 19s (exclusively city commuting for the last few weeks) without any changes to wheel alignment and without any issues. Drives nice and straight with even wear regardless of wheels fitted.

Cheers,
Scott

I’ve been doing the same. I have 19s with HTs for town and Compos other times.

I had a set of Michelin LTX Force 265/60/18 fitted on Friday to my new compomotives that I bought from Gordon. Running pressures of 41F 40R atm. Obviously very early days but so far I am pleased with them. Ride is good and I would say will give swmbo a more comfortable journey which was a major factor for me in moving to 18" and buying the Michelins. Handling is very good with excellent response and goes around corners very well. All up, a step up from the oem 19" Goodyear Wranglers in every regard. No wet weather drives yet so no feedback about that. It was a punt to buy the Michelins but so far, I'm a happy camper.

Only downside is that one of the oem hub caps has departed the scene. I have some black ones with LR name on to install so not a big issue but would have liked the full set of originals to keep on hand. Funny thing is I tried to pop one out on another wheel out but it wouldn't, even though it was a bit loose. From memory someone suggested a dab of silicon to hold them in place as the diameter of the compomotives hub cap opening is ever so slightly larger than oem LR rim.

Martin