Increase in tyre size

Submitted: Thursday, Nov 13, 2014 at 16:33
ThreadID: 110130 Views:2325 Replies:6 FollowUps:10
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I have been considering putting larger tyres on my rims.
I have a Toyota Landcruiser (2006) wagon V8 currently fitted with 275/65R17 and was thinking of maybe putting on 285/70R17 which will give me approx 21mm height increase. I know it will create speed differences.
I was curious if anyone else has done the same without having done a suspension lift.
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Reply By: TomH - Thursday, Nov 13, 2014 at 16:41

Thursday, Nov 13, 2014 at 16:41
Remembering of courser that you only get a "Half lift" because a 21mm increase in diameter will only lift you 10.5mm Is it worth it and are they legal in your state.

Check speedo difference herehttp://www.rimsntires.com/specspro.jsp
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Follow Up By: mikehzz - Thursday, Nov 13, 2014 at 19:52

Thursday, Nov 13, 2014 at 19:52
That change is a tad over 40mm diameter increase so he will get the 21mm lift.
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Follow Up By: TomH - Thursday, Nov 13, 2014 at 20:26

Thursday, Nov 13, 2014 at 20:26
Was a bit obscure as to what he meant
In that case they may well be illegally oversize as all states have an oversize limit. Cant go that big in QLD as I wanted to to correct the speedo reading in a car and needed about that and couldnt do it.
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Follow Up By: TomH - Thursday, Nov 13, 2014 at 20:38

Thursday, Nov 13, 2014 at 20:38
A read here tells the story about tyres and lifts in WA

http://www.navara.asia/archive/index.php/t-11382.html
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Follow Up By: Batt's - Tuesday, Nov 18, 2014 at 13:16

Tuesday, Nov 18, 2014 at 13:16
TomH You can go 50mm taller than the largest tyre available from the manufacturer for your particular model in QLD with 4WD tyres giving you a height increase of 25mm. Passenger cars are allowed a 7.5mm height increase 15mm taller tyre. QLd modification code from October 2014.
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Reply By: braggy - Thursday, Nov 13, 2014 at 16:42

Thursday, Nov 13, 2014 at 16:42
Standard tyres for a 76 series wagon are exfactory, 265/70/16, most would replace with 265/75/16, have you already changed to 17' rims ?
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Follow Up By: Member - Munji - Thursday, Nov 13, 2014 at 16:46

Thursday, Nov 13, 2014 at 16:46
Toyota VX wagon came fitted with 17"
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Follow Up By: braggy - Friday, Nov 14, 2014 at 06:33

Friday, Nov 14, 2014 at 06:33
ARH, With ya now

Cheers
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Reply By: bluefella - Thursday, Nov 13, 2014 at 17:12

Thursday, Nov 13, 2014 at 17:12
Do you have enough clearance for the size increase at the bottom the front guard when going on full lock?
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Follow Up By: Member - Munji - Thursday, Nov 13, 2014 at 17:19

Thursday, Nov 13, 2014 at 17:19
No as I have not gone through with any tyre changes at this time.
I don't intend to do so until I have fully researched my options here in leiu of a suspension lift first.
I was curious if anyone else has done it to their vehicle, being a 2006 V8 wagon VX or similar.
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Reply By: pop2jocem - Thursday, Nov 13, 2014 at 21:52

Thursday, Nov 13, 2014 at 21:52
This could get interesting seeing as how most 4x4 type vehicles quote a ground clearance under the diff centers. This being usually the lowest point. Measuring under a point anywhere other than that could vary greatly depending on how much load is on board at the time. Even under the diffs could vary with tyre pressures.
So taking all that under consideration I would think that the easiest way for the cops to check you out would be by standard tyre size compared to what you may have on at the time of inspection.
Sure some of the lifts you see wandering around are so obviously not standard but a lift of say 50 mm with new or worn tyres could vary maybe either side of legal/illegal.

Cheers
Pop
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Reply By: chisel - Thursday, Nov 13, 2014 at 23:30

Thursday, Nov 13, 2014 at 23:30
285/70R17 tyres (33s) will fit on a 100 series IFS wagon without any lift.
Check on lcool for more info but basically there's no drama. I've been running that same size with no lift.
It does change the gearing a bit, makes the speedo very slightly out and affects fuel economy a bit. The V8 might deal with that a bit better than a stock TD.
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Follow Up By: mikehzz - Friday, Nov 14, 2014 at 08:13

Friday, Nov 14, 2014 at 08:13
The fuel economy goes off by the same % as the speedo and odometer. What a coincidence? Maybe it's mathematics... :-)
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Follow Up By: Member - Munji - Friday, Nov 14, 2014 at 14:18

Friday, Nov 14, 2014 at 14:18
Thanks chisel

That's the feedback I was looking for.
I'm aware that there will be some differences in fuel / speed etc
Will also look at suspension upgrade a little later when I need it - increasing load etc for remote trips.
Thanks again
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Follow Up By: Batt's - Wednesday, Nov 19, 2014 at 10:12

Wednesday, Nov 19, 2014 at 10:12
Sometime a larger tyre will increase econ, sometimes make it worse it depends on the vehicle and how much bigger the new tyres are the tread pattern and the accessories you have. You have to experiment to find out I have 285's A/T's on a diesel troll and the speedo is out by 6 km by the gps but I'm getting better econ.
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Reply By: Member - Alan H (QLD) - Friday, Nov 14, 2014 at 17:40

Friday, Nov 14, 2014 at 17:40
My travelling mate has 285/70R17 on his 200 seriees and are fine. He finds the speedo is now very accurate so watch your speed and the tyres fit the guards with a rub likely only in extreme cornering on uneven ground.

I intend to go this way also with my next set of tyres

Alan
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