На эту тему есть интересный форум на MTBR:
29inch Wheeled Bikes Forum
Вот из тамошнего FAQ:
Цитата:
Question: Quick and dirty, give me a list of 29" vs. 26", which wins where, concept-wise?
Answer:
29" Pro's:
Rolling resistance (by some 10%)
Bearing resistance and wear (by some 10%)
Tire wear (by at least 10%)
Roll-over stability climbing and descending
Overall comfort over a ride
Grip and cornering balance
Traction
Pinch-flat resistance
26" Pro's :
Weight (300-400g lighter on the complete hardtail bike, all else being equal)
Due to this weigth advantage : faster acceleration, by around 2%
Wheelies are easier, the front lifts more easily.
Flickability in extremely tight corners (where walking would actually be faster)
Wheel stiffness, at least when using hubs of equal flange spacing
Question: So, 29" rolls better over every type of bump more easily, right?
Answer: Actually, no. Some deeper (roll-through) bumps approach the 29" wheel's size so closely, that it almost remains stuck in them, making it harder to get through them. These bumps, in regular XC riding, don't occur very often, but every wheel size has it's critical bump size. A 36" wheel (it exists!) will just crash into a dirt jump ramp, where 20" will smoothly roll it up, closely following the curve of the ramp. In regular XC, with roots and rocks, a larger wheel in 99% of the instances means you roll over it with greater ease, fewer energy loss, and therefor faster. Brake bumps made by 26" wheels seem like minor bumps when rolling over them with 29" wheels which don't pick up that resonation frequency. By the time everyone rides 29", the bump frequency will probably become 10% lower. This, and the idea that with 29" you can brake later, will reduce the number of brake bumps before a corner. How that rides exactly, a the point this FAQ is written, probably no-one ever even experienced.
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