XPost: comp.os.linux.misc   
   From: daniel47@nomail.afraid.org   
      
   On 11/12/2025 11:36 pm, The Natural Philosopher wrote:   
   > On 11/12/2025 11:18, Daniel70 wrote:   
   >> On 10/12/2025 1:08 am, The Natural Philosopher wrote:   
   >>> On 09/12/2025 11:53, Daniel70 wrote:   
   >>>> On 9/12/2025 9:09 pm, The Natural Philosopher wrote:   
   >>>>> On 09/12/2025 08:35, c186282 wrote:   
   >>>>>> On 12/8/25 17:41, rbowman wrote:   
   >>>>>>> On Mon, 8 Dec 2025 14:59:12 +0100, Carlos E.R. wrote:   
   >>>>>>>   
   >>>>>>>> No, this is intentional calibration of the car speedometer   
   >>>>>>>> to 5 kilometres low. The reason is that if you see a road   
   >>>>>>>> limit of 100Km/h and you do drive at 100Km/h sharp, there   
   >>>>>>>> is no possibility of you driving just a bit above the limit   
   >>>>>>>> and be fined. You could then sue the car maker for having   
   >>>>>>>> bad instrumentation that caused you to be fined.   
   >>>>>>>   
   >>>>>>> That's the reason I've heard for Japanese bike speedometers   
   >>>>>>> being off. The speedometer in the Toyota is accurate when I'm   
   >>>>>>> running the 15" tires it's calibrated for.   
   >>>>>>   
   >>>>>> Yep, tire diameter IS critical.   
   >>>>>>   
   >>>>> There is no 'tire diameter'   
   >>>>>   
   >>>>> Only circumference.   
   >>>>   
   >>>> .... and, as circumference is dependant on diameter/radius ......   
   >>>   
   >>> which a tyre DOES NOT HAVE. Any more than a tank track does.   
   >>>   
   >> Sorry. Am I missing the point you are trying to make??   
   >>   
   >> When I but new tyres (which I'll have to do, again, soon.) I buy 15 inch   
   >> tyres (I think). Is this not the diameter of the Hubs on to which the   
   >> tyres are fitted??   
   >>   
   > Yes. Rims don;t deform. Tyres do, So a rin can be said to have an   
   > overall  diameter that the tyre does not   
      
   Correct!!   
      
   >> So the inner circumference of the Tyres 'hole' is about 15 inch diameter.   
   >   
   > WE are not talking about 'inner circumferences'. But of the bit that   
   > rolls along the road.   
   >   
   > If you want to play semantics try alt.pedant ==>   
   >   
   No, I was just trying to fill in the hole I'd dug for myself .... a   
   little!! ;-)   
   --   
   Daniel70   
      
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