Good though because they stop you reliably in all conditions
Unless your chain derails or breaks.
and don’t make a horrible mess :)
When you get them really hot the grease gets runny and escapes.
... or you lose the bolt to mount the arm to the chainstay and think, "fuck it, a few cable ties will hold it"
... which they do, until they don't. Then the arm spins and locks up your wheel as you're heading full pelt into the back of a bus.
the arm spins and locks up your wheel as you're heading full pelt into the back of a bus.
This is fine
@hugo7 started
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Unless your chain derails or breaks.
When you get them really hot the grease gets runny and escapes.