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Discussion Starter · #1 ·
It been three two months now that I have been riding my ETSX-90. I love the ride but I am having some really huge problems with the drivetrain.
Three weeks ago I did an endo and noticed that I was getting some ghost shifting afterwards. Did some adjustements and things went better. An hour later I stopped to for a quick break and after starting again I managed to get 10 feet before the derailleur went into the wheel. The derailleur hanger was bent, the cage of the derailleur was toast. Looking at the chain it was about to go off the large cog on the cassette but not quite. The dreailleur cage was in the spokes, the chain was super tight. So tight that it was impossible to move anything or take the wheel off. I took it to my shop and they say that the derailleur hanger must have gotten hit and shifting onto the large cog put it into the wheel. Ok, new hanger, new derailleur.
Last week I did a 73k race and things were perfect. It shifted like butter, super. A couple of day ago, after a good washing and post race inspection,I went off on my weekly night ride with my club. A good 10k of riding with super fine shifting again. then it happenned. I climbed to the top of a hill in the middle gear in the front and the large cog in the back. No problems at all. Got to the top of the hill and we decide to turn left instead of right. I got off and turned the bike around, got back on and pedaled 10 feet before the derailleur got sucked into the spokes again. Same senario as last time. No hits, no branches.
Any ideason how this coul be happening??
 

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Drinkin' the 29er KoolAid
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Buzzrider said:
It been three two months now that I have been riding my ETSX-90. I love the ride but I am having some really huge problems with the drivetrain.
Three weeks ago I did an endo and noticed that I was getting some ghost shifting afterwards. Did some adjustements and things went better. An hour later I stopped to for a quick break and after starting again I managed to get 10 feet before the derailleur went into the wheel. The derailleur hanger was bent, the cage of the derailleur was toast. Looking at the chain it was about to go off the large cog on the cassette but not quite. The dreailleur cage was in the spokes, the chain was super tight. So tight that it was impossible to move anything or take the wheel off. I took it to my shop and they say that the derailleur hanger must have gotten hit and shifting onto the large cog put it into the wheel. Ok, new hanger, new derailleur.
Last week I did a 73k race and things were perfect. It shifted like butter, super. A couple of day ago, after a good washing and post race inspection,I went off on my weekly night ride with my club. A good 10k of riding with super fine shifting again. then it happenned. I climbed to the top of a hill in the middle gear in the front and the large cog in the back. No problems at all. Got to the top of the hill and we decide to turn left instead of right. I got off and turned the bike around, got back on and pedaled 10 feet before the derailleur got sucked into the spokes again. Same senario as last time. No hits, no branches.
Any ideason how this coul be happening??
I haven't found the ETSX to be particularly prone to these problems, but I did have a similar issue last year when I picked up a stick in the rear wheel which bent a spoke outwards enough to snag the derailleur. Assuming you had a new derailleur and hanger and it was all properly installed and aligned then the only other possible cause would be not properly setting the derailleur limit screws which could allow the cage to move too far past the largest cog and into the spokes. When I setup a rear derailleur I set the limit very conservatively so that there is absolutely no way the cage can even get close to overshooting the large cog. Was this the first ride after the replacements that you used this gear combo?

Karl
 
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Discussion Starter · #3 ·
Thats the odd thing. The limit screws were fine. I had just finished a very technical 73k race a few days before. The post race inspection showed everything to be perfect.
This is my first experience with dual shifters and rapidrise and two derailleurs in three weeks. The shop says I hit it because the derailleur has a mini scratch on it. The derailleur on my Specialized with normal gearing is totaly banged up but after 5 years still has the origional hanger. I am going to install a NSB hanger which should be stronger. But I still do not think the damage was a result of a hit.
 

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Etsx 50

I had the same problem when I was riding last memorial day weekend. I was ascending a 30 or 40 deg slope with some rocks roots. As it is a long ascent I gradually switched to the large cog on the rear, eventually to the granny gear. As I did this with my left lever, the chain went off the largest rear cog, snapped my rear der that I could not find the roller guide. The process damaged 2 of my spokes. I did blame this on the shimano components. Prior to that event I had been getting ghost shifting and the initial chain getting sucked. It was similar with my cannondale 600 disc before, luckily no damaged rear der and spokes with that. I got SRAM from internet, brought my ETSX to LBS, the mechanic very reliable did not mention of problematic hanger. I did fall early on as I was getting used to the bike. Now that I have X7 shifters, X0 rear der, 2 days that I had been at a techie trail no problems with switching gears so far, from the biggest gear in front to granny gear. Same thing with the rear. I will just have to bring the bike back to the LBS for some adjustments later.
 

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ups and downs
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There were a bunch of posts about a year ago where people were bending derailleur hangers like deranged serial killers, 4-5 in a row. So far I have had no problem (touch wood) and I've had an ETSX since Nov 2003. Maybe it was a batch made of softer aluminium or something since many of them happened while JRA (or just riding uphill).

One solution would be to buy an aftermarket hanger

http://www.derailleurhanger.com/rockymountain.htm
 
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