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cooch t31
X-TRAIL HOLIC
Date Registered: 06-2008
Location: Blue Mountains, NSW
TOTAL POSTS: 5966
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Re: Re:
quote:
Ian Ewin wrote:
Tony,
I agree in this instance, as bigwillie's tyres will be a notable increase in size from standard. Although the "Any type of oversized tyre" comment may have been a little too broad to warrant the cv/driveline/steering,etc warning. Oversized wheels/tyres are an incredibly common occurence, in particular with the younger crowd ie. 20inch rims on all manner of light/heavy vehicles, and it's fairly rare that you'll hear about cv's and the like breaking/failing earlier than they usually would on those particular cars. Keeping in mind too, that younger folk are also significantly more likely to push/punish those driveline/steering components more than anyone on the road, haha.
Oversized tyre, I am referring to any size over standard, and yes just going one size bigger in tyre height comes into play even though very minor.
20 inch rims are not what I call over sized as the tyres are still thin to keep within the rolling diameter of standard.
Start playing with the offsets and that's a different ball game.
--- Tony X-891c
HERE is my D22 Navara
HERE is my old 2008 T31, ST Series1
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31/Mar/2013, 6:32 am
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Charlie250
X-TRAIL ENTHUSIAST
Date Registered: 08-2012
TOTAL POSTS: 193
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Re: Thinking about oversized tyres on T31
quote:
Johngqld wrote:
Hi to All,
I have been running the Yokohama Geolanders in 225 / 65 /17 for nearly 12,000 klm since November last year. Fuel usage is up by about half a litre per 100 klm from my original factory Bridgestones which were the 215 / 16. With a rolling diameter of some 46mm more, I got a lift of 23 mm and at no point have they scrubbed, scraped on the body work. Bonus is the van is now level behind it. They are also a great tyre in both wet and dry and gravel, with road noise minimal. I'm actually going to get a 225 /70/16 and fit this to it's existing steel rim as the spare as there is only 4mm difference in diameter.
John
John, your fuel usage isn't up at all.
By making the profile change that you have, you have decreased the amount your speedo over reads.
With the standard tyre size, your speedo over reads by about 9km/h at an indicated 110km/h. This means that are actually doing 101 km/h. Therfore when you calculate fuel figures, your economy appears to be approx 9% better than it really is.
When you increase tyre rolling diameter to reduce speedo error, your fuel economy figures are in fact more accurate.
Your economy hasn't gotten worse. Dependant on the vehicle, it most likely slightly improved due to the reduction in rpm.
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X-2634 2012 Series IV TS Man, Kings Springs, Bridgestone D697's, High Tech Exhaust, Turbo Timer, DBA Slotted Rotors, QFM HPX Pads, Tow Bar, Cargo Barrier, UHF, HID Dr Lights, LED Light Bar, K&N Filter, Bonnet Struts, & Premium Tint
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9/Jun/2013, 11:31 pm
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Charlie250
X-TRAIL ENTHUSIAST
Date Registered: 08-2012
TOTAL POSTS: 193
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Re: Thinking about oversized tyres on T31
quote:
Johngqld wrote:
Hi to All,
I have been running the Yokohama Geolanders in 225 / 65 /17 for nearly 12,000 klm since November last year. Fuel usage is up by about half a litre per 100 klm from my original factory Bridgestones which were the 215 / 16. With a rolling diameter of some 46mm more, I got a lift of 23 mm and at no point have they scrubbed, scraped on the body work. Bonus is the van is now level behind it. They are also a great tyre in both wet and dry and gravel, with road noise minimal. I'm actually going to get a 225 /70/16 and fit this to it's existing steel rim as the spare as there is only 4mm difference in diameter.
John
John, your fuel usage isn't up at all.
By making the profile change that you have, you have decreased the amount your speedo over reads.
With the standard tyre size, your speedo over reads by about 9km/h at an indicated 110km/h. This means that are actually doing 101 km/h. When you calculate fuel figures with standard tyres, your economy appears to be approx 9% better than it really is.
When you increase tyre rolling diameter to reduce speedo error, your fuel economy figures are in fact more accurate.
Your economy hasn't gotten worse. Dependant on the vehicle, it most likely slightly improved due to the slight reduction in rpm.
Last edited by Charlie250, 8/Sep/2013, 2:17 pm
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X-2634 2012 Series IV TS Man, Kings Springs, Bridgestone D697's, High Tech Exhaust, Turbo Timer, DBA Slotted Rotors, QFM HPX Pads, Tow Bar, Cargo Barrier, UHF, HID Dr Lights, LED Light Bar, K&N Filter, Bonnet Struts, & Premium Tint
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9/Jun/2013, 11:31 pm
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Charlie250
X-TRAIL ENTHUSIAST
Date Registered: 08-2012
TOTAL POSTS: 193
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Re: Tyres
According to my GPS, the Dueller 697's fitted to my ride, (225 65 17) have my speedo indicating 110km/h when in fact it is only doing 105 km/h.
If I can get Dueller 697's in a 235 65 17 at a decent price when the time comes, I'll go for them. (Currently the 235 is about $80 a tyre dearer than the 225!)
Otherwise I'll stick with the 225 65 17
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X-2634 2012 Series IV TS Man, Kings Springs, Bridgestone D697's, High Tech Exhaust, Turbo Timer, DBA Slotted Rotors, QFM HPX Pads, Tow Bar, Cargo Barrier, UHF, HID Dr Lights, LED Light Bar, K&N Filter, Bonnet Struts, & Premium Tint
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25/Nov/2013, 1:16 pm
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Toddyh03
X-TRAIL HOLIC
Date Registered: 08-2011
Location: Lalor Park, NSW
TOTAL POSTS: 1663
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Re: Thinking about oversized tyres on T31
Great news everyone in NSW. They have finally released VSI 6. You can now run tyres that are up to 7% larger than stock. So if stock is 215/60/r17 you can run 225/65/r17 legally. Could even go up to 235/65/r17 (only just as it's bang on 7%). See the document here. Page 7 has the tyre details.
This means even Ian's 29" muddies are completely legal now without any certification required.
--- Toddyh X-2048 (c)
New: Challenger
Old: 2010 T31 Diesel modified
My XTrail |
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10/Dec/2013, 10:03 am
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craig90
X-TRAIL NEWBIE
Date Registered: 12-2009
Location: Brisbane
TOTAL POSTS: 90
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Re: Thinking about oversized tyres on T31
Good to see they have changed the rules in QLD for tyre sizes (Wasn't like this when i bought my last set of tyres)
Any tyre fitted to a passenger car or passenger car derivative must not
be more than 15mm larger or 26mm smaller than that of any tyre designated by the vehicle
manufacturer for that model.
The overall diameter of any tyre fitted to:
4WD passenger vehicles specifically designed for off-road use (typically MC ADR
category). All wheel drive (AWD) vehicles including those AWD vehicles that may be
certified as MC ADR category, (also commonly known as soft roaders) are not
included in this category;
4WD goods vehicles and their 2WD equivalents if the chassis and running gear are
essentially the same as the 4WD version (N ADR category); or
any medium weight goods vehicle (NA2, NB ADR category).
Must not be more than 50mm larger or 26mm smaller than that of any tyre designated by the
vehicle manufacturer for that vehicle.
Note: Increases in tyre diameter are subject to compliance with all other requirements
specified under this clause (Clause 4.2 Non-Standard Tyres and Rims) and may
therefore be limited by other factors such as insufficient clearance.
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X-1467 08 T31 TL Auto Platinum: Tinted Bonnet Protector, Tinted Windows, Fitted Seat Covers F&R, Rubber mats, Phone kit, Luggage Carpet, Weather Shields, Dash Mat, Tow bar, K&N filter, Twin screen DVD Player (the new Kingswood)
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21/Dec/2013, 3:03 pm
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