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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4704  
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There is a speed rating on all tyres and it is illegal to fit a tyre with a lower speed rating than your car's maximum speed. Any tyres fitted by Land Rover to the Defender have always had a higher speed rating than the vehicle was capable of . 1982 88" 2.25 diesel
1992 110 200tdi csw -Zikali 2008 110 2.4 tdci csw-Zulu 2011 110 2.4 tdci csw-Masai |
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13th Jun 2023 4:49pm |
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| RaenerPuma2007110 Member Since: 13 Jun 2023 Location: Bournemouth Posts: 39  
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Ok that's good to know, thanks.
they have a load rating of E which means the tyre has a ply rating 10 and a load pressure of 80 psi. so im back to the original question of whether to run them at 80, 60 or 34psi. |
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13th Jun 2023 4:55pm |
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| RaenerPuma2007110 Member Since: 13 Jun 2023 Location: Bournemouth Posts: 39
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thank you
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13th Jun 2023 5:01pm |
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| Spruce Pirate Member Since: 08 Feb 2013 Location: Stirlingshire Posts: 124  
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When I had a set of Mud Terrains fitted one of the fitters was very concerned that I knew they wouldn't be as grippy on tar as the ones coming off. I think he asked if I'd driven a car with MT's on it before. I pointed out that I had indeed done a few miles with MT's before and that while they are less grippy on tar in the wet, a) they're much grippier in the dirt than the road tyres they were replacing and, b) it's a Defender, it's not exactly getting pinged around corners at high speed. The other fitter more or less rolled his eyes at his colleague while this exchange was going on.
Point is, some people get very worried when something deviates from the norm and feel the need to point out that you might have left the normal path that they are used to travelling. Whether this is done out of genuine concern, an overly rigid adherence to the rule book or a misguided idea that they may somehow be found liable for your choices if something goes wrong probably differs case by case. Whatever the garage's motives in your case, at least now you are much better informed about which tyres you've got and their suitability for the vehicle. Dirty Deeds - Done Dirt Cheap |
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13th Jun 2023 8:15pm |
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| spudfan Member Since: 10 Sep 2007 Location: Co Donegal Posts: 4704
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 Click image to enlarge 1982 88" 2.25 diesel 1992 110 200tdi csw -Zikali 2008 110 2.4 tdci csw-Zulu 2011 110 2.4 tdci csw-Masai |
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13th Jun 2023 9:45pm |
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| TexasRover Member Since: 24 Nov 2022 Location: Paris Posts: 1084  
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Why do they make tires above M rating anyway? Track use?
The logic of any regulator would be that 130 kph is the max allowed speed in Europe. |
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14th Jun 2023 4:11am |
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| Mossberg Member Since: 29 Feb 2020 Location: Lancs Posts: 553 
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I suppose with that logic you would also ask why manufacturers produce cars capable of speeds above that limit.
I suppose it would be reckless to fit tyres that were not capable of performing to the same capacity as the rest of the vehicle. When I am on a motorway I try and maintain the speed limit and I am often the one being overtaken. I certainly wouldn't want any of those passing me to have tyres not suited to the speed they were doing as if they do have a blowout there will be many more involved in the incident than just the ones exceeding the speed limit. Also, how many times are you overtaken where you're first thoughts about the driver are "what a pr1ck!" And I don't mean that about people doing 80-85, but those doing 100+ On the other end of the scale, it does make me chuckle when I pass people doing around 55-60 in their very expensive and very capable cars in my little Seat ibiza or the Defender. |
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14th Jun 2023 5:55am |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2656
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Same reason they make cars that go faster
Besides 130kph is not the max! |
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14th Jun 2023 5:56am |
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| kenzle8a Member Since: 12 Feb 2020 Location: None Posts: 1074 
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The Germans would disagree  |
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14th Jun 2023 7:52am |
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| Chicken Drumstick Member Since: 17 Aug 2020 Location: Near MK Posts: 751
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I don't know where you found that info, but it doesn't sound very accurate or true. All tyres have a speed rating, use this to determine if the tyre is suitable or not for higher speeds, not if it is LT or commercial. No idea what is meant by 'will do nothing good for your engine'. Sounds like someone knowing nothing about vehicles. A Land Rover is capable of towing 3.5 tonne with a gross vehicle weight of around 3 tonne or so. Even if you did 500,000 miles, commercial tyres would make no odds to the engine. MPG "might' be effected, but is up for debate tbh. Considering alternative tyres might be All Terrains or Mud Terrains. |
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14th Jun 2023 8:32am |
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| Chicken Drumstick Member Since: 17 Aug 2020 Location: Near MK Posts: 751
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I don't think that is true at all, not all car makers publish top speeds. So you really wouldn't know. |
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14th Jun 2023 8:33am |
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| Chicken Drumstick Member Since: 17 Aug 2020 Location: Near MK Posts: 751
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Maximum inflated pressures are not the same as what you'd normally want to run. On a 90 for general use 26-28psi all round is generally quite acceptable. If hauling or towing you might want more. |
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14th Jun 2023 8:34am |
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| Chicken Drumstick Member Since: 17 Aug 2020 Location: Near MK Posts: 751
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Surely not serious.... 1) There are places in the World with much higher or no speed limits 2) Cars can and are used in places that aren't the public roads 3) some vehicles can legally travel vastly quicker than the published speed limits |
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14th Jun 2023 8:38am |
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| TexasRover Member Since: 24 Nov 2022 Location: Paris Posts: 1084
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No I was not serious.
Tires specs are a pet peeve for me. In fact I used to live in Norway and there the tire spec is listed on your registration document (V5 equivalent) and at your MOT they check. I recall it lists size, load rating and speed. I had a long (but futile) argument with an MOT tested because my set of winter tires was fitted on different size steel rims so the car failed the MOT. Refitting the summer tires would not be legal in the winter either. I normally did the MOT in summer, but was selling the car. I postponed the sale till after 01 April so I could legally fitted the 'correct tires' to pass the MOT. It was a Volvo and the speed rating was something like 180 kph, with 110 being the legal speed limit and the car not making that speed in the factory spec. All this stupidity when rules meet reality, as I said futile discussion. As it happens the tire speed rating for (the real) defender seems to be set at 130 kph, which at least is realistic! |
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14th Jun 2023 8:59am |
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