As Ian has implied a response form me may be of use I will oblige.
My view is that Low Volume rims do alter the handling charictaristics through flex rates & heat dissapation. heat removed from the wheel tyre combination through natural convection properties of differing materiels, indeed of the same materiel in a modified configuration/design, however one of the main problems that causes pressure changes and high tyre tempreatures is the very stuff that inflates them that some people measure so carefully with expensive Longacre type pressure guages to 1/10 of a psi.
Simple phyics will tell you that air when heated will tend to expand. Hence the rise in pressure which in turn causes the tyre to heat more ect ect but only up to a point where regarless of heat gain the presure wil stabilise. Why is simple, the air in the tyre contains moisture/water droplets, it is what you see running from the bottom of your compressor air receiver when you drain it dailey (as I am sure everyone does) NOT! This moisture is present in in approximately 20% ofthe air we breath. When moisture heats up it expands (steam) and this is what causes a majority of the pressure rise and in turn heat rise thus performance change of the tyre. Hence Low Volume = less air/moisture = less moisture to expand = a more stable tyre.
Naturally it would be more ecconomic to ensure that your tyres were filled with air from a compressor fitted with a water trap in the line and a tank that is DRAINED DAILY. Alternatively ensure your tyres onec fitted are totally evacuated to a vaccum of -14.7 inches of murcury for 10 mins then re filled with Dry Nitrogen to produce a stable gas as possible within the tyre. You can then accurately compare the performance of each type of rim yourself and decide which suits you best. p.s. You will probably need a number of wheel types to best cope with the UK climate 28 deg ambient on some days -2 or 3 on winter meets where tyre temp is very desireable!
Probably all BULLS HIT, if so Its Ian's fault! Lol.
|
|
