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more of a forks choice than a brake one
He chose to spend $400 on Jan Heine's centrepull brakes instead of plain old cantis/V-brakes which probably work better. He's paid extra money to give himself less choice and make his frame and forks irreplaceable
Plus he made it 650b then said there is only 1 rim for sale in the world that fulfills his requirements
And then he decided to ride this bike, alone, through the mountains in Morocco in the midst of a global pandemic. 👌
frankenbike-
He chose to spend $400 on Jan Heine's centrepull brakes instead of plain old cantis/V-brakes which probably work better. He's paid extra money to give himself less choice and make his frame and forks irreplaceable
They're based on Mafacs centrepulls, which were made in the millions and therefore easy to find should you need to? They're also not particularly fragile parts so I don't see why the RH version would be.
then said there is only 1 rim for sale in the world that fulfills his requirements.
Not quite what he said, plus I can think of 3 other brands that do 650b rim brake rims. He'll be fine for the next 20 years of riding he has ahead of him, the same way some people are still riding 27 1/4 wheels in 2020.
Lolo
As @Tijs pointed out, it's more of a forks choice than a brake one (there are very valid reasons not to want steel disc ones).