While riding the bicycle on a flat road in 2-6 (shimano)gear the distance covered is different from 3-8 gear. But to ride in higher 3-8 gear it needs more energy than lower 2-6 gear. In online calorie counter the distance and time are only needed to measure the calories spent but not the gear or wheel diameter or tyre width. So please suggest the formula to calculate the calories spent on shimano 8gear system
The mechanical energy spent depends only on friction (i.e on speed) and the height gain (when in the mountains). Therefore, it does not depend on the gear you are using, but on your actual speed and the road slope. The burned calories depends in addition on the metabolic efficiency, which varies among individuals.
Roughly, the energy requirement when cycling is about 6 kcal/min or 400 W (from the Ciba Geigy Scientific Tables 1970). It could however be as low as 200 W when cycling quietly and as high as 700 W if you are a champion.
I totally agree with the argument of Claude-Alain Roulet. Energy consumption in cycling: both en route and in XCO (BTT) not depend on the number of crankset (Chainring sizes) and cassette used in cycling.
It is a clear example of the cassette and chainring sizes and are not representative. For example: in BTT SRAM XX1 with a chainring sizes (28T) and XG-1199 (10-42) cassette; It is the most used in the world championship.
With this trend in consumption may be the same as when a double chainring sizes is used as SRAM X9 or M8000 Deore XT (sizes Chainring 38-28T) and cassette 11 speed; as it regards the BTT.
It is clear that energy is not focused on the components of the transmission and not directly influence it.
This url can be useful: http://www.bike-riding-guide.com/biking-calories.html
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