For any cyclist who has ever tinkered with their bike, Sheldon Brown was one of the best resources for information that went against the common logic. He debunked rumors regarding almost anything related to a bike, from frames, to drivetrains, to language translations gone awry. He was deeply opinionated – often stubbornly so – but also was willing to hear out others’ arguments, both in person and at places like BikeForums. Much like the arguments surrounding Harald Harb’s PMTS ski teaching method, Sheldon had as many foes as fans, but he almost always “made nice” in the end.

So the news of his death is disheartening, to say the least.

He’d battled multiple sclerosis since the turn of the century, and kept a fairly detailed journal of his issues since being properly diagnosed in 2005. Even though he was sidelined from the bike starting in September 2006, his fighting spirit remained intact, and he continued to share his wisdom about cycling and life with his fans.

So rest in peace, Sheldon Brown. The cycling world owes you a debt of gratitude.