Aluminum bike Chainstays block the chain please help

[chained]

I have a 29" Genesis GS29 MTB. The bike is aluminum. The chainstays curve in towards the center by design, and they are both getting hit by the chain and prevents it from lining up correctly. I have it now where the chain stays on by bending the tensioner, but it is digging into the frame on both the upper and lower chainstay.

Is it possible to bend them out a little bit to clear the chain?

Im afraid that the chain will eventually grind through the frame tubes and cause even more problems. Everything i working great besides this issue. I would like to keep the bike since its larger and a better ride than a 26" bike.


Thank you

 

[dougsr.874]

Is it possible???? NO...classic example of motorizing the wrong bike....

 

[Timbone]

The chain WILL eat through your frame. You must adapt in order to make it work.

If the frame were steel, yes you could bend it as needed to make a little room for the chainline. But aluminum is more brittle and bending it will lead to premature failure.

Get some spacers of different widths and start playing around. Maybe you can make it work.

 

[wheelbender6]

The chain tensioner can be used to direct the chain so the the stays don't interfere with it.
You may even need to run two chain tensioners to avoid chain interference.
In the pic below, the tensioner directs the chain away from the stay.

 

[Robot]

Here is a pic of one cut to fit chain

cut to fit in background but this engine is tack welded to the frame should it be found to help tack only one side of the engine case please..etc etc.

 

[chained]

The chainstay and seatstay both curve in, so no matter how I put the tensioner, it still rubs.
I notice on the bike above, the rear sprocket is dish side in. Mine is dish side out, but I doubt it would make that much difference.

Im just gonna try to pick up a used bike locally. If it werent for these tubes interfering with the chain, it would be great. The bike is sturdy and I like the larger size.

Thanks for the help everyone.

 

[Timbone]

I wouldn't give up so easily. I had the same problem on my first build. Flip the sprocket to run the chain closer to the spokes. That will make a difference. Then add a spacer or spacers to the left side to push the rear triangle outwards. 3/4"movement may solve your problem.

 

[chained]

I wouldn't give up so easily. I had the same problem on my first build. Flip the sprocket to run the chain closer to the spokes. That will make a difference. Then add a spacer or spacers to the left side to push the rear triangle outwards. 3/4"movement may solve your problem.

I dont want to give up at all. i love this bike. I was going to flip the sprocket around to see how much more space it gives.

But I am not understanding what you mean by spacers. 3/4" is really all I need, its that close.

Could you elaborate a little bit on the spacers suggestion? Thanks

 

[chained]

Im thinking that you mean to put spacers on the hub? If so, thats a good thing to try.

Sorry, Im new to all this. I apologize for my newbness.

 

[chained]

Took some pictures, not sure if they give enough reference.