Discovery 2a tyre up-size

[peta&rocky]

Hi all, new to the site, and owned my 2004 Discovery for about 6 months now. A couple of things to kick off with;
1. I want to ditch the 18 inch rims and get a set of 16's to suit the year of my car - the ones where each of the five spokes has the gap in them. Does anyone know if someone with that type of rim would be interested in a swap?
2. With standard suspension, what up-sized 16 inch tyre can fit comfortably under the guards?

[AndyW]

Legally I think about the most you can go is 245/70/16:( although I beleive you can get up to about 265/75/16's under the gaurds with out doing any mods.

[TerryO]

I went from 18's to 16's and fitted 265 x 70 Bridgestone 694 A/T's. They seem to be a good size for a D2 and don't rub anywhere even without a lift. You might be able to go bigger without issues but that would need to be answered by someone else.

Are they legal? not sure...

cheers,
Terry

[peta&rocky]

Thanks for some quick replies. Legal??? Well in Vic we can legally increase overall wheel diameter by 15mm making a legal up-size somewhere between a 245/70R16 and a 245/75R16 since I started with a 255/55R18 which is 737mm overall diameter. I am liking the idea of a 265/70R16 though if folks reckon they don't foul in the gaurds. Keep the ideas coming!

[twr7cx]

On my 2003 Discovery HSE, fitted with a 2" suspension lift, I have 255/70R16 tyres on a set of genuine Land Rover 16x7.0J rims. The tyres are Mud Terrains and they catch on the front suspension (the brace bar that runs from the front suspension towards the rear of the vehicle on the chasis) near full lock. They also put the speedometer out by 3km/h - i.e. so when the speedo reads 100km/h, the vehicle is traveling at 103km/h. I believe that from factory most vehicles, in order to meet the Australian requirements, usually come out with speedometers 3km/h overreadering (i.e. so when it says 100km/h your actually only doing 97km/h) in order to compensate for tyre wear. If this is the case, then my speedometer is actually 6km/h out when compared to the factory size tyres.

[Fluids]

I'm running 255/70 x 16 S/T's. No lift. They don't rub anywhere. Calc' difference is approx' 3.8% oversize ... by GPS vs speedo it's about 5km/.hr difference (ie:100km/hr on the speedo = 105km/hr by the GPS.

[jwb]

245/75-16 is fine without lifting

I run 265/75-16 with a 40mm lift. Need to adjust the steering stops to prevent rubbing on the front.

Make sure you get LT tyres.

[peta&rocky]

Thanks for some more replies.

[imatt]

Try not to go too big because it will affect your gearing. I am running 245/75/R16 Cooper ST's on my V8 auto and I noticed a difference in gearing, I believe it is more noticeable on autos. My speedo at 110kmh is almost 7kmh out according to overhead advisory signs on western hwy.
Cheers Matt

[Larry]

Do you want wider or taller?
Mine has 235/85/16 BFG All terrains, with a 2" lift though. Need to add 10% to what the speedo says. :angel:

[peta&rocky]

Thanks for your reply Larry. I guess I'm after something just a bit taller (greater overall diameter) without going stupid. I'm well aware of the effect on gearing and speedo accuracy. I can live with those compromises. Going for a tyre narrower than specified on the tyre placard could also present a legal issue - I'd have to check my reference material to be sure on that one though.

[Capacious]

245/75-16 is fine without lifting

I run 265/75-16 with a 40mm lift. Need to adjust the steering stops to prevent rubbing on the front.

Make sure you get LT tyres.

Is this easy enough to do? And is there a 'how to' anywhere?

I have just bought 265/75/16 and will need to do this pretty smartly!

[twr7cx]

Need to adjust the steering stops to prevent rubbing on the front.

That widens your turning circle a bit right?

[FISHGUTS]

The old 'tyre up' scenario. There is a plethora of replies to this subject and a very good tyre calculator somewhere in the D2 thread. I went for 265/75R-16 Kelly Safari MSR which I picked up from the Markets here on the Forum. The Kelly's are not true 265's as they were a lot narrower than the 255's I took off. I read somewhere that the company had changed their formula to allow better fitment or some such rubbish. Anyhow I also picked up 8 x P38a 3 spoke genuine alloys from the Markets thread as no one at the time was up for a swap. I eventually sold the 18" tyre/rims using local advertising and this Forum. The only place they (one of them) rubs is the front left (brand new others part worn) trailing arm but knowing it does that I simply don't use full left lock unless really necessary.
Hope this helps.

Cheers,

Peter.

[LOVEMYRANGIE]

Try this link. http://www.exploroz.com/Vehicle/Tyres/SizeCalc.aspx

Put in your original size then use other combinations to see what's close.

Cheers

Andrew


Sent from my backyard TeePee using smoke signals.

[disco2_dan]

On my 2003 Discovery HSE, fitted with a 2" suspension lift, I have 255/70R16 tyres on a set of genuine Land Rover 16x7.0J rims. The tyres are Mud Terrains and they catch on the front suspension (the brace bar that runs from the front suspension towards the rear of the vehicle on the chasis) near full lock. They also put the speedometer out by 3km/h - i.e. so when the speedo reads 100km/h, the vehicle is traveling at 103km/h. I believe that from factory most vehicles, in order to meet the Australian requirements, usually come out with speedometers 3km/h overreadering (i.e. so when it says 100km/h your actually only doing 97km/h) in order to compensate for tyre wear. If this is the case, then my speedometer is actually 6km/h out when compared to the factory size tyres.


actually, changing puts your speedo out by a percentage not by a set number, ie when your doing 100kmph and you say your doin 103 then at 20kmph its not doing 23, also if what you say is right then your speedo should be bang on not 6km out...

[Slunnie]

Try this link. It is specific to Disco2 oversize tyre fitment.

Clifton Scientific Text Services, the Netherlands (http://www.clifton.nl/index.html'tyresizes.html)

[TD50WA]

http://www.aulro.com/afvb/discovery-2/158431-aftermarket-wheel-options-d2-2.html

As per my post #20 in the above thread, a tyre calculator gives a standard measurement for a given tyre size. This measurement does not necessarily relate to the actual tyre size as manufactured.
Line a given size tyre up with different brands and you will see a difference in size even though they are marketed as a given size and should be all the same.

Standard fitment for a 255/16 is anywhere from 737 - 742. See link in my other post. There are a couple of major brands that list the larger size, so they are not unknown cheapo tyres.

For those who want to stay legal without going to the hassle of engineering etc, the 275/70/16 would be ok as it comes in at 49mm over the 742. (For those states who follow the 50mm rule -which is everyone except NSW ?)...IMO.
I have run 265/75/16 mtz with no lift and only very minor rubbing on full lock, and the mtz is a full 32" @ 814mm, most other 265/75/16s are 31.6 etc at average 807mm.....another example of not all tyres of a given designation being the same actual size.

The only problem with the 275/70/16 is that all terrains are common, but only Silverstone does a muddy in that size. Maxxis makes one but doesn't bring it to Oz.

Cheers
Kev

[gavinwibrow]

Hi Kev, I too am grappling with sizes for the next set of tyres. Question/s below.

1 Not being picky, but is 275/70 comment re being 49 mm oversize correct? I make it 31.2 inches from the chart, or more than 50 mm/2 inches oversize. Also would that not be very wide and cause issues with the bump stops/turning circle?

2 As far as I understand the standard size for D2 is 235/70/16 [D = 28.95 inches] - but I have the OEM/standard classic issue D2a MY04 Classic 16 x 8s on mine from new (ex RR?) fitted with 255/65/16 [D = 29.05] anyway, so I may be talking out of my hat.

Hope I'm not crashing the thread, which I know has been done to death before.

3 I'd like the largest legal (up to 50 mm oversize) size that will definitely NOT cause any rubbing. I have standard rear springs, standard Bilsteins and oldish 40? mm overlength front springs which just compensate for the weight of my bull bar etc. My auto is mildly chipped and with a HD torque converter so I can handle the lower acceleration even when towing. But I do want tyres good in the wet, don't want muddies and do want the quietest I can get - existing MAXXIS have done well/are quiet. Would like Pirelli Scorpions, but they don't come in the right sizes now in OZ. Bridgestone 697s might be a goer? Don't know anything about wet weather performance of Goodyear Duratrax (recommended by Tombie) or Wrangler Silent Armour.
Looks like I better go to talk with guru Lyall at Custom TyrePower in Kenwick.

4 I would not mind going to a skinnier tyre as long as it was OK on 8 inch wide rims, was available and didn't look rediculous.

[TD50WA]

Hi Gav

The tyre placard in my disco lists the various sizes including the 255/65/16-
the DGT 3 is 743 mm, the Silverstone 117ex 275/70/16 is 792mm which is 49mm difference. Most of the 275/70s were the same size, but as I said, different brands may, and probably do vary in size, ....
I do not rely on tyre calculators at they give a result that a tyre mathematically SHOULD be, not what they actually are.

I know my 265s rubbed on the inside at full lock, But only just and that was without a lift, apparently adjusting the steering stops prevents this....but they are illegal size.....maybe a 265/70/16?

The 275s will definetily rub I would think, unless you get aftermarket rims with different offset.

All terrains have a greater choice of tyres, muddys are limited to 245/75/16, 265/75/16...... Except the Silverstone as I said. This is the only muddy I could find in Oz
I think a 265/70/16 in all terrain with very minor adjustment to the steering stops, or a 245/75/16 in a muddy fulfills your requirements based upon tyre size availability in Oz.
If you want to get other rims, then the silverstones as above or any all terrain in the appropriate (real not calculated) dimensions will fit.

When I've finished a few other things with my car, I'm going to pursue getting 32s legal, as 265/75/16 is a readily available size....

Bloody tyres!

Cheers
Kev

[Rok_Dr]

Gavin

If I recall you have the country classic edition and your rims were a special fit for that model. They are 1" wider than the standard 16" rims, (8" vs 7") and land rover fitted the wider 255/65 tyres to them. I personally think they're a v nice rim and wouldn't mind a set on my disco:):):)

In my case I have 245/70s, just a little wider and doesn't throw the gearing out.

Cheers

Steve

[TD50WA]

Love those Alfas....:D

[Slunnie]

Gavin

If I recall you have the country classic edition and your rims were a special fit for that model. They are 1" wider than the standard 16" rims, (8" vs 7") and land rover fitted the wider 255/65 tyres to them. I personally think they're a v nice rim and wouldn't mind a set on my disco:):):)

In my case I have 245/70s, just a little wider and doesn't throw the gearing out.

Cheers

Steve

Disco2 came standard and optioned with 16x7, 16x8 and 18x8.

[Slunnie]

3 I'd like the largest legal (up to 50 mm oversize) size that will definitely NOT cause any rubbing. I have standard rear springs, standard Bilsteins and oldish 40? mm overlength front springs which just compensate for the weight of my bull bar etc. My auto is mildly chipped and with a HD torque converter so I can handle the lower acceleration even when towing. But I do want tyres good in the wet, don't want muddies and do want the quietest I can get - existing MAXXIS have done well/are quiet. Would like Pirelli Scorpions, but they don't come in the right sizes now in OZ. Bridgestone 697s might be a goer? Don't know anything about wet weather performance of Goodyear Duratrax (recommended by Tombie) or Wrangler Silent Armour.
Looks like I better go to talk with guru Lyall at Custom TyrePower in Kenwick.

4 I would not mind going to a skinnier tyre as long as it was OK on 8 inch wide rims, was available and didn't look rediculous.

Re the Pirelli, they don't sell the full range in Australia. You can bring them in cheaply and often cheaper than purchasing locally. I really wanted the Pirelli ATR but they didn't have them in Australia in 285/75-16. Tire rack in the US had them at my work in 5 working days and then I ad them fitted.

[gavinwibrow]

Thanks Kev, Steve & Slunnie. Ideally, I think I'd like the 255/75 [D = 31.06] ie marginally legal, but they are an unusual, limited availability size. I think I'll follow Slunnies idea and import 6 of my own once I determine size and type.

[wardy1]

Do you want wider or taller?
Mine has 235/85/16 BFG All terrains, with a 2" lift though. Need to add 10% to what the speedo says. :angel:

I have the same with what was originally a 50mm lift, probably sagged a bit but no clearance problems ever.

[rstevensen]

good morning everyone, I thought I would contribute with a find last night for your consideration (see section 13.3.1)
http://www.victoriapolice4wdclub.org.au/Notices/VSI%20No%208%20Guide%20to%20modifications%20for%20 motor%20vehicles.pdf