Gave my new heated grips the run through this morning as well - went out in minus 1.4 degrees, travelled 70km at highway speed, and the hands survived much better than without the grips. The outside edges did still get cold but last time I did this run without the grips both hands were stone dead by the time I got finshed. To the point where I couldn't feel the hand levers either...a little disconcerting, that.
Another benefit that I wondered about but had not expected, happened as well. My right palm has, as a result of surgery, quite a lot of scar tissue in it, and a constant hold on the throttle tends to cause the right hand to lose sensation. The scar tissue, I think, compresses either nerves or perhaps blood vessels with resultant loss of feeling. The heated grips have made this much less of a problem as well. I did 150km yesterday afternoon, which would usually see me having to let go the throttle and shake the hand back to life several times over. Didn't happen at all with a little extra heat in the palm.
So its not just the cold that they help with.
. “No pleasure is worth giving up for two more years in a rest home.” Kingsley Amis
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