In article
. com,
"Marz" wrote:

Here's a question, which action produces the most heat, keeping the
brakes on to control speed on a steep hill or letting the bike go and
then jamming on the brakes at the last second to kill the speed?
Laters,

Depends. If it is a fast road descent, you brake very
hard for a short time, then run up to speed again
whereupon the air flow cools the rim before much heat
gets to the tire. On a long slow descent, road or
trail, nothing works. You need to stop and let the
system cool.

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