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Tyres - Minimum Speed Rating - RT

My car has a 140mph top speed, according to the manufacturer - its OE tyres are "W" rated, good for 168mph!

Since the UK speed limit is 70mph and I never go abroad, can I LEGALLY fit tyres with lower speed ratings, eg "T" (118mph) or "H" (130mph) which are more readily available?

Edited by RT on 24/03/2019 at 09:14

Tyres - Minimum Speed Rating - bathtub tom

UK tyre requirements don't include speed rating, however, if you're ever involved in an accident and your insurers spot you have a lower rated tyre then you'll have some explaining to do.

Tyres - Minimum Speed Rating - FiestaOwner

UK tyre requirements don't include speed rating

Don't agree with this.

The Motor Vehicles (Approval) Regulations 2001, Schedule 3 (Item 16, Requirement 7)

www.legislation.gov.uk/uksi/2001/25/schedule/3/made

"The speed capability of all tyres fitted shall be not less than the maximum design speed of the vehicle"

Would say this lets you drop your speed rating to V(149mph), but no lower. However whether your insurance would allow this, I don't know.

Tyres - Minimum Speed Rating - FiestaOwner
"The speed capability of all tyres fitted shall be not less than the maximum design speed of the vehicle"

Does this mean that it's illegal to fit a space saver spare wheel to a car???

Tyres - Minimum Speed Rating - Engineer Andy
"The speed capability of all tyres fitted shall be not less than the maximum design speed of the vehicle"

Does this mean that it's illegal to fit a space saver spare wheel to a car???

Its a temporary spare, 80kph max for 80km (50mph for 50 miles).

Tyres - Minimum Speed Rating - RT

UK tyre requirements don't include speed rating

Don't agree with this.

The Motor Vehicles (Approval) Regulations 2001, Schedule 3 (Item 16, Requirement 7)

www.legislation.gov.uk/uksi/2001/25/schedule/3/made

"The speed capability of all tyres fitted shall be not less than the maximum design speed of the vehicle"

Would say this lets you drop your speed rating to V(149mph), but no lower. However whether your insurance would allow this, I don't know.

Thanks for that link - that does clarify the general legal requirement - however the tyre recommendations from the manufacturer include H, V and W rated tyres depending on rim size and summer/all-season/winter

Tyres - Minimum Speed Rating - FiestaOwner
The Motor Vehicles (Approval) Regulations 2001, Schedule 3 (Item 16, Requirement 7)

www.legislation.gov.uk/uksi/2001/25/schedule/3/made

"The speed capability of all tyres fitted shall be not less than the maximum design speed of the vehicle"

Would say this lets you drop your speed rating to V(149mph), but no lower. However whether your insurance would allow this, I don't know.

Thanks for that link - that does clarify the general legal requirement - however the tyre recommendations from the manufacturer include H, V and W rated tyres depending on rim size and summer/all-season/winter

Will confess that I didn't find the link to the regs myself. Found the link on a different forum where someone else was asking the same question.

Tyres - Minimum Speed Rating - badbusdriver

Without discussing it with your insurance company (and i very much doubt, they'd accept your argument), you MUST use tyres of the correct spec for your car.

I had a similar argument with a van driver not too long ago regarding the tyre load rating. He mistakenly assumed that as he didn't carry heavy loads, he would be fine with a lower load rated tyre. Not so, it has to be the correct rating for the van, not for what he does with it.

Tyres - Minimum Speed Rating - gordonbennet

Is there some exception for winter rated tyres, it's difficult finding the highest speed rating in winter rubber, V is about as high as i've seen and they are rare enough, H is the most common i think in normal sizes.

Tyres - Minimum Speed Rating - badbusdriver

Does this mean that it's illegal to fit a space saver spare wheel to a car???

No, of course not. It states quite clearly what the speed limit is on the space saver, it also states quite clearly that it is for temporary use only. Many may choose to ignore both of those, but with regards to the speed limit, that is no different than choosing to ignore the actual speed limit on the road. If you are using a space saver wheel, and are involved in an accident where it is determined that you were going faster than what you should be, then you'd get done for it, and your insurance woud probably be rendered invalid.

Tyres - Minimum Speed Rating - FiestaOwner

Does this mean that it's illegal to fit a space saver spare wheel to a car???

No, of course not. It states quite clearly what the speed limit is on the space saver, it also states quite clearly that it is for temporary use only. Many may choose to ignore both of those, but with regards to the speed limit, that is no different than choosing to ignore the actual speed limit on the road. If you are using a space saver wheel, and are involved in an accident where it is determined that you were going faster than what you should be, then you'd get done for it, and your insurance woud probably be rendered invalid.

BBD and Engineer Andy, It was meant as a "tongue in cheek" remark.

It would take a far braver person than me to reach 50mph on a space saver, never mind exceeding it.

Tyres - Minimum Speed Rating - Engineer Andy

Does this mean that it's illegal to fit a space saver spare wheel to a car???

No, of course not. It states quite clearly what the speed limit is on the space saver, it also states quite clearly that it is for temporary use only. Many may choose to ignore both of those, but with regards to the speed limit, that is no different than choosing to ignore the actual speed limit on the road. If you are using a space saver wheel, and are involved in an accident where it is determined that you were going faster than what you should be, then you'd get done for it, and your insurance woud probably be rendered invalid.

BBD and Engineer Andy, It was meant as a "tongue in cheek" remark.

It would take a far braver person than me to reach 50mph on a space saver, never mind exceeding it.

It's not always easy to spot the difference between 'tongue-in-cheek' remarks and those that aren't, when they look the same when typed...maybe adding a ;-) afterwards might help us.

Jus' sayin'...

Tyres - Minimum Speed Rating - edlithgow

Does this mean that it's illegal to fit a space saver spare wheel to a car???

No, of course not. It states quite clearly what the speed limit is on the space saver, it also states quite clearly that it is for temporary use only. Many may choose to ignore both of those, but with regards to the speed limit, that is no different than choosing to ignore the actual speed limit on the road. If you are using a space saver wheel, and are involved in an accident where it is determined that you were going faster than what you should be, then you'd get done for it, and your insurance woud probably be rendered invalid.

BBD and Engineer Andy, It was meant as a "tongue in cheek" remark.

It would take a far braver person than me to reach 50mph on a space saver, never mind exceeding it.

It's not always easy to spot the difference between 'tongue-in-cheek' remarks and those that aren't, when they look the same when typed...maybe adding a ;-) afterwards might help us.

Jus' sayin'...

"Minimum speed rating" would seem to imply that if you go any slower your tyres will explode.

That must make for rather dramatic parking.

Tyres - Minimum Speed Rating - Engineer Andy

Does this mean that it's illegal to fit a space saver spare wheel to a car???

No, of course not. It states quite clearly what the speed limit is on the space saver, it also states quite clearly that it is for temporary use only. Many may choose to ignore both of those, but with regards to the speed limit, that is no different than choosing to ignore the actual speed limit on the road. If you are using a space saver wheel, and are involved in an accident where it is determined that you were going faster than what you should be, then you'd get done for it, and your insurance woud probably be rendered invalid.

BBD and Engineer Andy, It was meant as a "tongue in cheek" remark.

It would take a far braver person than me to reach 50mph on a space saver, never mind exceeding it.

It's not always easy to spot the difference between 'tongue-in-cheek' remarks and those that aren't, when they look the same when typed...maybe adding a ;-) afterwards might help us.

Jus' sayin'...

"Minimum speed rating" would seem to imply that if you go any slower your tyres will explode.

That must make for rather dramatic parking.

This way?

youtu.be/cYRXgC8PdWQ

Tyres - Minimum Speed Rating - badbusdriver

This way?

youtu.be/cYRXgC8PdWQ

Wow, that is amazing!.

Wonder how many 'attempts' were made beforehand though!

Tyres - Minimum Speed Rating - Engineer Andy

For summer and all season tyres, you MUST fit those that either match or exceed the load and speed rating given by the manufacturer. You insurer should accept this if the car's manufacturer does (as mine did when I changed down from 16in to 15in wheels and from 205/55 R16V to 195/65 R15H), which is normally given for your specific model and trim level in the owner's handbook and often on a metal plate on the inside of the driver's side door/surround.

It's a lottery whether the insurer would accept tyres rated to be 'legal' (i.e. above the max. rated speed of the car) but not on the spec sheet of the manufacturer. Some may have a 'winter tyres' section in such documents/on the plate, but maybe on in countries where winter tyres are needed/more popular/legally required in winter. I suspect it'll be ask the manufacturer/insurer on that front over here for most cars.

I'm not sure if they'd allow winter tyres with a speed rating below that of the maximum speed of the car, as winter tyres are often used just when it's cold with no snow or ice, meaning the driver could, in theory, drive as fast as they wanted (even if that's illegal) as the road conditions (weather wise) could allow them to.

Besides the speed rating being just about speed, I think it's also about how much heat and energy the tyre can take as it is used, i.e. you'd never fit a supercar with low speed rated tyres even if they were the correct size (including width, though very unlikely) and then drove fast down winding country lanes - the tyre would probably give out as it wasn't designed for a car with that much power.

Tyres - Minimum Speed Rating - Brit_in_Germany

In Germany, if you fit winter tyres with a lower speed rating, you are meant to put a sticker on the steering wheel or dash to remind you of the lower limit. The certificate of conformity may include a lower rating for winter tyres.

Tyres - Minimum Speed Rating - Engineer Andy

In Germany, if you fit winter tyres with a lower speed rating, you are meant to put a sticker on the steering wheel or dash to remind you of the lower limit. The certificate of conformity may include a lower rating for winter tyres.

Good idea, although in the UK, I seriously doubt if any tyres on sale for ordinary vehicles are rated to below 100mph, and of course, we don't have autobahns with no speed limit.

I think we SHOULD be encourgaing vehicle owners in more northerly/remote areas of the UK that face more adverse conditions in winter to use winter/all-season tyres, as doing so would reduce accident rates (and thus insurance premiums) and increase productivity (more people mobile). Sadly, we're only catching up our continental neighbours very slowly.

Tyres - Minimum Speed Rating - FiestaOwner
I think we SHOULD be encourgaing vehicle owners in more northerly/remote areas of the UK that face more adverse conditions in winter to use winter/all-season tyres, as doing so would reduce accident rates (and thus insurance premiums) and increase productivity (more people mobile). Sadly, we're only catching up our continental neighbours very slowly.

I would go further than that.

Having driven on (and bought) winter and all seasons tyres myself, I think it should be compulsory for all cars to be supplied with all seasons tyres when new. Supplying new cars on summer tyres creates an extra expense for responsible motorists wanting to drive on suitable rubber.

It should also be mandatory for replacement tyres to be winter or all seasons.

Every winter there are clips on the TV news of people getting stuck and crashing throughout the country. It doesn't just happen "oop north" or in rural areas.

Tyres - Minimum Speed Rating - gordonbennet
Every winter there are clips on the TV news of people getting stuck and crashing throughout the country. It doesn't just happen "oop north" or in rural areas.

You will not stop lemmings smashing into each other, ever, even with all the collision avoidance electronics now fitted to the latest vehicles they still manage to beat the systems day in day out, the idiot factor will always find a way.

In some ways it's better that the most incompetent are stuck spinning harmlessly on the slightest incline in a light snow dusting then once moving wrecking wheels tyres and suspensions at slow speed kerb strikes due to no sense no grip, imagine if the lemmings could make their normal progress in such conditions, they'd still be barrelling along exactly as they do on a dry summers day, as fast as possible as close to the vehicle in front as possible and still incapable of looking further than 20 ft past the front edge of the bonnet.

No, sorry, the rest of us are better off if those who haven't a clue about what they themselves need for such conditions do not suddenly discover by default they can carry on regardless.

Tyres - Minimum Speed Rating - Brit_in_Germany

The trouble is that the CO2 figures are generated using the tyres as fitted so there is a push for the manufacturers to fit low rolling resistance tyres which, generally, are not too good in wintry conditions.

Tyres - Minimum Speed Rating - Engineer Andy
I think we SHOULD be encourgaing vehicle owners in more northerly/remote areas of the UK that face more adverse conditions in winter to use winter/all-season tyres, as doing so would reduce accident rates (and thus insurance premiums) and increase productivity (more people mobile). Sadly, we're only catching up our continental neighbours very slowly.

I would go further than that.

Having driven on (and bought) winter and all seasons tyres myself, I think it should be compulsory for all cars to be supplied with all seasons tyres when new. Supplying new cars on summer tyres creates an extra expense for responsible motorists wanting to drive on suitable rubber.

It should also be mandatory for replacement tyres to be winter or all seasons.

Every winter there are clips on the TV news of people getting stuck and crashing throughout the country. It doesn't just happen "oop north" or in rural areas.

I still think we should have the option for using summer tyres when conditions allow, or as some (like my elderly parents) do, they just don't drive when there's snow. I would also remind you that in my neck of the woods, this winter season (admitedly we still could get snow, we did in April and May not that long ago) had 2 days of very light snow that my previous two sets of summer tyres (even the naff OEMs) would've coped fine on.

Tyres - Minimum Speed Rating - CHarkin

Apart from any legal issues I don't believe its a good thing to do. Car makers expend a lot of time tuning tyres and suspension to work together for optimum handling and safety and you throw that away and go into the unknown by ignoring their recommendations. There are real physical differences in tyre grades in the materials used and the method of construction. High speed tyres give priority to keeping the tread held squarely between the rims and not be deflected by lateral forces this has a big impact on steering and handling.

It's a temptation to save a few pounds but one best resisted on a car thats not over the hill yet.

Tyres - Minimum Speed Rating - sammy1

Presumably if performance cars are speed restricted then their tyres will become less so?

Tyres - Minimum Speed Rating - Ethan Edwards

Certain manufacturers suggest tyres with a speed rating for the fastest version, but lazily specify them for all the range. But the version I own wont do anything like that speed.

So provided I fit tyres capable of 130mph when my car only does a published 112mph. All good eh?

Yet N@#$an strictly only advise tyres with 149mph rating. I believe this is the situation the OP was referencing.

My decision was my car my responsibility. So I fitted 130 mph knowing the car could never do that in reality. The main dealer never mentioned it at all, in five years despite noting the tyre condition make etc on every service report.

Edited by Ethan Edwards on 01/04/2019 at 22:54

Tyres - Minimum Speed Rating - Lee Power

The manufacturer for my car specifies 225 / 45 R17 91 V spec tyres.

Unfortunately the Michelin tyres I wanted to fit only come in 225 / 45 R17 94 W XL spec so that's what went on.

I'd always fit tyres to at least match or better the spec specified by the car manufacturer in the owners handbook or on the info label normally stuck on the car somewhere.