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al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10350
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| what a differnce a tyre makes |
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On saturday I took my 20's off, running 265/50x20 Yokohama ST's, and fitted my 18's with 255/60x18 Grabber AT2's, so that I'd have some grip for the winter. On a steady run up the M6 this morning I noticed two things:
1) MPG reading on the crap trip comp was showing 36mpg, instead of the usual 31
2) the ride was crap - car felt really nervous on the road, instead of its usual "on rails" feel. I guess this is down to the larger block trad of the AT's aloowing more tread movement.
guess you cant have everything 
Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD
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 5th Dec 2011 10:43 am |
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B16 KJR
Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005
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What sort of pressures are you running at Al ? I have my AT2's at 36 psi front 39 psi rear and it feels fine.
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| 5th Dec 2011 11:29 am |
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al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10350
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i've gone with 33 front and 36 rear, as per the pressures shown on the door label. Do you recon this is too soft. Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD
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| 5th Dec 2011 12:02 pm |
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B16 KJR
Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005
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I seem to remember that Andy from AJS Tyres recommended they be run at approx 3-4 psi higher than normal.
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| 5th Dec 2011 4:34 pm |
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AJS4X4
Member Since: 30 Mar 2008
Location: Surrey
Posts: 3224
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Standard pressure is fine but some are unhappy with loss of MPG so to make it a little better up 2-4psi.
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| 5th Dec 2011 4:44 pm |
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al cope
Member Since: 08 Nov 2005
Location: Oldbury, WM
Posts: 10350
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well my MPG had improved, but I will take them up slightly to see if the ride improves a little.
Cheers
Al Volvo XC90 B5 Plus Dark
Gone - MY18 D5 HSE - Corris on 22's with Black Pack
Now gone - MY16 D4 SE Tech, Loire Blue, Almond Leather, Privacy, plus some other goodies.
Old - MY12 D4 SDV6 XS Auto - Ipanema Sand with Almond Leather - Plus other niceties, and D4.com sticker
Older - D3 TDV6 XS Auto - Lugano Teal with Almond Leather, 20" Stormers, Shiny Tailpipes, DVD/TV - and obligatory D3 sticker
Ancient - D3 TDV6 S - Tonga with Ebony, 20" Stormers, satnav & DVD
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| 5th Dec 2011 6:09 pm |
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