Hello,
Is there a proven equipment and procedere to measure the tire temperature and the air temperatur inside the tire. What is more relevant for roling resistant:
- tire temperature (shore of rubber)
- air temperature inside the tire (corealation to air pressure)
My idea is to measure the tire temperature with infrared on the tread (local temperatur) and measure the air temperatur inside on the rim, also with infrared.
What are your thoughts about this subject?
What do you do, to keep the influence of temperature related rolling resistance of the tire as small as possible at aerotests? How long is the tire warm up in a velodrom (distance) and on tarmac
Thanks for reply!
Jolly interesting/challenging, but why try to do this when the delta is a partial proxy for a change in internal pressure, the absolute value of which can be measured quickly, easily, accurately and consistently?
Having measured temperature (consider accuracy achievable) what will you do with this info?
The gradient of rolling resistance v temperature (~o~K) is very low in the region of normal recommended pressures for load and road tyre width (eg 45kg and 28mm).
Since pressure varies with degrees Kelvin a one degree change means a change in pressure of circa 0.33% (1/300) at 27oC, so at 60psi, 0.2psi! Every 5 degree (C) change = 1psi.
Hi Ajax_Bay,
thanks for your detailed answer. I’ll do my first serious aero tests with bicycles in may and do my best to avoid random failures and to understand systematic failures. I apriciate very much that you share your knowledge. My engineering background comes from motorcycle development and i did more than 2000 aerodynamictests on track and road anf few in windtunnel.Thats why I might ask strange questions ;-). On Motorcycles the tiretemperature is often different to the inner air temperature.
I didn’ find a pressure gauge jet, which doesn,t cause a pressure drop. Understanding tiretemperature might avoid annoying pressure measurment and adjustment.
Do you recomment a precise pressure gauge with nice handling?