turbo
All-Mountain Rider
Posts: 157
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Post by turbo on Oct 19, 2006 16:21:10 GMT 8
Hi guys.
I know there aren't many 29" mtbs in the Phils. (if any).
I was just wondering what would be the ideal gearing for a 29" SS mtb.
thanks.
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Post by king on Oct 19, 2006 18:43:25 GMT 8
jonas, agu uses 32x18 on his karate monkey. Hi guys. I know there aren't many 29" mtbs in the Phils. (if any). I was just wondering what would be the ideal gearing for a 29" SS mtb. thanks. |
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turbo
All-Mountain Rider
Posts: 157
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Post by turbo on Oct 19, 2006 20:16:45 GMT 8
so same gearing with his 26". cool. (i read in mtbr that you should increase gear size by 10% or whatever ratio since the wheels on a 29" are 10% bigger. but their explanations were a bit confusing). so i guess agu exerts less effort now that he has bigger wheels (less rolling resistance; all things being equal, of course)? or more effort since the wheels are heavier? hmmm.
are there a lot of 29ers here? seems like a good concept: 29" SSers. back to basics, especially if the bike's a rigid. i wonder if the trend will catch on here.
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Post by extraFunky on Oct 19, 2006 21:14:47 GMT 8
If you're coming from a 26" ss, just add 2 teeth to your rear cog to get about the same gear-inch ratio on a 29er.
Gear inch = (Diameter of drive wheel in inches) x (# of chain ring teeth)/# of cog teeth
I'm running 32x20.
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Post by king on Oct 20, 2006 1:05:24 GMT 8
i've only seen one other 29er here, and a single speed at that. noel (nvp) has an on one inbred 29er. he's also using 32x18 i think.
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turbo
All-Mountain Rider
Posts: 157
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Post by turbo on Oct 20, 2006 6:15:28 GMT 8
If you're coming from a 26" ss, just add 2 teeth to your rear cog to get about the same gear-inch ratio on a 29er. Gear inch = (Diameter of drive wheel in inches) x (# of chain ring teeth)/# of cog teethI'm running 32x20. this so far has been the simplest equation I've seen on the net to calculate gear ratios. kudos to you, brad. |
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Post by OnebyOne on Oct 20, 2006 9:06:19 GMT 8
32x19 on a 29'er is similar to 32x16 on a 26'er with a Gear Inches are 51.6 and 52 respectively...  However the 29'er is easier to climb once you get your momentum... |
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Post by 32by18 on Nov 11, 2006 22:29:50 GMT 8
hi guys
sorry for the late replies, been real busy of late...
Turbo, to address your question:
"so i guess agu exerts less effort now that he has bigger wheels (less rolling resistance; all things being equal, of course)? or more effort since the wheels are heavier?"
It does take a bit more to get the 29" up to speed, but once there, maintaining momentum is a bit easier. My estimate is 10km/h (sorry don't have a cyclocomp), is the 'threshold' for velocity...
So those real-slow-speed, close-to-stalling climbs really whip my butt hehe
Compared to my old ride, I had to change my riding style. On an SS, preserving momentum is key - even more so now that it's a 29er. Cornering also is a bit different, one steers more with your hips and body weight, rather than with handlebar input.
Feel free to shoot any questions my way
agu
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Post by 29er on Nov 12, 2006 20:43:13 GMT 8
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Post by 32by18 on Nov 14, 2006 22:54:47 GMT 8
yup. The Trek 69er and the Carver 96er are interesting derivatives indeed. One can theoretically build up a 96er using a 26" hardtail frame...IF the angles are correct, and the fork offset, etc as well...
I do hope the 29er catches on here in the Philippines....more big manufacturers are jumping on the bandwagon...
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Post by edp773 on Jan 2, 2007 1:25:19 GMT 8
The 29er has pretty much been distributed by Trek's Gary Fischer line here in the US. The popularity is rising. As mentioned the weight of the wheels makes acceleration a little slower, but rolling over or through obstacles is better, and supposedly climbing is better.
I really like the idea of the 69er using the best of both systems, but only know of a couple people who have built them. One used the karate monkey fork on a Raleigh frame.
Good luck with your SS 29er.
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Post by hotsauce on Jan 6, 2007 9:31:12 GMT 8
just wanna ask 29er is 700c din ba??? same lng un?
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Post by extraFunky on Jan 6, 2007 11:02:21 GMT 8
29er = 700c + fat tires check out this thread for the 29er history. |
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turbo
All-Mountain Rider
Posts: 157
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Post by turbo on Aug 4, 2007 10:30:04 GMT 8
hmmm. forgot about this thread. still don't have a SS, BUT i've started riding my fs geared bike without shifting (it's a b1tch resisting the urge to shift). i've been planning and planning to build a SS rig but the parts are much more expensive here in Oz compared to the phils. hope to finally build that ss ssoon...
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