I have autoshifting on my raleigh w/ suntour braze on levers. Like someone said before, it can sometimes be attributed to the bolt on the lever not being tight enough. Sometimes the threads either on the frame or on the bolt itself are stripped. In this case, easy solution -- get some loctite and apply liberally on the bolt threads and inside the bolt hole, screw it in as tight as you can, and let it sit for about 24 hours. And it should work ok after that. Oh, and screw it in as tight as possible before you loctite it and test the bike to see if that's really the problem. Getting out loctite isn't fun. :-)
Matt Yee Honolulu, HI
>> -----Original Message-----
>> From: classicrendezvous-bounces@bikelist.org
[mailto:classicrendezvous-
>> bounces@bikelist.org] On Behalf Of Dan Kasha
>> Sent: Friday, May 30, 2003 1:43 AM
>> To: classicrendezvous@bikelist.org
>> Subject: [CR]Re: Autoshifting DT levers
>>
>> I am going to highly question what Chuck states here (sorry
>> Chuck).
>>
>> >DT levers slipping is also a component of how stiff your frame is
>> >laterally. Flexy frame = autoshifting.
>> >Chuck Schmidt
>> >L.A.
>>
>>
>> As an example, I recently put NR shift levers and rear derailleur on
>> my cannondale and the auto shift is the worst I have yet experienced,
>> but due to the friction of the dt shifter, and not the frame flex.
How
>> do I know? Well first off, it is not a particularly flexy bike.
>> Secondly,
>> I also ran the same derailleur (and even cable) with a shimano 105
>> non/indexed shifter and there was absolutely no autoshifting ever,
period.
>> (by the way, those 105's are amazing little cheap levers). If it was
>> frame flex, and not shifter slip, then why would it change when I
change
>> shift levers?
>>
>> What I do think causes the autoshift is the return portion of the
chain
>> oscillating left and right as you climb and rock the bike. There is
a
>> decent amount of weight of chain that is not under much tension down
>> there. When you rock the bike left and right while climbing, that
chain
>> puts lateral force on the derailleur's cage and if you don't have
enough
>> friction in your levers, you are going to get autoshift.
>>
>> Give it some thought. Do some experiments. I think you too will
>> decide that the frame flex thing is at least partially (though I
claim
>> fully)
>> a myth.
>>
>> Dan Kasha
>> Providence, RI, but moving to
>> Salt Lake City, UT in 20 days!