 | Home > Wheels & Tyres > Insa Turbo K2 issues |
 
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| Zirmbach Member Since: 16 Sep 2020 Location: Scotland Posts: 72   
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To add to this - was running 30f 35r pressure on old tyres (not that they held air well…) now on 30/30
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31st Aug 2022 9:47pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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It could be any one of a number of things, unfortunately. I'm not familiar with that particular tyre although Insa have a pretty good reputation amongst remoulds. They may need different pressures though, or may just be a bit poor in that size. Alternatively, the size change may have found pre-existing weak spots in your suspension or swivels. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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1st Sep 2022 9:03am |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 623  
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You are comparing AT and MT tyres. MT are always worse on road, than standard road tyres. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo
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1st Sep 2022 10:07am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17432 
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Have you any prior experience with 285s on a Defender?
They tell you about every road surface defect to a much greater extent than even 265s and do have a detrimental effect on steering performance. This was in fact one of the main reasons I changed years ago to 255/85s which give a much nicer driving experience. I've no experience with Insas, only BFG and Kumho. |
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1st Sep 2022 10:09am |
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| camelman Member Since: 27 Feb 2013 Location: Peak District Posts: 3373
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Probably not directly related to your issues but the version of that tyre is N rated (81mph) whereas all the other (smaller) sizes are Q rated (100mph).
As previously mentioned, the wider you go, the more the truck will let you know about every imperfection in the road surface. It's also an agressive tyre which is going to impede its on road handling. I ran 285s but on an 8J wheel (not your 9.5J) and didn't really have an issue but that was with KO2s. Currently running 315/75/16 KM3s and it's definitely more 'lively' on the road than with smaller tyres  |
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1st Sep 2022 10:30am |
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| Zirmbach Member Since: 16 Sep 2020 Location: Scotland Posts: 72
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Thanks all, sounds mostly like it is just how those tyres behave then.
No experience of 285 on defender but driven 33 and 35 on Landcruiser and was much more controllable. Will maybe play with pressure a bit to see if it helps, would you suggest going lower or higher than 30? Not looking to top out on speed but comfortable at speed limits would be nice at least! |
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1st Sep 2022 10:59am |
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| I Like Old Skool Member Since: 23 Feb 2015 Location: Manchester Posts: 814 
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That is a big tyre, on a wide rim and probably with a big increase in track? You are now experiencing the downside of choosing a big tyre for looks over practicality.
Vague handling might not all be due to the tyres though. As has already been said, it could be wear/play in any of the steering components which is being magnified by the change in geometry of the new wheels. Steering column UJs, steering box, TREs, swivels, all bushes (including rear axle as this can steer if there is any play at the back). Also check tracking as this needs to be spot on too. At the steering box check the bottom output shaft isn't moving side to side and also check the drop arm is fully secure on the output shaft as this can sometimes develop a tiny amount of play which gives the symptoms you are describing. If you want to run tyres of that size then everything has to be in A1 condition or it will feel like poop (a surprising number of people tolerate the poop handling unfortunately, rather than spending the time, effort and money it takes to get it right and safe, but who cares if it looks good? Please don't be one of those people. |
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3rd Sep 2022 10:43am |
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| Zirmbach Member Since: 16 Sep 2020 Location: Scotland Posts: 72
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Thanks for the tips, yep I chose style over substance but totally want to make it work as well as it can, took them back to get balanced and that made a huge difference, though each front wheel has a stack of weights stuck to it now…
Will go through the checklist and see if there’s anything else adding to the issues. Intention was always to upgrade anything that has worn rather than just replace it. |
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3rd Sep 2022 1:24pm |
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