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new 105 triple phantom shifts, any solutions?(5 posts)

new 105 triple phantom shifts, any solutions?spin
Jun 13, 2001 6:33 PM
i recently bought a klein quantum w/105 triple. while climbing, i am getting phantom shifts in the tall gears, regardless of which front chainring i am in. is this part of the breaking in process, poor tuning, poor design, frame flex, what? any feedback would be greatly appreciated.

by the way, i can't imagine a more comfortable ride than the klein. i am sure there are better rides out there, but this puts the steel vs. alum. argument to rest for me.
Get it tunedBayou Boy
Jun 13, 2001 7:21 PM
I have this same bike with the double. I also work at a shop that sells them. Bring it back for your 90 day tuneup. The cables stretch and make it shit like trash. This happens on all bikes. Either this or it wasn't set up right in the 1st place.
re: new 105 triple phantom shifts, any solutions?shmoo
Jun 13, 2001 8:12 PM
From your post I'm assuming that this is a fairly new bike and drivetrain. If so, it sounds like the rear dr just a little out of adjustment, or there could be something wrong with the chain as in a bad roller or link. It shouldn't be part of the break in. A properly set up new system should work flawlessly, although cable stretch might account for it. Phantom shifts happen a lot when the chain and/or cassette are worn, say after 3000mi or more. Ya might try playing your barrel adjusters (one on the dt and one at the dr). Just remember which way and how much you turn them, so you can return it to the original position if you have to. Experiment back an forth. Otherwise take it to the shop you bought it from and ask them to re-adjust the system. They should do it with a smile.
Check the chain >>>>>>Live Steam
Jun 14, 2001 6:36 AM
It could have a stiff link that will cause this when more pressure is exerted on the chain - ie. climbing. Or, as has been stated, the cables could have settled in and you need a fine tuning.
re: new 105 triple phantom shifts, any solutions?Mel Erickson
Jun 14, 2001 7:59 AM
I'm assuming it shifts by itself to a smaller cog in the back. Could be several causes but the cure should be easy (again assuming everything is lined up and not damaged). Either your max travel screw on the rear derailleur doesn't allow the derailleur to move far enough inward or it needs some tweaking with the adjustment barrel(s) or both. Just had a similar problem on my mountain bike. I adjusted the max travel screw to allow the derailleur to move a slight amount more to the inside (watch to make sure you don't move this too much. Your derailleur could hit the spokes or your chain could overshift and get jammed between the large cog and spokes.) I also adjusted the barrel adjuster to move the derailleur a slight amount inward when in the biggest cog. Make your adjustments small( 1/4 turn of a screw or one click on the adjustment barrel) and remember how much you moved them in which direction. It's a good thing to know how to make these minor adjustments. You may be out on the road and need to, there's no mechanic to help you there. If you don't feel comfortable doing this yourself take it into the shop and ask them if you can watch and if they'll explain the process to you. I'm sure they'll be happy to do this. You learn and get a smooth running drivetrain to boot.