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


Go Back   > >

Mountain Biking Mountain biking is one of the fastest growing sports in the world. Check out this forum to discuss the latest tips, tricks, gear and equipment in the world of mountain biking.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 03-15-08, 10:34 PM   #1
Robbykills
Hi. I'm in Delaware.
Thread Starter
 
Robbykills's Avatar
 
Join Date: Nov 2004
Location: Newark, Delaware
Bikes: 1985 Schwinn Voyageur, 1991 Miyata 700GT, LMNO custom track (www.lmnocycles.com), 1991 Tommasini road, 1999 Gary Fisher Mt. Tam SS, Dirt Research Kobuck, 1996 Diamondback Outlook (s***kicker)
Posts: 518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
problem with single speed drivetrain

So I have an MTB converted to single speed with a pyramid tensioner, surly cog and I've tried two different cranks. The problem has been the same each time.

As I put pressure on the pedals to accelerate the drive train skips and makes a "KLUNK KLUNK!" I can't figure out what it could be. I figured maybe the chainline was off so I got a narrower bottom bracket. The chain line seems to be alright and the chain isn't too slack or too tight. What do you guys think is doing this?

Oh, I'm also going to post this to bike mechanics too.

Thanks
= ]
Robbykills is offline   Reply With Quote
Old 03-15-08, 11:27 PM   #2
Robbykills
Hi. I'm in Delaware.
Thread Starter
 
Robbykills's Avatar
 
Join Date: Nov 2004
Location: Newark, Delaware
Bikes: 1985 Schwinn Voyageur, 1991 Miyata 700GT, LMNO custom track (www.lmnocycles.com), 1991 Tommasini road, 1999 Gary Fisher Mt. Tam SS, Dirt Research Kobuck, 1996 Diamondback Outlook (s***kicker)
Posts: 518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
the chainring and chain are brand new, the cog was bought used but appears to be fine, only cosmetically it's flawed with some chain grease, it doesn't look excessively worn though. I'll try it out with a different cog and see if it makes a difference. thanks!
Robbykills is offline   Reply With Quote
Old 03-15-08, 11:28 PM   #3
Robbykills
Hi. I'm in Delaware.
Thread Starter
 
Robbykills's Avatar
 
Join Date: Nov 2004
Location: Newark, Delaware
Bikes: 1985 Schwinn Voyageur, 1991 Miyata 700GT, LMNO custom track (www.lmnocycles.com), 1991 Tommasini road, 1999 Gary Fisher Mt. Tam SS, Dirt Research Kobuck, 1996 Diamondback Outlook (s***kicker)
Posts: 518
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(oops I think I accidently deleted the response post?)
Robbykills is offline   Reply With Quote
Old 03-15-08, 11:44 PM   #4
PhattTyre
Senior Member
 
Join Date: Nov 2004
Location: Portland, OR
Bikes: 07 Fisher Paragon, 00' Lemond Buenos Aries, Specialized Langster, Schwinn World Sport SS townie, 99 SS-Works single speed conversion, early 90s Raleigh roadie rain bike, 07 Fisher Rig, Trek 520, and a home-modified chopper
Posts: 707
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The *clunk clunk* is the chain slipping on the cog or chainring (probably cog). It could be a wear issue, or you might just be running too long a chain. If the chain is too long it won't wrap the cog enough and it'll slip. See if you can take a link out to get the chain as short as possible.
PhattTyre 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 07:40 AM.