 | Home > Technical > Cooper STT Pro K rating |
 
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| camelman Member Since: 27 Feb 2013 Location: Peak District Posts: 3372  
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Depends what size you are looking for, most of the larger sizes are only K rated (68mph), the smaller ones are Q or R
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16th Feb 2023 3:42pm |
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| shanecl Member Since: 20 Mar 2013 Location: Louth Posts: 499  
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Ah ok, i was looking at 275/70/18
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16th Feb 2023 3:49pm |
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| camelman Member Since: 27 Feb 2013 Location: Peak District Posts: 3372
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All of the sizes and the speed ratings are here:
A lot of the 18s are only 68mph. https://www.coopertire.co.uk/tires/discoverer-stt-pro-p.o.r |
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16th Feb 2023 3:57pm |
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| shanecl Member Since: 20 Mar 2013 Location: Louth Posts: 499
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I cant see myself going over the 65mph but i think id feel a little safer with a bit more ley way on the speed rating.
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16th Feb 2023 4:17pm |
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| DSC-off Member Since: 16 Oct 2014 Location: North East Posts: 1401 
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Even back in 1985 that wasn't an acceptable speed limit.
Click image to enlarge Sorry Marty, we can't save the world, it's these Cooper tyres... |
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16th Feb 2023 8:00pm |
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| shanecl Member Since: 20 Mar 2013 Location: Louth Posts: 499
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π©π©π€£π€£π€£
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17th Feb 2023 11:54am |
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| 106Lad Member Since: 29 Oct 2021 Location: Northern Ireland Posts: 28
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I have 17inch modulars and they seem to have a different rating.
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12th Mar 2023 9:39pm |
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| marsie Member Since: 17 Nov 2011 Location: sheffieldish Posts: 532  
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Mine has 265 16 STT pros and are K rated
 2000 90 TD5,galv chassis, d2 axles ,Bas remap , alisport intercooler , d2 transfer box , side windows-more to come-much more!! *GONE*
2004 110 TD5 Double cab. *GONE* 2010 110 2.4 XS station wagon |
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30th Mar 2023 11:23am |
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| camelman Member Since: 27 Feb 2013 Location: Peak District Posts: 3372
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Just be aware that K ratings mean they are only legal to 68mph max speed
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30th Mar 2023 11:59am |
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| FD7 Member Since: 16 Feb 2021 Location: Midland Posts: 170 
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I have some older 265/75/16 Cooper STT pro's and they're Q rated, but can't understand why the newer variants remain K rated.
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30th Mar 2023 7:37pm |
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| DSC-off Member Since: 16 Oct 2014 Location: North East Posts: 1401
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Yes, you do have to question what do they know about their tyres, their own specifications and testing, that only gives a 68mph speed rating?
Or you can pay less for another manufacturer's Q rated tyre that's OK for 99mph. |
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31st Mar 2023 7:16pm |
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| Ianh Member Since: 17 Sep 2018 Location: Essex Posts: 1999
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Running tyres that have a lower speed rating than specified for your vehicle could cause your insurer to not pay out a claim. So you also need to check with your insurer that they are happy with you running tyres that are below the manufactures specification for your vehicle. The same can be said for the load index as well.
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31st Mar 2023 10:04pm |
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| FD7 Member Since: 16 Feb 2021 Location: Midland Posts: 170
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Not questioning their expertise, more why they didn't re-produce a Q rated offering as they previously did (or maybe they did, it just seems nobody wants to offer it?). Afterall their scriptures detail they're much improved over the prior iterations.
If its an option for you, the BFG KM's (265/75/16) I have on another Landy are Q rated and my replacement wheels / tyres on BFG 285/60/18 albeit all terrain are S rated! Very good point re: insurance! |
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31st Mar 2023 10:21pm |
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| shanecl Member Since: 20 Mar 2013 Location: Louth Posts: 499
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Thanks FD7, i think i'll go down the BFG route, trying to find a size that would look a little fat with the all terrains if ya get me
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3rd Apr 2023 9:43am |
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