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  1. #1
    Senior Member slide23's Avatar
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    Slower in Cold Weather

    Where does all the speed go when the weather is cold? Anyone running a power meter to determine where the losses are or is it mostly psychological?

    My PRE and heart rate are higher in cold weather, but I tend to lose about 3 MPH off my average speed when it is cold. Denser air? Increase in rolling resistance? Power losses due to resistance of clothing? Calories being used to maintain body heat? All in the head?

    Anyone else losing significant speed in the cold?
    "Life shrinks or expands in proportion to one's courage." - Ana´s Nin

  2. #2
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    There was a recent post on this: Effects-of-cold-on-performance-(and-eyes)

    I think all of those points you mentioned plus obviously snow and ice where applicable.

    For me most of the loss of speed comes from heavy boots and studded tires.

    Also it depends what you mean by cold. I was timing myself on a 5km out and back ride several times a week when it was above freezing and I don't think my average was much different down to about 5 Celsius.
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    semper ubi sub ubi

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