Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Newbie
    Join Date
    Sep 2006
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    The difference a chain makes

    I'm looking for a commuter bike to take me about 10->20km a day in good weather.

    I tried a few Dahons earlier this week. I don't have a bias towards any particular brand -- I just started with the 'local shop' and their selection. I'm apartment-bound and close to public transit in case I'd like to avoid the rain -- storage and portability are my motivations for trying out a foldable. ...and there was a 'fun factor' that I got from hopping on the smaller wheeled bikes that wasn't there on full sized machines.

    I found the rides a little too bumpy for my liking (Mariner, and especially Mu SL, the Cadenza to a lesser extent due to larger wheel size), so I tried out a Jetstream P8 (a model with suspension) -- it made for a very smooth ride.

    The only downside (compared to a couple full-sized bikes I tried with mid-range shimano components) was that I could "feel" the chain while pedalling. I read a review elsewhere on the Jetstream P8 in stock configuration, and its performance after a rolhoff conversion. The writer also made comments about 'feeling every link in the chain' or something to that effect in its stock configuration.

    This is likely not a problem specific to foldables, but... how much difference could swapping the chain alone make to the bike? Would it be possible to smooth out the ride with a few extra dollars spent on a chain and a bit of fiddling with the derailleur, or is it more likely a full component upgrade is required to smooth things out? Could it be that the chain just needs to be broken in a bit? Any riders out there that have faced similar issues?

    Thanks in advance for any advice!

  2. #2
    To fold or not to fold?
    Join Date
    Aug 2006
    Location
    Hampstead
    My Bikes
    Mezzo, DT IXFS, Raleigh 20 (soon...)
    Posts
    192
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Assuming you haven't already, before swapping the chain, degrease it and pour over a load of White Lightening dry lube and check out whether it still feels as bad.

  3. #3
    Senior Member
    Join Date
    Mar 2006
    Posts
    2,013
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    What does feel the chain mean? Does it happen in all the gears or just the lowest or highest? Is the front chain ring very large?

    Does it really bother you? You might only be noticing it because of the review you read (not trying to be mean).
    2000 Montague CX, I do not recommend it, but still ride it.
    Strida 3, I recommend it for rides < 10mi wo steep hills.
    2006 Rowbike 720 Sport, I recommend it as an exercise bike.
    1996 Birdy, Recommend.
    Wieleder CARiBIKE (folding), decent frame.

  4. #4
    Newbie
    Join Date
    Sep 2006
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I dug around and found the review after I'd tried the bike, so it didn't injected a bias...

    It just didn't feel smooth while pedaling -- or as smooth as the other bikes I'd tried. I describe the problem as related to the chain because that was my best guess as to what would cause the bitty vibration I noticed while turning the crank. It was there regardless of gear.

    I suspect a better lubricant would be worth a shot... I'll post a follow-up on whether it helped.

  5. #5
    All ur bike r belong Enki james_swift's Avatar
    Join Date
    Aug 2005
    Location
    San Fransicko
    Posts
    816
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Check the bottom bracket first. If the the bike shop will let you, derail the chain from the chainring and spin the crank. Can you feel any grinding?

    The vibration could also be coming from the derailleur pulleys. If the problem really is with the chain, then it's possible that the chain width doesn't precisely match the teeth on either the chainring or the cogs (or derailleur pulleys).

  6. #6
    Car free since 1995 pm124's Avatar
    Join Date
    Sep 2006
    Location
    NYC
    My Bikes
    Birdy Yellow, Birdy Monocoque
    Posts
    1,004
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I would just ask the bike store to adjust the rear derailleur. The chain could also be hitting the chain guide (the little plastic thing on the front that keeps it from falling off) or the frame. Are you in NYC? If so, try the shop at 110 and Central Park West, they have a Jestream P8 there.

    I have a Mu SL, and it does ride very hard. But it's a road bike, so it's supposed to. (Where did you find one?) If you are only commuting and don't plan on longer rides, a full suspension bike makes a lot of sense, especially if you don't have to carry it a good deal. The smoothest ride at a light weight is the Birdy, but it will set you back $150 more than the Jetstream. They have the basic Red at NYCewheels for $950.
    Last edited by pm124; 09-30-06 at 06:46 AM.

  7. #7
    Senior Member
    Join Date
    Mar 2006
    Posts
    2,013
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    "It was there regardless of gear. "

    Are you are pedaling at the resonant frequency of the chain? It's unlikely but could it be the RPMs of your pedaling. Is there a peak in the vibrations, if you pedal faster or slower from the peak vibratiions does it get less and less?
    2000 Montague CX, I do not recommend it, but still ride it.
    Strida 3, I recommend it for rides < 10mi wo steep hills.
    2006 Rowbike 720 Sport, I recommend it as an exercise bike.
    1996 Birdy, Recommend.
    Wieleder CARiBIKE (folding), decent frame.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •