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If not, has anyone ever measured how hot they get?
They're nowhere near hot enough for combustion.
Skin burns however.............
burned my leg on one which left a near perfect inprint of the rotor on my calf
mine turned purple on a massive descent in andorra one year
As a disc newbie, years ago, I got a nice disc rotor burn on my forearm when picking the bike up by forks and seat tube to put it on the car bike rack as soon as I pulled into the car park at the bottom of a steep hill!
mates went blue on last weeks descent 😆
What size disk for lightly grilled pinkies?
us blokes are talkin about our dics turning blue and purple
I melted a hole in some shorts a few years ago,
1st proper go with a proper bike in Morzine 10+ years ago I go to straighten the bars after a crash and end up with Hayes written on my calf for a month.
Never set fire to anything but I don't put the bike down disc side first in summer here in Oz, too much tinder dry stuff out there.