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 Post subject: V-Rex issue with chain/ derailieur
 Post Posted: Tue Oct 15, 2013 4:38 pm 
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Joined: Tue Oct 15, 2013 3:22 pm
Posts: 1
When on my small chainring the chain rubs on the bottom of the derailieur. The chain was replaced by a local shop that isn't familiar with recumbents. I measured it to be 122 inches 125 ins is recommended. Any thoughts on what to do?

Also I just replaced both idlers. After 12 miles the front idler was severely worn with deep grooves. I found the pin the idler sits on was angled up and corrected this. Could have this been the source of the worn idler? Thanks, Barry


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 Post subject: Re: V-Rex issue with chain/ derailieur
 Post Posted: Wed Oct 16, 2013 5:42 pm 
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Joined: Mon Feb 21, 2011 12:38 pm
Posts: 177
Location: Maryville, IL
What are the sizes of your chainrings on the front crankset? What size is the smallest and largest cog on the cassette? What model of derailleur is on it. If you posted a photo of the drivetrain that would really help.

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John W. (RANS Zenetik 26, Catrike Road, Barcroft Columbia)
Maryville, IL


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 Post subject: Re: V-Rex issue with chain/ derailieur
 Post Posted: Fri Nov 01, 2013 2:12 pm 
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Joined: Thu Feb 24, 2011 9:47 pm
Posts: 28
Location: Lansing, Michigan
It sure sounds like something is set up incorrectly, perhaps the chain is mis-routed? My '97 V-Rex uses a 30-44-56 chainring set and the original idlers are still in good shape after 15000+ miles. With a properly-routed chain, there's very little stress on the idlers. The one under the seat is simply to prevent chain sag and slap along the long power run, and the one in front is just to lift the lightly-tensioned return side over the fork.


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 Post subject: Re: V-Rex issue with chain/ derailieur
 Post Posted: Fri Nov 01, 2013 2:59 pm 
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Joined: Mon Feb 21, 2011 12:38 pm
Posts: 177
Location: Maryville, IL
BlazingPedals,

He got it corrected. Someone had set it up with the wrong idler in the front and had the chain setup as a crossover like a Bacchetta. He ordered the correct idler from RANS and installed it and does not have any derailleur rub.

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John W. (RANS Zenetik 26, Catrike Road, Barcroft Columbia)
Maryville, IL


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