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tony66



Member Since: 30 Nov 2014
Location: fife
Posts: 92

Scotland 2005 Range Rover HSE Td6 Tonga Green
staggered wheels-21" tyre sizes-rolling radius

i just bought a set staggered wheels for my ffrr 2005-they are 10.5" rear et40[21"] and 9" front also et40 -21"
all 4 are currently fitted with 295/35/21 tyres-of which i can maybe scrape a pair to use

what size options are possible or best to use with those widths..i know 21" not overly common to keep rolling radius similar
any pointers?

Post #302103 31st Dec 2014 6:02pm
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stan
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oh dear.......... don't fit them they are incorrect wheels for the FF...

my advice is to only fit OE wheels as they are capable of taking the FF's weight.. ... - .- -.




Y. O. L. O.
.

Post #302105 31st Dec 2014 6:24pm
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tony66



Member Since: 30 Nov 2014
Location: fife
Posts: 92

Scotland 2005 Range Rover HSE Td6 Tonga Green
wheels

yes-they came off a disco with a dress ...but are they not around same weight?
is 10.5 " just too wide for the ffrr-i dont mind keeping them stacked up for when a sport crosses my path tbh if they just wont fit-but if they do it would be nice to get them on-advice regarding correct wheel is recieved though...

Post #302106 31st Dec 2014 6:35pm
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Cam-Tech-Craig



Member Since: 03 Aug 2011
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England 2015 Range Rover SVAutobiography SDV8 Loire Blue

More likely made for an X5 sir... I shouldn't think they would work on any LR Rolling Eyes

Post #302108 31st Dec 2014 6:45pm
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tony66



Member Since: 30 Nov 2014
Location: fife
Posts: 92

Scotland 2005 Range Rover HSE Td6 Tonga Green
staggered

you may be correct ...they were fitted to a rrs but the rolling radius is fairly different even at a glance-not long sold my x5 too -wonder if he had transfer box issues lol

Post #302111 31st Dec 2014 6:54pm
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Vogue



Member Since: 31 Jan 2008
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WTF Shocked in plain English
Staggered wheels belong on a chopper, a 10 yr old BM or a kids toy - ditch them and buy a proper set of RR wheels and all will be good Thumbs Up 2021 L405 Vogue SE 4.4 V8 DIESEL ~ #17

Post #302153 1st Jan 2015 12:48am
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miggit



Member Since: 12 Jul 2014
Location: Milton Keynes
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They are of X5 origin, only BMW would be so stupid to fit different sized wheels to a full time 4x4. Having said that the wheels should fit but you'll either have to run X5 tyre sizes, which will be Shocked Cos they are runflats, or, if they didn't set you back too much and you really like them, you could always flog the 2 bigger rear wheels and buy 2 smaller fronts to make an equal size set Thumbs Up
At 9J width they are only 1/2" wider than the std RR wheels so I can't see that being an issue, the only fly in the ointment would be if they have come off a BMW saloon, and they are not std fitment for a X5 or X6, then I would imagine that the weight handling will be too low. I'm sure than a bit of googlling will find the answers that you need, Good Luck Thumbs Up Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #302206 1st Jan 2015 2:50pm
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tony66



Member Since: 30 Nov 2014
Location: fife
Posts: 92

Scotland 2005 Range Rover HSE Td6 Tonga Green
x5

as an ex x5 owner i know they run different profiles front and rear on the x5 to keep rolling radius the same on staggered sets...
my facelift x5 came with 19" and once i wore the tyres out i fitted a set 20" with new proxes[staggered]
you dont need to use runflats[i had them on an e61 before and am not a fan either]

as it happens have found another set on the web but it would leave me with a set of 4x 10.5" wide wheels-i suppose they would be superb for the modded t5 brigade etc.when weather improves i will try them on for clearance in any case,but i suspect they will be a bit wide at 10.5"
i have accepted they wont go well on the l322 though

Post #302207 1st Jan 2015 3:01pm
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miggit



Member Since: 12 Jul 2014
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Are but you could equally sell them off one at a time, for all those careless drivers Thumbs Up Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #302209 1st Jan 2015 3:18pm
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fisha



Member Since: 25 Sep 2009
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2015 Range Rover Autobiography SDV8 Aruba

If someone wants to mod the rr look, then so be it, chill. That being said Tony, there are issues already discussed which do need to be considered seriously when it comes to the rr.

The weight rating of the alloys... The x5 generally has a lower axle load rating, so the wheels are likely to that lower value. It is good practice to ensure that the load rating of the wheels matches or exceeds the axle ratings. That way the wheels can take the weights the car is designed for and are less likely to fail prematurely from being weak. So it's worth trying to check this out. It may well be stamped on the inside of the alloy.

Tyre size is very important. Not so much the overall size that you choose, but that the rolling radius of the front axle matches the rolling radius of the rears. This is (at least on the earlier l322s) due to the centre diff being auto torque biasing based on detecting the difference in the rotation speeds of the front and rear propshafts. If you have different rolling radius on the axles,( something that would be easy to happen with a staggered setup) then the props will always rotate at different speeds, and centre diff tries to fight this constantly ... Result being a knackered diff. The solution is to make the front and rears being within 1% difference of each other ... And even then I would personally try to be less than that as tyre wear rates could take the difference beyond that. I looked at staggered 20" bmw alloys at one point and couldn't get a pair of tyre sizes that came within 1% of each other unless front and rear tyres were the same size ... In which case you may as well have 4 wheels the same. V8 or else ...

Post #302784 4th Jan 2015 11:10pm
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miggit



Member Since: 12 Jul 2014
Location: Milton Keynes
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^^ Fitting the same size tyres on different width rims will give you a different rolling radius, typical staggered wheel sets have a lower profile tyre on the rear because its wider. Example sizes ( random fleabay) FRONTS: 275/40x20 -- REARS: 315/35x20.
This equates to 40% of 275 = 110 mm x 2 = 220mm = 8.66" + 20" total diameter of front 28.66"
35% of 315 = 110.25 mm x 2 = 220.5 mm = 8.68" + 20" total diameter of rear 28.68"
so there is 0.02" or 0.5 mm difference between front and rear or 0.069 % difference, which in the grand scheme of things is naff all Thumbs Up Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #302797 4th Jan 2015 11:47pm
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fisha



Member Since: 25 Sep 2009
Location: Scotland
Posts: 1350

2015 Range Rover Autobiography SDV8 Aruba

Agreed. The example size you list seems to match, but if you try and scale up to match the stock diameter of the rr, I found it difficult to get a good matching pair of sizes. It was a while ago now, so there may be different options now. I just remember thinking it would be easiest just to have 4 matching rims. V8 or else ...

Post #302816 5th Jan 2015 9:02am
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stan
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miggit wrote:
^^ Fitting the same size tyres on different width rims will give you a different rolling radius,



so fitting a 255 50 20 on a 8.5j rim will give a different rolling radius to fitting to a 9.5j rim? me thinks you are mistaken.. ... - .- -.




Y. O. L. O.
.

Post #302817 5th Jan 2015 9:28am
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miggit



Member Since: 12 Jul 2014
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Agreed Stan, but it will make one hell of a difference if you fit a 255 on a 10.5J rim compared with a 8.5J, you will get to the point where the tread is not wide enough for the rim and the tyre walls will taper in to the tread, this will reduce the ratio between the wall and the tread and thus reduce the height. I only know this from shoehorning 145's on my cooper 'S' reverse rims (5J), in my younger days, because the car ate the tyres too quickly and I couldn't afford the 165's it should have had, strange, I could never work out why the tyres never seemed to last on the front Whistle
Most of the BMW sets seem to have a difference of 2", if you put the same size tread on both, there has got to be a difference in height. Not only will it reduce the height, slightly, it will also expose the rim to more damage from the road and kurbs and anything else that jumps sideways at you Laughing Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #302821 5th Jan 2015 10:05am
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miggit



Member Since: 12 Jul 2014
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You can get 275/45/r21 and 315/40/r21 tyres from Continental, as long as you can find a tyre that's 40 mm wider for the rear and 5% less aspect ratio, you should be good. Having said that, it would appear that you've shot yourself in both feet and the gentleman's veg department Shocked as there are very few 21" tyres to start with, couldn't you have got them in 20"? It would have made your life a lot easier Wink Yesterday I couldn't spell Engineer... Today I are one!
Inventor of the 'Guide-o-Matic automatic wheel alignment tool'
Former long term L322 owner, Up/Down graded to a Classic Tractor!

Post #302825 5th Jan 2015 10:28am
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