100 series tyres

Submitted: Tuesday, Jan 13, 2009 at 18:47
ThreadID: 65095 Views:2196 Replies:5 FollowUps:6
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Hi guys
I have a 100 series turbo diesel 2004 IFS.
The standard tyres are 275/60/17 and would like to put on some micky thomson 285/70/17
Can anyone tell me if I will have any trouble with this.
Oh also has a 2inch lift Cheers
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Reply By: Member - Graham H (QLD) - Tuesday, Jan 13, 2009 at 19:40

Tuesday, Jan 13, 2009 at 19:40
Your speedo will be well out is probably the only problem as they will have a much larger rolling circumference

Read the article here on tyres or google tyre comparators and compare the sizes.

http://www.rims-n-tires.com/rt_specs.jsp


Try that one its a good one does offsets and all
AnswerID: 344162

Follow Up By: Member - Tony B (Malanda FNQ) - Tuesday, Jan 13, 2009 at 19:54

Tuesday, Jan 13, 2009 at 19:54
Speedo will be reading 90.9k and you will actually be doing 100k. Cheers Tony
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Reply By: Member - Tony B (Malanda FNQ) - Tuesday, Jan 13, 2009 at 19:42

Tuesday, Jan 13, 2009 at 19:42
They are not legal in QLD, Where are you? - They are 34.5mm larger 12mm allowed in QLD. Cheers Tony
AnswerID: 344163

Follow Up By: Member - Tour Boy (Bororen) - Wednesday, Jan 14, 2009 at 09:14

Wednesday, Jan 14, 2009 at 09:14
Hi Tony, Most cruisers have dual tyre placards.
1 for the lower/ wider tyres such as is fitted to this vehicle and they have another one on the same sticker for the base model/RV with the 750/16 size which is close to the rolling dia of the 285's.
So maybe you could fight it by saying you wanted the width of the smaller tyres and the height of the larger standard size for ground.
But 285's don't look huge on a cruiser and as such don't really draw attention to it. The old 33x12.5x 15 look huge by comparison due to the width.

Personally I always run 285's and have done for the last 15 yrs.
Cheers
Dave
Cheers,
Dave
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Follow Up By: get outmore - Tuesday, Jan 20, 2009 at 14:20

Tuesday, Jan 20, 2009 at 14:20
there was no base model 100 series
that was the 105
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Follow Up By: Member - Tour Boy- Wednesday, Jan 21, 2009 at 10:00

Wednesday, Jan 21, 2009 at 10:00
Yeah I realise that, I only have 105's I don't ever want a 100.
But interestingly the tags on all of my 105's from the factory say 100 series wagon and the Aust copmliance plate say 105. All are rigid axle, 2x GXL and 1x RV 98, 2000 and 2004

Cheers
Dave
Cheers,
Dave
2010 Isuzu FTS800 Expedition camper
2015 Fortuner
Had 72 cruisers in my time

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Reply By: Member - Graham H (QLD) - Wednesday, Jan 14, 2009 at 10:41

Wednesday, Jan 14, 2009 at 10:41
Looking at rigs on the road lots would be illegal and thats fine if its what grabs you.

However the proverbial will hit the fan when the inevitable happens and a tough assesor goes over your car looking for ANY reason not to pay your claim.

They are not stupid and usually know the rules and after the big losses they have had recently will be looking for any reason to save money.

Personally I prefer to stay legal and not have to worry about things like that.

After all all you are getting by doing this is 10mm more width on the road. Plus the problem amd cost of getting speedo recalibrated.
Is it really worth it????????
AnswerID: 344253

Reply By: i lean - Wednesday, Jan 14, 2009 at 11:28

Wednesday, Jan 14, 2009 at 11:28
So how do I go about getting the speedo recalerbreted and how much
AnswerID: 344259

Follow Up By: Member - Graham H (QLD) - Wednesday, Jan 14, 2009 at 18:59

Wednesday, Jan 14, 2009 at 18:59
If you can solder circuit boards you can buy a kit from Jaycar for $50

If you cant you can buy a "Matchbox adapter"for $150 from a place called Marks Adapters which you will find if you Google it.

Both have to be fitted to the correct wires coming from the transmission.
Desnt alter the fact that in Qland the tyres are illegal.




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Reply By: Member - Robert G (WA) - Tuesday, Jan 20, 2009 at 11:48

Tuesday, Jan 20, 2009 at 11:48
The remarks re: legalities certainly warrant consideration, however if you decide to go larger tyres, then before you shell out $$$ for a speedo correction:

Get a GPS unit and dash mount it (borrow off someone or rent one if you don't have one) and you should be able to bring up a screen on the GPS which shows actual speed and an odometer. Reset your vehicle odometer and the GPS odemometer and go for a good drive somewhere. Make notes of the GPS speed v the Speedometer in your vehicle at varying speeds and at the end of the trip note the speedo odmeter v the GPS odometer. You should now have a good idea how far out your speedo actually is and you can use the GPS odometer figure to get a correction factor for your vehicle odometer (good for trip notes and working out fuel consumption).

I did this and even though my speedo should have been a long way out, I found it was only out by 4kms at 100kph (doing 104 when speedo says 100). I don't reckon thats enoiugh to worry about spending money correcting it. Perhaps the speedo was reading slow from factory???

Of course a proper correction is the most accurate way to go, but this is working OK for me.
AnswerID: 345190

Follow Up By: chisel - Wednesday, Jan 21, 2009 at 11:21

Wednesday, Jan 21, 2009 at 11:21
Just about all speedos read higher than actual speed from the factory. I believe there's an ADR rule that says speedos must not read lower than actual speed. So I suspect a vehicle is not (technically) roadworthy if the speedo is reading lower than your actual speed.
As you can imagine, the cops would not like a vehicle's speedo to be reading too low as the driver of the vehicle (especially if not the regular driver) would be inclined to break the speed limit.
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