David M
X-TRAIL FANATIC
Date Registered: 02-2005
Location: Taylor's Hill (Melbourne)
TOTAL POSTS: 466
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Re: Replacement Tyres
With the standard tyres (now at 40,000kms) the speed check over the bridges at two different locations showed 97kph when the speedo showed 100. 3% on the safe side (Victoria Police and speed cameras are not as forgiving as the ADR's) I can live with.
--- David M (X095)
ST Auto (series 1) 180,000 kms
Nissan nudge, fog lights, towbar, floor mats, K&N filter, Cooper CS4s, electric trailer brake controller, GME TX3220
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4/Apr/2005, 8:13 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Replacement Tyres
quote: xtrailing wrote:
Its more to do with the rolling diameter of the tyre than the actual rim diameter. A lower profile 17 can have the same rolling diameter as a high profile 15. ADRS permit up to 10% speedo error & manufacturers usually er on the side of caution, making the speedo read lower than your actual speed. By fitting the larger rolling diameter tyre it can help to correct this discrepancy
Hi xtrailing,
I'm now shopping around and re-searching 16" tyres to fit the new alloys that I recently bought.
I looked at the tyre size you currently have, but when I run this size against the OEM ones (215/65/16) using the Tyre Size Calculator it gives me a result saying it is outside of the recommended 3% diameter change and the speedo reading will be 5.1% too slow.
Is this a problem?
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10/Apr/2005, 1:15 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Replacement Tyres
Hi Guys,
I'm now looking at buying 16" tyres to suit my new set of rims and I have looked through our forum, Richi's list as well as on the net and have narrowed down my chioce to 2 tyres (this was based on my driving pattern, as I'll be doing more on road drving than off road)
1. Pirelli Scorpion S/T (70% on road, 30% off road)
2. Dunlop Grandtrek AT2 (50% and 50%)
I like the look of the Pirelli's though
Have narrowed down the approx. cost of the Dunlop ones to about $220/tyre (with no shopping around done yet), but I couldn't get the price of the Pirelli's. Does anyone know?
P.S. The above 2 tyres are the exact size replacement of the standard OEM ones (215/65/16)
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10/Apr/2005, 1:32 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Replacement Tyres
Hi Phil,
I also want to buy a larger tyre if I can, but I don't want to compromise the speedo reading and put it out of wack so much.
I have used 2 tyre size calculators when I compared the (215/60/16) standard size tyre against (225/70/16) as the new tyre and both of them suggested that the standard rolling diameter for the standard tyres is 664.21mm while the new tyre size comes-up as having 721.4mm
This will affect the speedo reading and the result given suggestes that a speedo reading using that standard OEM tyre size of 100Kmph would be translated to 108.6Kmph using the larger tyre (that's a fair bit out of wack)
HERE is the other tyre size calculator I used.
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10/Apr/2005, 7:40 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Replacement Tyres
Phil,
My speedo is spot on at the moment and I have checked it against the distance/speed markers on the highway (also not sure how accurate are these)
If you're saying that your speedo is reading correctly with this size of tyres I can only trust what you're saying and this is turn makes it even more confusing for me to select my new tyres
Have you tried driving with a handheld GPS on board to see what speed reading it gives you?
Do you have a photo of them on your exy?
Last edited by jalalski, 10/Apr/2005, 10:02 am
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10/Apr/2005, 9:53 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Replacement Tyres
Hi Phil,
Yes, it's so confusing that I just went-out and bought the 1st set of tyres I could find LOL =D
Check them-out (they do look good though with the new rims)
Don't ask me about the brand, as I couldn't find it written on the tyres
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10/Apr/2005, 11:41 am
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