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Why are 700c wheels the standard for road cycling? Is the stability granted by enhanced gyroscopic effect over smaller wheels really that important? I think this could be less significant when accounting for modern wider tires that maximize their contact patch. I think the weight savings afforded by 650b could be a potential boon to performance, but it would limit the heat dissipation surface on rim brakes and wear more quickly. Modern 650b is being more pitched to the gravel crowd so they can run fatter tires so I'm not even sure there are any truly lightweight options or rim brake compatible models available. At best they would certainly not be as ubiquitous as more standard wheel choices.
