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Tyre Rubbing
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15208

United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4
Tyre Rubbing

Actively looking to get some 17" D3 rims for off road.
But have an option of 3 widths on the tyres I'm after.
I do believe though from older threads that there is an issue on tyres rubbing.

1] where do they rub - is it the front upright?
2] what wheel/tyre size combination does this happen on.

Have no issue whatsoever with my [road] Stormers and 295/20/45 tyres
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Post #2127967th Oct 2007 4:14 pm
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DSL
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No rubbing on 235/70 17s!!! Whistle Whistle
   
Post #2128347th Oct 2007 6:31 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
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United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Thanks Derek, but what size DO rub .... any idea anyone?
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Post #2128657th Oct 2007 7:02 pm
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disco4x4au
 


Member Since: 19 Jan 2006
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With 265/70/17 tyres (around 31.5" to 32.5" depending on manufacturer), you'll get a slight rub in the front of the rear wheel well - there's a raise in the wheel-well plastic there that covers a metal seam. Those without front bull-bars have noted some rubbing in the front as well. Taller tyres than 32.5" don't seem possible without some serious modification. As for width, as long as you keep the diameter down below 32", it seems 295 (as you've tried) is probably the limit.

Cheers,

Gordon
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Post #2129607th Oct 2007 11:21 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
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United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Thinking on Coopers STT's.
So it would appear that it's the overall diameter of the Tyre rather than the width that causes rubbing?
Therefore an STT 235/70/17 should have the same clearance as a 265/70/17.
Is this correct?
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Post #2134769th Oct 2007 5:27 pm
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Slimer
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No, the 70 is the the sidewall depth as a percentage of the width so:
235/70 Standard = 164.5mm sidewall, 760.73mm (29.95") overall diameter
245/70 STT = 171.5mm sidewall, 774.7mm (30.50") overall diameter
265/70 STT = 185.5mm sidewall, 802.64mm (31.60") overall diameter
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Post #2134879th Oct 2007 6:16 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
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United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Thanks Si
Got my eyes on 285/70/17's, any idea on diameter of these?
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Post #2134919th Oct 2007 6:22 pm
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DiscoDunc
 


Member Since: 08 May 2006
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this might help explain a few things :

http://www.carbibles.com/tyre_bible.html
 Duncan
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Post #2134939th Oct 2007 6:26 pm
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Bodsy
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285 * 70% (tyrewall to width ratio) =199.5mm sidewall + 617.14mm wheel = 816.64mm (32.15")

too big I think......
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Post #2134949th Oct 2007 6:29 pm
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ronp
 


Member Since: 29 Nov 2006
Location: North Yorkshire
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United Kingdom 2014 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Thanks DD, very informative article, will have a good read.

Thanks Bodsy, may be borderline.
I'll get down with my measuring tape tomorrow and check out.

Thanks all Thumbs Up
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Post #2134979th Oct 2007 6:39 pm
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Slimer
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Tyre Size Calculator is very useful

The other issue you may have going for wider tyres on 17" rims is rubbing caused by the width, they're narrower (7") than the 18" & 19" (8" wide) so I think the centre line maybe further in. Probably the only way to be sure is to find a friendly fitter who'll let you try a few sizes on
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Post #2135759th Oct 2007 8:46 pm
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