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Old 01-29-07, 08:26 PM   #1
Jerry7
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Shifting problem

I picked up my new Kona Dawg Deluxe 22" last Wed night. It was raining so I put it on my workstand at home just to run it through the gears. Good thing I did because everytime I put it in the middle chainring and shifted to the 2 largest cogs, the chain dropped to the small ring. (Why this was not caught before they gave me the bike, I don't know. But that is a different issue.)
After trying to adjust the front derailleur to stop the problem with no luck, I saw that it was dropping the chain at the same spot each time but the middle ring teeth looked fine. So Saturday AM I took it back to the dealer (which is 1 hour away) and let them look at it. They could not fix it either and also saw it dropping at the same spot that I marked on the chainring but agreed the ring looked fine. They suggested I take it home and ride it a little bit this week and bring it back this Friday.
In the meantime, does anyone have any ideas/suggestions on what the problem is. Maybe I could pass it on to the bike shop on Friday when I take it back.
As you can guess, I'm getting somewhat frustrated with my experience so far.
Thanks
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Old 01-29-07, 08:48 PM   #2
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Hard to diagnose without observing the malfunction, but it sounds like a chainline or frame alignment issue.
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Old 01-29-07, 08:53 PM   #3
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Quote:
Originally Posted by Jerry7
I picked up my new Kona Dawg Deluxe 22" last Wed night. It was raining so I put it on my workstand at home just to run it through the gears. Good thing I did because everytime I put it in the middle chainring and shifted to the 2 largest cogs, the chain dropped to the small ring. (Why this was not caught before they gave me the bike, I don't know. But that is a different issue.)
After trying to adjust the front derailleur to stop the problem with no luck, I saw that it was dropping the chain at the same spot each time but the middle ring teeth looked fine. So Saturday AM I took it back to the dealer (which is 1 hour away) and let them look at it. They could not fix it either and also saw it dropping at the same spot that I marked on the chainring but agreed the ring looked fine. They suggested I take it home and ride it a little bit this week and bring it back this Friday.
In the meantime, does anyone have any ideas/suggestions on what the problem is. Maybe I could pass it on to the bike shop on Friday when I take it back.
As you can guess, I'm getting somewhat frustrated with my experience so far.
Thanks
well actually , you're technically not supposed to be in middle ring with inner 2 cogs.

Last edited by Big_knob; 01-29-07 at 08:58 PM.
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Old 01-29-07, 09:43 PM   #4
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If it only happens on the 2 biggest cogs, can you live with never using that combination? I could, probably. If that's the only issue with the bike's shifting.
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Old 01-30-07, 08:11 AM   #5
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I thought cross gearing was only when in the big front and big rear cogs or small/small. I have never seen where it was an issue when in the middle ring. I don't have any issues doing this with my Trek 4500, although it's only a 8 speed cog set.

I think it would be hard to live without those 2 cogs because I'm in the middle ring most of the time. I don't always know exactly what gear I'm in, so, I can see myself downshifting as I go up a hill and then I hit those 2 cogs and suddenly the chain slips to the small ring. This could be a little dangerous.
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Old 01-30-07, 08:21 AM   #6
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That bike should shift into any gear you put it in even if it cross chains or not.Did you try and turn the low limit screw counterclock wise a little at a time. Good luck with the new bike.I bought 5 bikes and all but one shifted the way it was suppose too.
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Old 01-30-07, 08:35 AM   #7
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George, just to clarify.
It will shift to that combination but the chain drops to the small ring. Sometimes immediatly, sometimes after a few pedal revolutions. I could see where some minor chain rub could occur, but I dont think it should cause the chain to drop to the small ring.
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Old 01-30-07, 08:36 AM   #8
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If there really is nothing else wrong, then it sounds like a chainline problem to me. If it's possible to do so, a bottom bracket with a shorter spindle might solve it................I agree that the bike should be capable of shifting to all gear combinations, but of course that's not to say that you should actually use all of them. With a triple crank, my general rule of thumb is to use the outermost half of the cassette with the big ring, all but the extreme innermost and outermost cogs with the middle ring (meaning innermost and outermost one or two cogs), and the innermost half of the cassette with the small ring-
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Old 01-30-07, 08:40 AM   #9
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Sounds like chainline problem. Does it look like you could install a narrower bottom bracket?
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Old 01-30-07, 08:50 AM   #10
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I would agree that this is not a combination I would use alot. But, as I mentioned earlier, I ride in the middle ring most of the time. I don't won't to lose track of which gear I'm in as I am struggling to get up a hill and have the chain slip.
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Old 01-30-07, 08:57 AM   #11
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Quote:
Originally Posted by GeoKrpan
Sounds like chainline problem. Does it look like you could install a narrower bottom bracket?

The mechanic at the LBS did mention something about removing a spacer ( I guess in the bottom bracket) but he made it sound like this was a last resort option.

It is a Race Face Ride X type BB and cranks, if this helps.
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Old 01-30-07, 11:42 AM   #12
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Maybe the front derailler is set just a little too far inward, the combination of that and the sideways pull of the chain on the inner most gears is enough that when the chain ring reaches the shift gates on the chain ring, it shifts. Try a little more front derailler cable tension. Quick, simple, free.
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