Double crankset w/ triple shifter & derailleur
#1
Senior Member
Thread Starter
Join Date: Jun 2007
Location: Coral Springs, FL
Posts: 197
Bikes: Specialized Allez (2007); Fuji Finest (2002); Trek 1100 (1994); Giant Iguana
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Double crankset w/ triple shifter & derailleur
Trying to get my bike which is set up with Shimano Sora triple working with a double crankset that I put on. I've so far done a lot to try and keep it shifting right but I haven't had much luck. What do I need to change to fix this: The derailleur? The brifter? Both?
Thanks.
Thanks.
#2
Newbie
Join Date: Aug 2007
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
how is it currently shifting? will it not reach one of the rings, or does it do so inconsistently? or is it dropping the chain off in a particular direction? two options, one dirty and the other standard. the dirty: set the limit screws of the derailleur so that the brifter can't index to the non-existent third ring. the standard: check your spindle length- you might be able to change the range the brifter has to cover and thereby improve the shifting.
#3
Senior Member
Thread Starter
Join Date: Jun 2007
Location: Coral Springs, FL
Posts: 197
Bikes: Specialized Allez (2007); Fuji Finest (2002); Trek 1100 (1994); Giant Iguana
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
It drops off one the big ring and there is chain rub on some of the gears.
#4
Senior Member
Join Date: Feb 2005
Location: Oklahoma
Posts: 9,438
Bikes: Trek 5500, Colnago C-50
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 7 Times
in
6 Posts
It should work well but better if you replace the front derailleur with a double FD. Use the setup instructions found at: https://www.parktool.com.
Al
Al
#5
Senior Member
Join Date: Jan 2008
Location: Scotland
Posts: 162
Bikes: Dawes road bike and Trek Antelope 850
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
The triple shifter shouldn't be a problem. I use Shimano 105 shifters which can handle a triple, they don't even make a double version.
I set mine so it uses the tightest two positions. That way I can't overstrain it.
Your limit screw may be set wrong if the chain throws off. The Park Tool site goes through the whole process of setting it up. Note that the indexing is the last adjustment after you've got the mech properly aligned and the limit screws all set up.
https://www.parktool.com/repair/printhowto.asp?id=75
I set mine so it uses the tightest two positions. That way I can't overstrain it.
Your limit screw may be set wrong if the chain throws off. The Park Tool site goes through the whole process of setting it up. Note that the indexing is the last adjustment after you've got the mech properly aligned and the limit screws all set up.
https://www.parktool.com/repair/printhowto.asp?id=75