sierrafery
Well-Known Member
Hi, no chance with nanocom but as those tyres are just a bit more than 5% bigger than standard the speedometer reading will be closer to the true speed like with std tyres as with std there is an aprox 5% higher speedo reading than the true speed... that's valid for almost all same generation vehicles, the speedo reading is your last concern, better watch the braking distance and consumption... and EGT if you have a gauge
MAF Diver
Member
To piggyback, I've got 265/60/18 tyres on my 20mm lift D2a V8. Factory is 255/55/18.
The speedo is out by quite a bit compared to GPS speed.
Apart from expensive recalibrations, nothing I can do, right?
sierrafery
Well-Known Member
The only way is to fit a speedo(VSS) corrector
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Hello SierraFery,
Always great inputs from you, thanks for that,
I am more concern with legal requirement, at Luxembourg all change must be registered on car paper.
just a quick one , I expected that the impact to change to the new tyre size will be not significant considering tha i increase the diameter but i reduce the wide. Do you really think that there is a important impact? and why the EGT?, my engine is stock.
thanks in advance
Amaury
Always great inputs from you, thanks for that,
I am more concern with legal requirement, at Luxembourg all change must be registered on car paper.
just a quick one , I expected that the impact to change to the new tyre size will be not significant considering tha i increase the diameter but i reduce the wide. Do you really think that there is a important impact? and why the EGT?, my engine is stock.
thanks in advance
Amaury
sierrafery
Well-Known Member
i explained many times, just one example https://www.landyzone.co.uk/land-rover/speedo-out-of-synch.375403/post-5269337
NPG
Well-Known Member
Since Luxembourg is an EU state, the legal requirements on this particular aspect are governed by Regulation 39 -
EUR-Lex - 42010X0513(03) - EN - EUR-Lex
Specifically Clause 5.3 states that "The speed indicated shall not be less than the true speed of the vehicle. At the test speeds specified in paragraph 5.2.5 above, there shall be the following relationship between the speed displayed (V1) and the true speed (V2) : 0 ≤ (V1 – V2) ≤ 0,1 V2 + 4 km/h"
In essence, it's saying that the indicated kph cannot exceed the actual kph by more than 10% + 4 kph
