/ Tyre load speed ratings

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Gudge on 16 Jan 2013
Hi

I use 104 R rated tyres which (I think) means there OK to carry a load of 900 kg up to 106 mph.

Does the load rating increase at lower speeds e.g. can the tyre bear a load of 1000 kg at a normal cruising speed of say 70 mph?

Commonsense suggests so but just checking if anyone knows for sure.

Cheers

CG.

JSA - on 16 Jan 2013
In reply to Gudge:
What vehicle are they on?
Gudge on 16 Jan 2013
In reply to Gudge:

They're on a Toyota Hiace.
arch - on 16 Jan 2013
In reply to Gudge: We have a Mercedes Benz Unimog at work with tractor tyre rated at 55mph. However the machine is de-rated by our garage to 50mph because of the loads we carry.
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Richard Wilson - on 16 Jan 2013
Lowering the max speed will not alter the recommended load rating. That also relates to cornering & braking forces.


However as 4 x 900kg is 3600kg & that is more than the max gross weight of that vehicle you should be ok. The only issue could be the rear axle loading which could be more than 50% of the total.

BUT you should fit the recommended load & speed rating that the maker recommends.


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