<[email hidden]> wrote in message
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Quoted message said:Thanks for the reassurance, but I still feel a bit worried. It's a
blow out from overheating that bothers me - really don't fancy that
happening on the front wheel of a tandem at speed going down a steep
hill... Plan is to rely on the back brake for controlling speed and
just use the front for actually stopping (our tandem just has two rim
brakes). If the back brake won't control the speed, then we'll stop
and check rim temperatures. I've had a back wheel blow at speed on a
hill on a single (for other reasons) and it wasn't really a problem,
more surprising than anything else.
Controlling speed with just the one brake is a poor plan - it's entirely
possible to find a hill which would cook one rim but would be safe with two.
Experience helps here, but things to do include:
Sit up and let the wind slow you down.
Go quickly if you can - more wind resistance.
Dragging the brakes is bad, although I'll do it sometimes.
Basically you want to lose energy in the form of heat. The hotter the rims
are, the more they'll lose per unit time. So getting them really quite hot
then letting them alone for a bit could well actually result in more heat
dissipation than dragging them while warm. Alternating brakes can work for
this too.
Before you've had experience, probably sensible to check for heat on the way
down and stop if necessary. Otherwise I'd agree on using the back more than
the front, but do use the front and don't be afraid to give it some welly.
And I've never actually blown tyres off, just holed them.
cheers,
clive