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D4 - Wheels and Tyres Refurbing, center caps, tyre brands, tyrefitters - discuss it here |
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#1
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Tyre pressures Dunlop 275/35 ZR21 on A8L
I have a set of 21x9J Audi 5-Spoke Rotor Titanium Alloys on my car fitted with 275/35 ZR21 103Y Dunlop SP Sport Maxx GT tyres.
The sticker on the inside of the drivers door only goes up to 20” and the Owners Manual unhelpfully refers you to the sticker stating tyre pressures. The n/s/f tyre looks to be a little low and only has 23psi in it and the other three hover around 26-27.5 psi all of which seems low to me. The Kwikfit site although it recognises my car from the registration number draws a complete blank on tyre pressures for all tyre sizes. The Dunlop website although it details the technical specs for the tyre omits probably the most important item...pressures! So my question would be what are the recommended tyre pressures for these tyres on my 2014 Facelift A8L? I think I’ll pump them up to 36psi all round for the time being until I get a definitive answer. Thanks & kind regards, -=Glyn=- Last edited by GlynH; 25th March 2018 at 04:58 PM. |
#2
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36 is a good bet as far as I am concerned. My tame tyre man agrees with me.
I have played with pressures but finally opted at 36 on a cold day. I do monitor pressures and temperatures on each wheel including the spare with a TyrePal system. The only problem I have is SWMBO panics if there is a discrepancy of one pound in the tyre pressures. Three at 36 and one at 35 has her crawling all over the roof lining.
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Ray at Wigan Pier 2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore.. In progress, Nothing left to do. Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter) |
#3
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23 is definitely too low, 32-42 would be my recommendation depending on load and driving conditions so 36 seem like a good middle way.
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Currently 8less 2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D 8 history: 2006 A8 Sport 4.2TDI quattro SOLD, 1997 S8, reached end of life with gearbox failure |
#4
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36-38 front, 32-39 rear......
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#5
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When I did one of my advance driver course with an ex Met Police examiner we discussed tyre pressure in non standard tyre and wheel combinations.
His recommendation is to set up at a datum (say 34 in your case); then drive the car the manner you intend (urban, motorway, track) and once the tyres are at operating temperature measure them again. You are looking for an increase of 10%. If it's higher than 10% then the tyres were under inflated when cold. Under 10% then they were originally over inflated. It's all about sidewall flexing. Of course it also depends on the manner in which the car is being driven. There are no, one pressure suits all occasions.
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Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light. |
#6
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Quote:
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#7
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I generally ran my Kahn Wheels which were 21" at between 38 & 40 psi and that seemed to work well. fronts were 255 30 21 and rears were 295 25 21
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Confidence is the feeling you have before you know better . . . . Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange 2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee 20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble Audi A8L D2 4.2 Petrol with LPG - Ebony Black Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior and some other A8's A8L's and Mercs |
#8
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I should have mentioned, this picture is of the OEM pressures sticker from a 2015 D4, which shows the recommended pressures for this size of tyre.....
It also has a part number, should you want to order one for your own door |
#9
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Thanks for taking the time to reply guys...I’ve learned a lot.
And I’ve ordered a new door sticker from Audi for the bargain price of £4.57. Probably the cheapest thing I’ve ever brought from Audi -=Glyn=- |
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