Why are bicycle wheels the sizes they are (besides the need for standardization)? ~27" for road bikes, ~26" for most mountain bikes, smaller for BMX.
What's the advantage/disadvantage of a larger wheel? It seems to me that a larger wheel gives a bicycle larger gear-inches, without increasing the size of the chainrings, and provides more rotational kinetic energy to each wheel (giving it extra energy to roll over a bump or something). The disadvantage would be greater weight I suppose.
Anybody have a good scientific answer for me?
(Sorry, but I'm on a bicycle physics kick. I've been reading about steering geometry and this fascinating article about "trail" and its effect on stability, oh ya and this site too.)