HL2037 said:
Is it a coincidence that the good downhillers are often the heavier guys and the guys that keep crashing are often small climbers? If for example Cancellara was going down a mountain as fast as he could and Fränk Schleck was following him in the exact same line, would that even be possible? One would think that just because of the extra weight, the heavier rider would have more friction and thus be able to make sharper turns? Or is it just because the heavy guys are often sprinters, not afraid to die?
Coming from a motorcycling background, weight is as much a hindrance as a help when looking at pure cornering ability. Extra vertical load on the contact patch is overcome by added lateral load (although this changes somewhat over rough surfaces, as a heavier bike is less likely to "skip" and therefore lose traction). A low centre of gravity is far more important, as it keeps the bike more stable and minimizes the amount of lean angle required to achieve the same turning radius.
In the straights, extra weight compared to frontal area will help acceleration and top speed in overcoming wind and rolling resistance.
In my Rabocentric world, I would have nominated Gesink as a terrible descender (he all but lost Paris-Nice on a downhill) up until this years Vuelta when he managed to bridge back a gap to the leaders on a descent.
Lars Boom, on the other hand, I would love to see at full pace. A CX or MTB background, I would think, gives a rider more comfort riding at the limits of traction.