Problem tuning Specialized sport SRAM 3.0 both front and back

[Theakson]

I have a Specialized sport with SRAM 3.0 gears. Right now I have gear shifting issues as follows. If
you rotate the pedals backwards the chain leaps out of the largest front cog. Secondly the chain
periodically jumps up on the rear cog generally the largest by this I mean that it remains on the
largest cog BUT it's as if the top part of the chain is stopped and the bottom keeps going thus
causing two of the links to form an "A" at the top of the rear cog. I hope that this is a good
description as I know little about transmissions. The rear wheel seems to be aligned properly and is
true. The only other issue is on the GRIPSHIFT where for the second gear I have to shift a little
past 2 in order to get it into that gear.

TIA

 

[Bomba]

theakson wrote:
> I have a Specialized sport with SRAM 3.0 gears. Right now I have gear shifting issues as follows.
> If you rotate the pedals backwards the chain leaps out of the largest front cog.

Maybe you haven't worked this out yet, but the bike works better if you pedal forwards

Seriously, pedalling backwards isn't a good idea for exactly the reasons you describe.

Secondly the chain periodically jumps up
> on the rear cog generally the largest by this I mean that it remains on the largest cog BUT it's
> as if the top part of the chain is stopped and the bottom keeps going thus causing two of the
> links to form an "A" at the top of the rear cog. I hope that this is a good description as I know
> little about transmissions.

Possibly a stiff link in the chain. The next time it does this, check the 'A' to see if the link
is having trouble bending at that point, or if it's twisted. If it's stiff, bend the link back
and forth and from side to side to loosen it. If it's twisted, twist it back with a couple of
pairs of pliers.

The rear wheel seems to be aligned properly and is
> true. The only other issue is on the GRIPSHIFT where for the second gear I have to shift a little
> past 2 in order to get it into that gear.

It's a good idea to learn how to adjust your gears:
http://www.sheldonbrown.com/derailer-adjustment.html

 

[Theakson]

thanks bomba the weblink helped out alot and I now am peddling forwards

"bomba" <[email protected]> wrote in message news:[email protected]...
> theakson wrote:
> > I have a Specialized sport with SRAM 3.0 gears. Right now I have gear shifting issues as
> > follows. If you rotate the pedals backwards the chain leaps out of the largest front cog.
>
> Maybe you haven't worked this out yet, but the bike works better if you pedal forwards
>
> Seriously, pedalling backwards isn't a good idea for exactly the reasons you describe.
>
> Secondly the chain periodically jumps up
> > on the rear cog generally the largest by this I mean that it remains on
the
> > largest cog BUT it's as if the top part of the chain is stopped and the bottom keeps going thus
> > causing two of the links to form an "A" at the
top
> > of the rear cog. I hope that this is a good description as I know little about transmissions.
>
> Possibly a stiff link in the chain. The next time it does this, check the 'A' to see if the link
> is having trouble bending at that point, or if it's twisted. If it's stiff, bend the link back
> and forth and from side to side to loosen it. If it's twisted, twist it back with a couple of
> pairs of pliers.
>
> The rear wheel seems to be aligned properly and is
> > true. The only other issue is on the GRIPSHIFT where for the second gear
I
> > have to shift a little past 2 in order to get it into that gear.
>
> It's a good idea to learn how to adjust your gears:
> http://www.sheldonbrown.com/derailer-adjustment.html