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Main
Date: 12 Apr 2007 05:59:52
From: Steve
Subject: false shifting when I'm on the trainer
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I have a question for the more mechanically-inclined readers.
I'm having an issue when I hook up the new bike to my trainer. Not
long after I begin pedaling, I'm experiencing some sporadic false
shifting, meaning it both sounds and feels like I'm shifting, but the
gear doesn't actually shift.
With my pea-like brain, I'm assuming this is the result of either one
of two things. First, because the frame is a lot less stiff than the
aluminum frame I was riding, perhaps my weight is causing the frame to
flex once I set the rear skewer in the trainer and that, in turn, is
creating tension on the rear derailleur cable where it sits in the
cable guide under the crank housing.
Any thoughts on that one?
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Date: 13 Apr 2007 08:36:10
From: Steve
Subject: Re: false shifting when I'm on the trainer
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On Apr 12, 12:15 pm, "nash" <zwepytzkehil...@jetable.net > wrote:
> "Steve" <okaywonder...@gmail.com> wrote in message
>
> news:1176382792.651579.43350@n59g2000hsh.googlegroups.com...
>
> >I have a question for the more mechanically-inclined readers.
>
> > I'm having an issue when I hook up the new bike to my trainer. Not
> > long after I begin pedaling, I'm experiencing some sporadic false
> > shifting, meaning it both sounds and feels like I'm shifting, but the
> > gear doesn't actually shift.
>
> > With my pea-like brain, I'm assuming this is the result of either one
> > of two things. First, because the frame is a lot less stiff than the
> > aluminum frame I was riding, perhaps my weight is causing the frame to
> > flex once I set the rear skewer in the trainer and that, in turn, is
> > creating tension on the rear derailleur cable where it sits in the
> > cable guide under the crank housing.
>
> > Any thoughts on that one?
>
> Which gear and is it when going down or up?
> The adjustable screws or wire tension has got to be part of the answer.
> If not low enough or high enough gear it is just the screws.
I'm not shifting when it happens--it just happens sporadically. In
terms of the gearing, it's a 10-speed and the chain is sitting on one
of the middle cogs in the cassette. When I ride on the road it
doesn't happen--shifts beautifully.
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Date: 13 Apr 2007 15:54:06
From: nash
Subject: Re: false shifting when I'm on the trainer
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"Steve" <okaywonderful@gmail.com > wrote in message
news:1176478570.680984.87610@w1g2000hsg.googlegroups.com...
> On Apr 12, 12:15 pm, "nash" <zwepytzkehil...@jetable.net> wrote:
>> "Steve" <okaywonder...@gmail.com> wrote in message
>>
>> news:1176382792.651579.43350@n59g2000hsh.googlegroups.com...
>>
>> >I have a question for the more mechanically-inclined readers.
>>
>> > I'm having an issue when I hook up the new bike to my trainer. Not
>> > long after I begin pedaling, I'm experiencing some sporadic false
>> > shifting, meaning it both sounds and feels like I'm shifting, but the
>> > gear doesn't actually shift.
>>
>> > With my pea-like brain, I'm assuming this is the result of either one
>> > of two things. First, because the frame is a lot less stiff than the
>> > aluminum frame I was riding, perhaps my weight is causing the frame to
>> > flex once I set the rear skewer in the trainer and that, in turn, is
>> > creating tension on the rear derailleur cable where it sits in the
>> > cable guide under the crank housing.
>>
>> > Any thoughts on that one?
>>
>> Which gear and is it when going down or up?
>> The adjustable screws or wire tension has got to be part of the answer.
>> If not low enough or high enough gear it is just the screws.
>
> I'm not shifting when it happens--it just happens sporadically. In
> terms of the gearing, it's a 10-speed and the chain is sitting on one
> of the middle cogs in the cassette. When I ride on the road it
> doesn't happen--shifts beautifully.
I would try loosening the screw for the wire tension down by the derailleur
since that is what you say is causing the tension. If that is not enough
lengthen the wire at the adjustment where the wire is fastened.
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Date: 12 Apr 2007 16:15:35
From: nash
Subject: Re: false shifting when I'm on the trainer
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"Steve" <okaywonderful@gmail.com > wrote in message
news:1176382792.651579.43350@n59g2000hsh.googlegroups.com...
>I have a question for the more mechanically-inclined readers.
>
> I'm having an issue when I hook up the new bike to my trainer. Not
> long after I begin pedaling, I'm experiencing some sporadic false
> shifting, meaning it both sounds and feels like I'm shifting, but the
> gear doesn't actually shift.
>
> With my pea-like brain, I'm assuming this is the result of either one
> of two things. First, because the frame is a lot less stiff than the
> aluminum frame I was riding, perhaps my weight is causing the frame to
> flex once I set the rear skewer in the trainer and that, in turn, is
> creating tension on the rear derailleur cable where it sits in the
> cable guide under the crank housing.
>
> Any thoughts on that one?
Which gear and is it when going down or up?
The adjustable screws or wire tension has got to be part of the answer.
If not low enough or high enough gear it is just the screws.
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