Replacement tyre load/speed rating

[RVB]

Wife got a puncture last night.

The tyres on the car are 91 H but the same brand of tyre is currently only available in 94 V.

I suspect if I'm having to ask, the answer is that it's not a good idea to mix 91 H with 94 V.

What do you think?

[Aunty Pasty]

You'll be ok. V is slightly better than H.
Some people just mix tyres of different brands on a car (not what I do) so a slightly different speed rating is no big deal.

[Scrump]

Aunty Pasty said:

You'll be ok. V is slightly better than H.
Some people just mix tyres of different brands on a car (not what I do) so a slightly different speed rating is no big deal.

Different speed ratings may not be a big deal but what about the different load ratings?

[Tony1963]

Scrump said:

Different speed ratings may not be a big deal but what about the different load ratings?

Well, the new tyre has a higher load rating than the older tyre, so it’s ok on that front. Will it make any difference? I doubt it unless the car is cornered flat out. If the load rating was lower, that would be cause for concern.

[RVB]

Scrump said:

Different speed ratings may not be a big deal but what about the different load ratings?

Yes, the replacement would have both a higher speed rating and a higher load rating. If it was just one step up for one category I would just do it, but this is one step up in both categories which makes me less sure about it.

Currently has 130mph and 615kg rating, will need to be replaced by 149mph and 670kg rating.
15% higher speed rating and 9% higher load rating.
Carrying 670kg at 149mph would need a much stronger tyre than carrying 615kg at 130mph and I wonder if there will be a noticeable difference in how the tyres behave.

[stevieturbo]

RVB said:

Wife got a puncture last night.

The tyres on the car are 91 H but the same brand of tyre is currently only available in 94 V.

I suspect if I'm having to ask, the answer is that it's not a good idea to mix 91 H with 94 V.

What do you think?

What is the car, and what is the minimum it should have ?

[RVB]

stevieturbo said:

RVB said:

Wife got a puncture last night.

The tyres on the car are 91 H but the same brand of tyre is currently only available in 94 V.

I suspect if I'm having to ask, the answer is that it's not a good idea to mix 91 H with 94 V.

What do you think?

What is the car, and what is the minimum it should have ?

Zafira B, 1.8 petrol, kerb weight 1.5 tons, top speed about 120mph, probably had 91 H from the factory but manual doesn't say and I'm not with the car at the moment to look for any info on the car.

[stevieturbo]

RVB said:

Zafira B, 1.8 petrol, kerb weight 1.5 tons, top speed about 120mph, probably had 91 H from the factory but manual doesn't say and I'm not with the car at the moment to look for any info on the car.

It will state on the door jam with the tyre info.

Although no matter which way you go...it's always nice to have at least matching axle pairs. I despise vehicles having all tyres different !

[RVB]

stevieturbo said:

Although no matter which way you go...it's always nice to have at least matching axle pairs. I despise vehicles having all tyres different !

I agree. Our cars always have four matched tyres.
I'm a bit disappointed that I can't find H 91 and will probably have to accept V 94 even though they will be the same brand and model of tyre.

If H 91 are no longer available I wonder if it might be worth replacing all four with more easily sourced tyres and seeing how much the H 91 tyres might fetch on an auction site.

[stevieturbo]

just buy two new tyres and stop worrying over it then.