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#11
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29er "pedals easier"
retroguybilly wrote:
I have a friend who just bought a new 29"-wheel Motobecane MTB and swears that, due to the larger-diameter wheels, it "pedals easier" than his old 26"-wheel MTB did. Have you ever heard anyone say this before? I have. Since the contention does not seem correct to me, I was just curious about how you gentlemen would respond to it? "Glad you like your new ride! Already gathered some Strava data to compare? There are so many more variables beside rim diameter that influence pedaling effort. IIRC, you last inspected the rotten 26"-bike's hubs near the end of the 90-day warranty period. Doesn't matter, let's meet for a ride -- and see if you really go faster with your new 'cane." |
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#12
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29er "pedals easier"
On 7/15/2018 5:09 PM, Oculus Lights wrote:
snip My MTB is still the same 26" rim brake wheels that its had since new in 2000. If it can't roll over the bumps and rocks and ruts and slop I want to roll over, then its the rider, and not the tire diameter that's the problem. While a 29er does not "pedal easier" a larger wheel clears ruts, rocks, etc., easier. It also adds more ground clearance. That's why there was a move to larger wheels on mountain bikes. |
#13
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29er "pedals easier"
Very, very good! Thanks for all your thoughtful opinions. I will tell my friend that his 29er pedals easier because he must be riding over zombies but just doesn't realize it!
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#14
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29er "pedals easier"
On 7/15/2018 10:36 PM, Jeff Liebermann wrote:
... "Bug Out Bike - Apocalypse Bicycle" http://www.instructables.com/id/Bug-Out-Bike-Apocalypse-Bicycle/ I like the paint job. Unfortunately, I couldn't find any advice suggesting that a 29" wheel was in any way superior to smaller wheels for attacking or rolling over zombies. I suspect that the added weight of the survivalist junk might ruin any benefits gained by a few mm larger diameter tire. According to the movies, dead zombies will bleed profusely, which will be too slippery to traverse on slick tires. Instead, I recommend tires with some tread. Or, just build your own 29" zombie crusher from plans: http://www.atomiczombie.com I don't really think the idea of a "disaster bicycle" is really all that good of an idea--but even ignoring that--running 29" tires would be dumb, since 26" is way more common. |
#15
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29er "pedals easier"
On 7/15/2018 3:00 PM, Frank Krygowski wrote:
I might point someone to the book _Bicycling Science_ by Wilson. All things being equal, on typical road surfaces, a larger diameter wheel should roll easier. But for slight differences in diameter, I'd expect the differences in rolling resistance to be slight. ... Among the recumbent riders, it is pretty well known that taller tires do roll easier, since there have been various models of recumbent bikes that could be ordered with 20", 24", 26" and 700c tires, but that were otherwise roughly equivalent. The larger tire diameter is mainly an advantage on bumpy surfaces however. And at higher speeds, aero drag becomes a factor. Some of the Battle Mountain bikes have gone to using front & rear 406mm (20") wheels. Not for rolling resistance, but because the smaller wheels can be contained inside a smaller body shell--and at ~80 mph, aero drag is the biggest problem. |
#16
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29er "pedals easier"
On 7/16/2018 11:11 AM, Doug Cimperman wrote:
On 7/15/2018 10:36 PM, Jeff Liebermann wrote: ... "Bug Out Bike - Apocalypse Bicycle" http://www.instructables.com/id/Bug-Out-Bike-Apocalypse-Bicycle/ I like the paint job. Unfortunately, I couldn't find any advice suggesting that a 29" wheel was in any way superior to smaller wheels for attacking or rolling over zombies. I suspect that the added weight of the survivalist junk might ruin any benefits gained by a few mm larger diameter tire. According to the movies, dead zombies will bleed profusely, which will be too slippery to traverse on slick tires. Instead, I recommend tires with some tread. Or, just build your own 29" zombie crusher from plans: http://www.atomiczombie.com I don't really think the idea of a "disaster bicycle" is really all that good of an idea--but even ignoring that--running 29" tires would be dumb, since 26" is way more common. I changed my mind about that. 26" seemed to me, a medium sized Italian guy, about right for offroad/technical riding; lower to the ground, effectively smaller gearing, shorter top tube and all that. My opinion changed once I saw a full sized (muscular 6'5") rider on a his new 700-54 Gunnar. That said, women just over five feet who ride in with whatever new chinese 29-inch thing the local outlet store foisted on her looks bizarre to me if not dorky. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#17
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29er "pedals easier"
On 7/16/2018 8:48 AM, sms wrote:
On 7/15/2018 5:09 PM, Oculus Lights wrote: snip My MTB is still the same 26" rim brake wheels that its had since new in 2000.Â* If it can't roll over the bumps and rocks and ruts and slop I want to roll over, then its the rider, and not the tire diameter that's the problem. While a 29er does not "pedal easier" a larger wheel clears ruts, rocks, etc., easier. It also adds more ground clearance. That's why there was a move to larger wheels on mountain bikes. No, bigger wheels do not necessarily mean more ground clearance. That's a function of frame design. -- - Frank Krygowski |
#18
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29er "pedals easier"
sms wrote:
My MTB is still the same 26" rim brake wheels that its had since new in 2000. If it can't roll over the bumps and rocks and ruts and slop I want to roll over, then its the rider, and not the tire diameter that's the problem. While a 29er does not "pedal easier" a larger wheel clears ruts, rocks, etc., easier. It also adds more ground clearance. That's why there was a move to larger wheels on mountain bikes. How big is a "29er"? I think bikes in general should have bigger wheels. Why not drop the 622 standard (700C) and go back to 630? Only it can/should be wider than the 32 of the 27x1-1/4 old road bike standard. Or even to 635 but with modern rims, of course. -- underground experts united http://user.it.uu.se/~embe8573 |
#19
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29er "pedals easier"
Frank Krygowski wrote:
No, bigger wheels do not necessarily mean more ground clearance. That's a function of frame design. Bigger wheels are much better. Try a 630 bike after your 622 and feel the difference. Or likewise try a 584 after the 622 and feel it getting even worse. Again, how big exactly are the 29 wheels? I ask because in the MTB bike world aren't both 26 and 27.5 actually 584 or 650B? -- underground experts united http://user.it.uu.se/~embe8573 |
#20
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29er "pedals easier"
On 7/16/2018 1:25 PM, Emanuel Berg wrote:
Frank Krygowski wrote: No, bigger wheels do not necessarily mean more ground clearance. That's a function of frame design. Bigger wheels are much better. Try a 630 bike after your 622 and feel the difference. Or likewise try a 584 after the 622 and feel it getting even worse. Again, how big exactly are the 29 wheels? I ask because in the MTB bike world aren't both 26 and 27.5 actually 584 or 650B? 29" is 622mm, the same as a 700c. 29" is just made to mount fat tires. The difference between 584mm/650b and 27.5" is that the 27.5 frames are made to mount wider tires,,, I think up to 3" wide? Plus still have decent mud clearance on both sides (1/2" or so). |
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