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29er "pedals easier"



 
 
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  #11  
Old July 16th 18, 11:12 AM posted to rec.bicycles.tech
Sepp Ruf
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Posts: 454
Default 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  
Old July 16th 18, 01:48 PM posted to rec.bicycles.tech
SMS
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Default 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  
Old July 16th 18, 02:43 PM posted to rec.bicycles.tech
[email protected]
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Default 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!

  #14  
Old July 16th 18, 05:11 PM posted to rec.bicycles.tech
Doug Cimperman
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Posts: 147
Default 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  
Old July 16th 18, 05:17 PM posted to rec.bicycles.tech
Doug Cimperman
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Posts: 147
Default 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  
Old July 16th 18, 05:25 PM posted to rec.bicycles.tech
AMuzi
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Posts: 13,447
Default 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  
Old July 16th 18, 06:17 PM posted to rec.bicycles.tech
Frank Krygowski[_4_]
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Posts: 10,538
Default 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  
Old July 16th 18, 07:17 PM posted to rec.bicycles.tech
Emanuel Berg[_2_]
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Posts: 1,035
Default 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  
Old July 16th 18, 07:25 PM posted to rec.bicycles.tech
Emanuel Berg[_2_]
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Posts: 1,035
Default 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  
Old July 16th 18, 07:32 PM posted to rec.bicycles.tech
Doug Cimperman
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Posts: 147
Default 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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