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  1. #1
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    cannondalet800 2005

    Recently I had my bike rebuilt from the cycle shop that deals with cannondale.
    What I had them do was a new inner chain ring, new cassette, new chain, new shifters and cables, tires and a complete tuneup.

    I had to ajust the barrel ajuster behind the deraileur because my chain skip a few gears within the center portion of the cassette.
    After one anti clockwise quarter turn the problem was solved. I also had a new bottom bracket installed.

    Now I seem to have a crank noise after every rotation of the crank, I notice the noise when my rpms are medium to slow.
    There is still a continuous rotation with each rotation, with no interuption within the complete turn of the crank, but i am afraid that if this is not corrected it will lead to other problems. It is strange for when I had my original chain rings and bottom bracket i eventually came up with the similar problem i am having now. The shop said I had a worn inner chain ring which they repaced.
    The bike was smooth for awhile but after approximately 200 km I am started to hear this crank noise>
    All I can really think the problem is probably the bottom bracket again. I believe I may give up and buy a LHT Surly, T800 has a excellent frame but once the original components are replaced they are never the same.

    Eragon

  2. #2
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    So what sort of noise is it? is anything getting in the way of the crank once per rotation, say the front dereilleur cable?, is the replacement chain ring too wide and interfering with the Bottom Bracket? Have you tried asking the shop what they did, and if they can see any issues with the rebuild?

    For a bike not being the same after the orginal components are replaced, unless you are putting incompatible parts on, it you should not notice any drop in performance, most often it will feel better, just changing the frame won't help you,

  3. #3
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    Quote Originally Posted by jimc101 View Post
    So what sort of noise is it? is anything getting in the way of the crank once per rotation, say the front dereilleur cable?, is the replacement chain ring too wide and interfering with the Bottom Bracket? Have you tried asking the shop what they did, and if they can see any issues with the rebuild?

    For a bike not being the same after the orginal components are replaced, unless you are putting incompatible parts on, it you should not notice any drop in performance, most often it will feel better, just changing the frame won't help you,
    Thank you for your responce> No there is no obstruction, every component is compatible> the noise alone originates from the crank itself, one would assume it is the only movable part as the bottom bracket bearings within the cartilage, yes I agree as to what you are refering to such as performance should be better. Although I started off with myself in ajusting the chain from jumping, possibly a poor tune up and terrible service from the shop.

  4. #4
    Senior Member Doug64's Avatar
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    My wife's T800 (2007) has been a good bike. I did have to replace the Bottom bracket after about 6000 miles. It was a Shimano. Your's is a Truvativ, but they are both splined. The frame has very little or no relationship to how the components perform. Have the LBS remove the crank arms and spin the BB spindle by hand. You will feel it if there is a problem. Also check the torque on the bottom bracket, crank arm bolts,and chain rings.

    Cable tension on the rear derailleur is also sensitive on her bike. If not adjusted correctly it will "skip" gears.

    I have never encountered it before, but my wife's BB drive side cup backed out a couple of turns on a bike I built up for her 2 years ago. It was also making a rotational related noise. I am usually pretty careful about torque when putting a bike together, but I must have missed it on her new bike. I'm not sure why it decided to do that after 5000 miles, or how long it had been that way.

    I have a LHT, and can tell you that if it was stock it is no better than the T800. For the most part, the T800 had better components than the stock LHT does.

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