Go Back   English Forum Switzerland > Activities > Sports / Fitness / Beauty / Wellness  
Reply
 
Thread Tools Display Modes
  #1  
Old 09.08.2011, 09:01
jako's Avatar
Forum Veteran
 
Join Date: Jul 2008
Location: Richterswil
Posts: 865
Groaned at 5 Times in 4 Posts
Thanked 513 Times in 283 Posts
jako has a reputation beyond reputejako has a reputation beyond reputejako has a reputation beyond reputejako has a reputation beyond repute
29" MTB - what's the big deal?

So I am thinking about replaying my Giant Trance (may come up for sale here later) and get back into MTB'ing. I mainly like doing XC and would like to do a couple of Marathon / Enduro events...

Now, since I bought my the Trance, something seems to have happened in the wold of MTBs, the wheels are getting bigger! What's the deal with 29"? When / why / for what typing of MTBing would you choose 29" over 26"?
Reply With Quote
  #2  
Old 09.08.2011, 09:39
TitanTurbo10's Avatar
Forum Veteran
 
Join Date: May 2011
Location: Germany
Posts: 585
Groaned at 1 Time in 1 Post
Thanked 748 Times in 306 Posts
TitanTurbo10 has a reputation beyond reputeTitanTurbo10 has a reputation beyond reputeTitanTurbo10 has a reputation beyond reputeTitanTurbo10 has a reputation beyond repute
Re: 29" MTB - what's the big deal?

Bike Radar has this article. The forums on there probably have more info.
Reply With Quote
This user would like to thank TitanTurbo10 for this useful post:
  #3  
Old 09.08.2011, 09:56
kern's Avatar
Junior Member
 
Join Date: Oct 2010
Location: vaud
Posts: 31
Groaned at 0 Times in 0 Posts
Thanked 8 Times in 7 Posts
kern has no particular reputation at present
Re: 29" MTB - what's the big deal?

There are thousand of debates over 29er vs. 26 or even hybrids like 69er on the net.

Main thing is, in the USA, where this trend started few years ago, most people were tall enough for trying a 28" wheel with a fat type which resulted in so called a 29er. The fact that this started to be a cool thing there the 29er spread and many mtb enthusiasts were looking for these bikes. They claim that a 29er is better because 'the bigger the wheel the faster it goes' and it has more momentum. However, the added weight on the wheels is affecting the agility and on technical tracks this is what matters the most (that's why they use 24" wheels on DH), and of course it's a pain to ride a 29er if you're not at least 1.80m. But the biggest problem with the 29ers is that you don't have many options in therms of frames, forks, tires... finding a tube for a 29er in the local shop can be a hard job sometimes.



Quote:
Advantages

  • Larger wheels roll over obstacles more easily due to decrease in approach angle
  • The larger wheels tend to raise the allowable height of the bottom bracket, cranks and chain wheels improving ground clearance
  • The larger diameter wheels have more angular momentum so they lose less speed to obstacles and rough sections
  • 29" bikes tend to offer taller riders a more "natural" frame geometry[7]
Most of these claims have yet to be objectively investigated. Small scale, unpublished studies (including one done by Pepperdine University, reportedly at the request of Gary Fisher) exist but both proponents and detractors of 29" wheels are generally unimpressed with their scientific rigor. Long debates over how to conduct a "fair" test of the efficiency of 29" vs 26" mountain bikes have raged online, but no serious efforts have been made to conduct a large-scale, scientific study.
[edit] Drawbacks

  • Increased wheel weight and rotating mass (the spokes, rim, and tire are all larger) makes the wheels harder to accelerate and harder to brake
  • More force needed to change steering angle due to greater mass and longer contact patch.
  • Longer spokes and increased angle between hub flange and rim result in a more laterally flexible wheel.
  • Many types of bicycle tires, rims and forks do not come in 29"-compatible versions, though the expanding popularity of the size is reducing this problem.
  • Smaller riders (i.e. less than 5'5" tall) may not be able to find a 29" bike with a geometry suitable for them. Numerous examples exist of custom bikes built for very small riders with 29" wheels, but in many cases smaller riders face significant geometry tradeoffs, especially with regard to toe overlap, handlebar height, and standover.
Wikipedia
Reply With Quote
The following 2 users would like to thank kern for this useful post:
  #4  
Old 09.08.2011, 09:58
BasP72's Avatar
Forum Veteran
 
Join Date: Mar 2008
Location: Adliswil (close to Zurich)
Posts: 1,932
Groaned at 89 Times in 43 Posts
Thanked 1,785 Times in 852 Posts
BasP72 has a reputation beyond reputeBasP72 has a reputation beyond reputeBasP72 has a reputation beyond reputeBasP72 has a reputation beyond reputeBasP72 has a reputation beyond repute
Re: 29" MTB - what's the big deal?

I'm counting the days until the 2012 models from Trek come out (anyone have any idea when this is ?). I'm vertically challenging (1m92) and want to get a 29-er with the new 23" frame. The reason for wanting a 29 is simple: 26" wheels look silly in a big frame , 29" looks better proportioned. I use my bike mostly on the road with the occasional mild off-road ....
The biggest thing I would worry about when chosing a 29" over a 26" is the increased distance travelled for the same gearing -> going uphill will be more difficult. 22/32 on a 26" = 1.43 meter per crank turn, 22/32 on a 29" (which is actuall 28") = 1.54 meter travelled. This is the same as 22/30 on a 26", you basically loose your lowest gear when chosing the 29" wheels.

Attached is a picture of my current bike to show the sillyness of the 26" wheels...
Attached Thumbnails
29-mtb-what-s-big-deal-dsc00065.jpg  
__________________
Happiness is a full tank of gas (or better yet, diesel !)

Last edited by BasP72; 09.08.2011 at 10:22.
Reply With Quote
This user would like to thank BasP72 for this useful post:
  #5  
Old 09.08.2011, 10:10
Eire's Avatar
Forum Legend
 
Join Date: Feb 2007
Location: Tir na nÓg
Posts: 3,628
Groaned at 54 Times in 35 Posts
Thanked 2,388 Times in 1,209 Posts
Eire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond repute
Re: 29" MTB - what's the big deal?

Quote:
View Post
So I am thinking about replaying my Giant Trance (may come up for sale here later) and get back into MTB'ing. I mainly like doing XC and would like to do a couple of Marathon / Enduro events...

Now, since I bought my the Trance, something seems to have happened in the wold of MTBs, the wheels are getting bigger! What's the deal with 29"? When / why / for what typing of MTBing would you choose 29" over 26"?
Which is it? Endoro or Marathon? For non-technical Marathons with not too much climbing a 29er might be a good option depending on the terrain. For an Enduro race (Only timed when descending on usually quite technical terrain but still need to be able to pedal to the start of the stages) a 26" with a slack head angle and about 160mm of travel will always win.
Reply With Quote
This user would like to thank Eire for this useful post:
  #6  
Old 09.08.2011, 10:19
jako's Avatar
Forum Veteran
 
Join Date: Jul 2008
Location: Richterswil
Posts: 865
Groaned at 5 Times in 4 Posts
Thanked 513 Times in 283 Posts
jako has a reputation beyond reputejako has a reputation beyond reputejako has a reputation beyond reputejako has a reputation beyond repute
Re: 29" MTB - what's the big deal?

Quote:
View Post
Which is it? Endoro or Marathon? For non-technical Marathons with not too much climbing a 29er might be a good option depending on the terrain. For an Enduro race (Only timed when descending on usually quite technical terrain but still need to be able to pedal to the start of the stages) a 26" with a slack head angle and about 160mm of travel will always win.
Sorry, should have been more specific. Marathon / long XC "races". Although, I will of course also try to join some of your trips (once I get fitter again). So as usual, like most, I want the bike to be kind of a swiss army knife...
Reply With Quote
  #7  
Old 09.08.2011, 10:29
BasP72's Avatar
Forum Veteran
 
Join Date: Mar 2008
Location: Adliswil (close to Zurich)
Posts: 1,932
Groaned at 89 Times in 43 Posts
Thanked 1,785 Times in 852 Posts
BasP72 has a reputation beyond reputeBasP72 has a reputation beyond reputeBasP72 has a reputation beyond reputeBasP72 has a reputation beyond reputeBasP72 has a reputation beyond repute
Re: 29" MTB - what's the big deal?

Quote:
View Post
I want the bike to be kind of a swiss army knife...
like this ? I actually have one of these, they're excellent for bringing in the car on camping holiday or far-away from home rides

Reply With Quote
This user would like to thank BasP72 for this useful post:
  #8  
Old 09.08.2011, 10:31
Eire's Avatar
Forum Legend
 
Join Date: Feb 2007
Location: Tir na nÓg
Posts: 3,628
Groaned at 54 Times in 35 Posts
Thanked 2,388 Times in 1,209 Posts
Eire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond reputeEire has a reputation beyond repute
Re: 29" MTB - what's the big deal?

Quote:
View Post
Sorry, should have been more specific. Marathon / long XC "races". Although, I will of course also try to join some of your trips (once I get fitter again). So as usual, like most, I want the bike to be kind of a swiss army knife...
Unless you are quite tall... In my opinion a Swiss Army Knife for Switzerland would be a 150mm travel bike 26" wheeled bike with about a 68deg head angle. You should be able to get one of these at between about 11 and 13kg so they are ok to do longer XC stuff on, but will still be ridable on almost any terrain the alps can throw at you.

Shop around for manufacturers. What a lot of them do is just put longer travel on XC geometry and then the bike will not be as good on the rough stuff as a bike with tailored geometry. i.e slacker head angle than an XC bike but with a relatively upright seat angle to make pedalling and climbing easier. The top tube will need to be lengthened a bit to accommodate this and allow for a shorter stem to be used which will help a little with control.

If you are very tall, then I am starting to see the appeal of 29ers. Someone brought a stumpy 29er on a ride I guided a few weeks back and he seemed to do pretty well on it. It was a true all mountain kind of day too. Nearly all single track, about 800m of uphill at times quite technical, a bit of carrying and a long and technical descent at the end.

As for 2012 bikes, Eurobike is on in a few weeks. The public day is the 3rd of September and all the 2012 stuff will be there to see. Beware though, the public days get VERY crowded.
__________________
This message is a natural product. The variations in spelling and grammar enhance it's individual character.

Interested in skiing, Snowboarding or Mountain Biking in Switzerland? Information in English available
here.


Reply With Quote
This user would like to thank Eire for this useful post:
  #9  
Old 11.08.2011, 15:23
California Dreamer's Avatar
Forum Veteran
 
Join Date: Mar 2007
Location: Zurich
Posts: 1,082
Groaned at 209 Times in 101 Posts
Thanked 1,217 Times in 623 Posts
California Dreamer is considered unworthyCalifornia Dreamer is considered unworthyCalifornia Dreamer is considered unworthyCalifornia Dreamer is considered unworthy
Re: 29" MTB - what's the big deal?

Quote:
View Post
I'm counting the days until the 2012 models from Trek come out (anyone have any idea when this is ?). I'm vertically challenging (1m92) and want to get a 29-er with the new 23" frame. The reason for wanting a 29 is simple: 26" wheels look silly in a big frame , 29" looks better proportioned. I use my bike mostly on the road with the occasional mild off-road ....
The biggest thing I would worry about when chosing a 29" over a 26" is the increased distance travelled for the same gearing -> going uphill will be more difficult. 22/32 on a 26" = 1.43 meter per crank turn, 22/32 on a 29" (which is actuall 28") = 1.54 meter travelled. This is the same as 22/30 on a 26", you basically loose your lowest gear when chosing the 29" wheels.

Attached is a picture of my current bike to show the sillyness of the 26" wheels...
It wouldnt look so silly if your stem wasnt the size of a telephone pole. My god, I have never seen one that long. Your frame is waaaay to small for you if you need a stem that long. If you must have a 29er than I would suggest a niner as they seem to have rave reviews. If 29ers were that much better that 26ers then why are the majority of UCI XC racers still racing on 26ers? Also 29ers have a bad reputaion for folding over in rough terrain. They suck at side impacts.
Reply With Quote
Reply




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
What's the deal with the flaglets on public transport (Zürich) pabcbc Daily life 4 09.05.2010 12:10
Getting ready for the "Big Move"! CrossFit James Introductions 1 03.05.2009 20:56
What is the big deal about Channel 4? Starbug TV/internet/telephone 37 12.09.2008 08:44


All times are GMT +2. The time now is 23:32.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
LinkBacks Enabled by vBSEO 3.1.0