K2 / Proflex Riders Group
General => Tech Forum => Topic started by: tim on April 08, 2006, 06:06:45 am
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has anyone done it?
How about just leaving the rear cluster and using just one chain ring ? I'm thinking about it because my front derailieur it a BITCH to adjust as there are only millimeters between the scres and the swing arm!
Any help would be appreciated....maybe I just need a new front derailieur.... ?
thanks
-tim
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i cant see how you can have such a problem when there are so many 957 riders on here riding about without a problem.
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You've got to ask yourself... How much do I need to shift the front end? Do my trails require that much range? Are 3 front chainrings necessary to get me down the trail, or are they just bling?
I really enjoy my single chain ring 856. (Picture under my old gallery "Will." See last pic in album.)
Took out lots of weight and complexity. Only one shifter! A lot less cable, too.
You'll need either a chain roller or abash guard to keep the chain on, but it's beautifully simple to ride. [smiley=beer.gif]
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yes.
Jeff (on of the UK proflexers) had a singlespeed proflex 957 that he raced at the SS world cup in 2001 in Wales, UK. I also used to use my 856 as a singlespeeder.
great bikes and become ever-so-light with singlespeed.
Use a 32 front chainring on the middle spider and use spacers for a 16T on the rear in the middle as well to get a straight chain. A surly singulator finishes the job to keep the chain tight.
callum
rds
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You can always get your hands on a Rohloff hub...
:P
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I'm still waiting for someone to perfect the "Rohloff hub within the bottom bracket" concept. The hub is awesome, but it's too much unsprung weight for a full suspension frame... Having it in front would be perfect. I know it's been tried, but nobody has marketed it to the masses yet.
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You think about something like that?
(http://idriders.com/proflex/galleries/proflex252/getriebeoffensive.jpg)
the g-boxx 1 is with the roloff
and the g-boxx 2 with a chain/gear device
kalle nicolai is about to get the shifting revolution started.
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And this is the 2004 Nicolai Nucleon TFR Bike with the rohloff as a gearbox (G-Boxx 1)
(http://www.g-boxx.org/english/dateien/inhalt/bikes/img/nuc04side.jpg)
and here the Alutech Wildsau with the G-Boxx 1
(http://www.g-boxx.org/english/dateien/inhalt/bikes/img/alutec-Getriebebike-re-gr.jpg)
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Use a 32 front chainring on the middle spider and use spacers for a 16T on the rear in the middle as well to get a straight chain. A surly singulator finishes the job to keep the chain tight.
The only thing that has stopped me rebuilding the 855 as a single speed has been that I wasn't sure how a singulator would go in conjunction with rear wheel travel.
Now I've read this, I'm getting the shock sorted (just got a fox float RP'3 and am getting an adapter machined) and the bike will be sweet.
cheers.
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Ah the lovely nicolai... Some beautiful engineering and a decent result.
Only two tiny details keeping it from my bike rack (besides the $$$) ::):
That bad boy is OMG heavy.
Still has a chain.
When they get lighter by taking the primary torque reduction gearing out (i.e. the cranks turn the primary gears, not a reduction gear or chain) it will be a rational design.
When the chain is replaced with something 21st century-ish, it will be a "revolution."
Until someone, or some company, spends the time and money to figure this out, it's pretty much a purple anodized biopace experiment headed for the "hmmm... that's interesting" corner of the mountain bike museum.
All that said, I'd still love a Rohloff disk hub on my "other" bike.
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Hi chaps, I think this may be a little lighter according to a mate who`s in the know.
It may start to appear on XC bikes soon its pretty much a carbon gear box. From what he`s managed to find out about it`s quite light too, but he races and writes about DH. Looks interesting though.
Tel. [smiley=beer.gif]
http://www.honda.co.jp/HDTV/MTB/rn01-gearbox/