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Michael997



Member Since: 31 Jan 2006
Location: Worcestershire
Posts: 227

United Kingdom 
Right or wrong tyres?

I have just bought what I hope was a bargain but maybe someone out there knows different.

I have just bought a set of 4 new alloy wheels fitted with new tyres for £660.00 to put on my RRS HSE only problem is the new tyres are a different size to my existing ones.

The new tyres are 255/55 R19 111V

My existing tyres fitted at 24k now 45k are 255/50 ZR19 107 Y

So my burning question can I still fit them and what problems may I encounter, the new ones also look larger.

Michael Michael
2013 RRS diesel Autobiography Dynamic

Post #181004 Fri Aug 01 2008 7:25pm
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You should have had 55's before - 55's are what you need. 2005 Zambezi TDV6 - Gone but not forgotten
2009 Alaska TDV8 - Gone and much missed.



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Post #181006 Fri Aug 01 2008 7:38pm
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EX-X5!



Member Since: 24 Sep 2007
Location: Midlands
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United Kingdom 2006 Range Rover Sport TDV6 HSE Java Black

Could be wrong here, but I always thought that the profile (depth) of the tyre is reduced generally speaking as you go up in rim size to ensure the rolling circumference is the same - this means the speedo wont be out? Is this right? Question

Post #181042 Sat Aug 02 2008 6:55am
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Michael997



Member Since: 31 Jan 2006
Location: Worcestershire
Posts: 227

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Thanks Guy's

So what sizes are on YOUR HSE's

Michael Question Michael
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Post #181043 Sat Aug 02 2008 7:00am
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EX-X5!



Member Since: 24 Sep 2007
Location: Midlands
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United Kingdom 2006 Range Rover Sport TDV6 HSE Java Black

Well ive got 20" stormers on - I think they are 45 or 50's - not sure and i'm not going outside to check cos it's raining Big Cry Big Cry Big Cry

Post #181044 Sat Aug 02 2008 7:09am
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Michael997



Member Since: 31 Jan 2006
Location: Worcestershire
Posts: 227

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Wimp Rolling Eyes Smile Michael
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Post #181052 Sat Aug 02 2008 8:15am
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My tyres are 255/55 19 - I was presuming you are on 19's from the picture on your avatar. 2005 Zambezi TDV6 - Gone but not forgotten
2009 Alaska TDV8 - Gone and much missed.



WINNER - 2009 �Idler Of The Year� Award
Runner Up - 2009 �Just Doing What It�s Designed To Do� Award


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Post #181060 Sat Aug 02 2008 9:33am
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Supertrotter



Member Since: 10 Mar 2006
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Standard size on RRS 20" are 275/40R 20.

FFRR has 255/50R 20 presumably for better ride comfort Thumbs Up Runner up - 2009 Best Avatar Award Sad
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Post #181064 Sat Aug 02 2008 10:22am
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Leo



Member Since: 17 Sep 2007
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Kenya 

The standard size is 255/50/19, however, 255/55/19 is perfectly ok. The G4 RRS have Goodyear MTRs that come in 255/55/19 so LR see nothing wrong with it. In fact, you'll have a smoother ride.

Post #181069 Sat Aug 02 2008 1:46pm
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Michael997



Member Since: 31 Jan 2006
Location: Worcestershire
Posts: 227

United Kingdom 

Thanks Guy's

I put them on yesterday and all drives ok.

I am still concerned that in my handbook it does not list 255/55/19 also mine are V rated and the ones I took off are Y rated.

??????????????????????

Confused

Michael Michael
2013 RRS diesel Autobiography Dynamic

Post #181084 Sun Aug 03 2008 6:31am
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Olduser2



Member Since: 02 Mar 2008
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My understanding is that you took off tyres which have a higher speed rating than your replacements (i.e you took off Y Rated = 186mph and replaced with V Rated = 149mph.

Post #181085 Sun Aug 03 2008 6:51am
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Michael997



Member Since: 31 Jan 2006
Location: Worcestershire
Posts: 227

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Thats right Tumshie
M Michael
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Post #181086 Sun Aug 03 2008 7:17am
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John @ DW



Member Since: 07 May 2008
Location: Wirral
Posts: 105

United Kingdom 

The profile number is the height of the side wall as a percentage of the width so the 255/55/19 will be bigger than the 255/50/19. By running a larger diameter tyre you will put your speedo out, acutally your speedo will be 3.5% out so when your speedo reads 60mph you will actually be doing 62.1mph. Apart from that running the 255/55/19 should not be a problem. Your new tyres have a higher load rating, so you are ok there and tumshie is right about the speed rating so you will be safe to 149mph. www.designerwheels.co.uk
Single piece, 2 piece and 3 piece alloy wheel specialist
17"-26", subltle or bling we have it all

Post #181285 Mon Aug 04 2008 8:19pm
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