Sorry should have worded that a bit better.
The 94 rating will allow for an extra load to be supported safely. So it's just a bit of a "stronger" tyre. It will not degrade the ride at all.
To be honest if you have the option of one or the other just go as you please, both will be safe on your car
Thanks Guari. If it won't degrade the ride or be noisier then I'll go for the higher rated.
You need to check the correct load rating for your specific car. If the requirement is for 91Y then that or anything greater than that will be fine. If Seat's recommended load rating is 94Y , fitting anything lower will invalidate your insurance amongst other things.
Thanks Kazand. There's no load rating specific to my car, I've searched everywhere and can't find anywhere it gives a minimum specific load rating for tyres. I'll detail below what I HAVE found though.
What kazand said is spot on, i was assuming your car came with 91 from the factory.
I'm not sure what was on it out of the factory as I got it second hand, but I got it with 91W's on.
Kazand is spot on.
The number is the load rating & the letter is the speed rating.
91 is 615kg
94 is 670kg.
In other words;
2 tyres with a 91 load will support 1230kg across an axle
2 tyres with a 94 load will support 1340kg across an axle
Y is 186mph max speed at maximum load
If your car requires a minimum of 91, then fitting 94 is perfectly fine.
Thanks Andy! What you've said makes sense and kind of corroborates what I've seen online...
My manual says the "Gross Front Axle Weight (KG)" is 1075(KG).
Taking this, if I divide it in two, it'll give the max weight on one tyre (537.5kg).
If this is the case, an "89" load rated tyre would be sufficient (load rated for 580kg).
I have read though, that you should add 25% on to give some room for carrying extra load etc... so that'd take it up to 671kg, or a 95 (just)...
Given what the manual says, and then the '+25%' idea, IN THEORY, 91 OR 94 should be ample.
What do you think?
