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Quote: Originally posted by trog100 on 27/7/2014

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it come down to one simple thing.. does extra weight cause the internal area of the tyre to decrease or dosnt it.. if it does the pressure will go up.. if it dosnt it wont go up..

i am reasonably sure that adding enough extra weight will cause the tyres internal pressure containing area to decrease.. thus the pressure will go up..

i could be wrong.. but i dont think so.. he he..


trog

   

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Quote: Originally posted by Bob61 on 27/7/2014

Quote: Originally posted by trog100 on 27/7/2014it come down to one simple thing.. does extra weight cause the internal area of the tyre to decrease or dosnt it.. if it does the pressure will go up.. if it dosnt it wont go up..

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i am reasonably sure that adding enough extra weight will cause the tyres internal pressure containing area to decrease.. thus the pressure will go up..

i could be wrong.. but i dont think so.. he he..


trog

   

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That is where your answer lies...you cannot decrease the internal area, all you can do is change it's shape. So you have answered your own question.


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The surface area of the inside of the tyre will stay the same but the internal volume will change as the tyre compresses the volume is reduced but because the tyre is filled with air this can be compressed or the tyre will expand slightly to allow for the increase in pressure .
If the tyre was filled with water it wouldn't compress and be virtually solid , fill a plastic bottle with water and squeeze it with the top on its solid , remove the top and water will be pushed out as the internal volume reduces .
the surface area of the inside of the bottle stays the same , if the bottle is full of air and the top is on tight squeeze the bottle and the internal air pressure will increase
Phil



Post last edited on 27/07/2014 15:28:52