Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-05-13, 08:59 PM   #1
GeraldF
Senior Member
Thread Starter
 
Join Date: Jun 2012
Location: Washington, DC
Bikes:
Posts: 173
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Chain guard for a 21-speed: Is it possible?

I'd like to outfit a 21-speed mountain bike with some sort of chain guard that will achieve the goal of keeping pants away from the chain.

Does such a product exist? If not, has anyone jury rigged such a contraption? Thanks.
GeraldF is offline   Reply With Quote
Old 04-05-13, 09:39 PM   #2
GeraldF
Senior Member
Thread Starter
 
Join Date: Jun 2012
Location: Washington, DC
Bikes:
Posts: 173
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Looks like I may have found the answer to my own question. Why on earth don't all 21-speeds come with a chain guard like this???
Attached Images
File Type: jpg Screen Shot 2013-04-05 at 11.37.04 PM.jpg (79.4 KB, 70 views)
GeraldF is offline   Reply With Quote
Old 04-06-13, 05:59 AM   #3
wahoonc
Senior Member
 
wahoonc's Avatar
 
Join Date: Jan 2005
Location: On the road-USA
Bikes: Giant Excursion, Raleigh Sports, Raleigh R.S.W. Compact, Motobecane? and about 20 more! OMG
Posts: 16,687
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Quote:
Originally Posted by GeraldF View Post
Looks like I may have found the answer to my own question. Why on earth don't all 21-speeds come with a chain guard like this???

'cause it costs money? Dutch Bike Bits sells a couple of different ones. I have a German Staiger that came with one, however the plastic on it was broken, unable to source replacement, eventually I may build a replacement out of aluminum.

Aaron
__________________
Webshots is bailing out, if you find any of my posts with corrupt picture files and want to see them corrected please let me know. :(

ISO: A late 1980's Giant Iguana MTB frameset (or complete bike) 23" Red with yellow graphics.

"Cycling should be a way of life, not a hobby.
RIDE, YOU FOOL, RIDE!"
_Nicodemus

"Steel: nearly a thousand years of metallurgical development
Aluminum: barely a hundred
Which one would you rather have under your butt at 30mph?"
_krazygluon
wahoonc is offline   Reply With Quote
Old 04-06-13, 06:16 AM   #4
GeraldF
Senior Member
Thread Starter
 
Join Date: Jun 2012
Location: Washington, DC
Bikes:
Posts: 173
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I found this on DutchBikeBits.com:


The reviewer says the chainguard fits some bikes, but not others. My 21-speed mountain bike, a GT Aggressor 3.0, has 48 teeth on the outer front ring, which should be compatible, but
the outter bottom bracket can only be a maximum 40 mm to be compatible. I have no idea how big my bottom bracket is. This info doesn't appear to be provided in the specs of the bike. Does anyone know how I can measure my bottom bracket? Thanks.

Alternatively, I found the SKS Chainboard Bicycle Chainguard on amazon. A lot of reviewers love it, but say it was a b**** to install. Most people had to trim it down to size, in multiple places, to get it to fit.

Here's the SKS:
http://amzn.to/14M1O3t

I really appreciate any advice. I'm determined to add a chainguard to my mountain bike.
Attached Images
File Type: jpg Screen Shot 2013-04-06 at 8.04.51 AM.jpg (56.5 KB, 12 views)
GeraldF is offline   Reply With Quote
Old 04-06-13, 08:50 AM   #5
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,951
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Classic alternatives include rolling up the right pant leg or using a strap or rubber band to restrain the cuff of the right pant leg.
Looigi is offline   Reply With Quote
Old 04-06-13, 11:15 AM   #6
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Bikes: Rans Rockst (Retro rocket) Rans Enduro Sport (Retro racket) Catrike 559, Merin Bear Valley (beater bike).
Posts: 26,631
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 92 Post(s)
There's lots of different bike frame/drive train combinations. Don't expect any after market product to bolt up easily and not cause some new, unforeseen problem. Once in awhile it might happen, but not very darn often.

Shop installation of products like that is probably the bargain of the year. Taking an hour or two wouldn't surprise me at all. At typical shop labor costs that would be $60.00 to $120.00.
Retro Grouch is offline   Reply With Quote
Old 04-06-13, 10:13 PM   #7
Velo Dog
Senior Member
 
Join Date: Jun 2004
Location: Northern Nevada
Bikes:
Posts: 3,802
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Looigi View Post
Classic alternatives include rolling up the right pant leg or using a strap or rubber band to restrain the cuff of the right pant leg.
I was going to say this, too. I have a multiple-geared bike with a guard I adapted from a junked cruiser, but a strap on the ankle is a lot easier.
Velo Dog is offline   Reply With Quote
Old 04-06-13, 10:57 PM   #8
xenologer
Senior Member
 
Join Date: Aug 2008
Bikes:
Posts: 2,062
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Yeah, I did a DIY guard when building up a bike for my sister.

guard only covers the upper chain run -does not encircle the chainrings and front derailer
a plastic ring guard integrated with the crankset covers that area instead
this greatly simplifies the project

Took the steel guard from a cruiser, cut length to fit

drilled and bolted on supports; good solid support is a must, because millimeters matter when making the guard clear both the crank arm and triple rings:
2 p-clamps on chain/seat stays up against rear dropout
1 p-clamp at chainstay about 2-3" back from the rings
1 diy support arm and clamp bridging seattube to top of guard
-essentially 3 support points at the 3 corners of the guard

a bottom pull, top swing derailer was used to fit underneath the guard/supports with no cage/cabling interference
xenologer is offline   Reply With Quote
Old 04-07-13, 10:19 AM   #9
DVC45
Senior Member
 
DVC45's Avatar
 
Join Date: Dec 2006
Bikes:
Posts: 3,837
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I got SKS Chainboard on my Winter Commuter and it works great.

DVC45 is offline   Reply With Quote
Old 04-07-13, 10:38 AM   #10
CraigB
Starting over
 
CraigB's Avatar
 
Join Date: Jun 2005
Location: Indianapolis
Bikes: 1990 Trek 1500; 2006 Gary Fisher Marlin; 2011 Cannondale Synapse Alloy 105; 2012 Catrike Trail
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by GeraldF View Post
Looks like I may have found the answer to my own question. Why on earth don't all 21-speeds come with a chain guard like this???
Looks like something cribbed from a table saw.
CraigB is offline   Reply With Quote
Old 04-07-13, 05:13 PM   #11
MichaelW
Senior Member
 
Join Date: Feb 2001
Location: England
Bikes:
Posts: 12,923
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
A lot of Koga Miyata models, esp the everyday bikes, come with 3x8 and chainguards. They are almost impossible to find in bike shops. You could probably make one out of fibreglass. Aluminium may also work.
MichaelW is offline   Reply With Quote
Old 04-09-13, 06:21 AM   #12
pinsonp2 
Senior Member
 
Join Date: Nov 2009
Location: Taylor, MI
Bikes: 2008 Trek 2.1 WSD, 2010 Specialized Amira Elite, 2011 Trek Madone 5.2 WSD
Posts: 121
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you don't need/want the full chain guard, a bash guard might work.

http://www.nashbar.com/bikes/Product...63&cagpspn=pla

P2
__________________
2011 Trek Madone 5.2 WSD
2009 Trek 2.1 WSD
pinsonp2 is offline   Reply With Quote
Old 04-11-13, 04:35 PM   #13
flatlander_48
Cathedral City, CA
 
flatlander_48's Avatar
 
Join Date: Oct 2004
Location: Cathedral City, CA
Bikes: 2016 RITCHEY BreakAway (full Chorus 11), 2005 Ritchey BreakAway (full Chorus 11, STOLEN), 2001 Gary Fisher Tassajara mountain bike (sold), 2004 Giant TRC 2 road bike (sold)
Posts: 1,483
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Quote:
Originally Posted by Looigi View Post
Classic alternatives include rolling up the right pant leg or using a strap or rubber band to restrain the cuff of the right pant leg.
Or a semi-circular metal or plastic clip
Or an elastic and Velcro loop
Or a piece of surgical tubing from a dope fiend neighbor
Or a couple of condoms tied together
Or ...
flatlander_48 is offline   Reply With Quote
Old 05-09-13, 05:45 PM   #14
xtrajack
xtrajack
 
xtrajack's Avatar
 
Join Date: Aug 2008
Location: Maine
Bikes: Kona fire mountain/xtracycle,Univega landrover fs,Nishiki custom sport Ross professional super gran tour Schwinn Mesa (future Xtracycle donor bike)
Posts: 2,058
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I just installed a chainboard on my ride. I got lucky it was even easier to install on my bike than it was installing one on my wife's bike.
xtrajack is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 05:42 PM.