Replacing Crankset
#1
Full Member
Thread Starter
Join Date: May 2012
Location: Atlanta, GA
Posts: 335
Bikes: Dave Kirk Custom, Clockwork Bikes Custom, Batavus Course Specialized HardRock x2 Trek 700 MultiTrack 1991 Trek 950 SingleTrack. Miyata Three Ten
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Replacing Crankset
HI,
I'm looking to replace a 28/38/48 crankset with a 22/32/42. My front derailleur is top mounted, clamped to the seatpost, bottom swing, top pull. Since the tooth differential between the smallest and largest chainwheel is the same, could I assume that the FD would still work, but that I would need to unclamp it and slide it down (and possibly install a longer cable)? I'm sticking with the same brand (Altus). The current one is approx 1993 year model.
Thanks,
Jon
I'm looking to replace a 28/38/48 crankset with a 22/32/42. My front derailleur is top mounted, clamped to the seatpost, bottom swing, top pull. Since the tooth differential between the smallest and largest chainwheel is the same, could I assume that the FD would still work, but that I would need to unclamp it and slide it down (and possibly install a longer cable)? I'm sticking with the same brand (Altus). The current one is approx 1993 year model.
Thanks,
Jon
#2
Senior Member
Join Date: Nov 2011
Location: Rochester, NY
Posts: 1,342
Bikes: 1962 Carlton Franco-Suisse Custom,1968 Raleigh DL-1/Tourist, 1971 Holdsworth Professional, 1973 Holdsworth Mistral,1973 Raleigh Gran Sport,1974 Raleigh Grand Prix, 1993 Trek 2200 Composite, 2011 Trek 7.3FX
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 67 Post(s)
Likes: 0
Liked 6 Times
in
6 Posts
yes, outside of installing a new cable you should be fine, be prepared to readjust the fd though
#3
Full Member
Thread Starter
Join Date: May 2012
Location: Atlanta, GA
Posts: 335
Bikes: Dave Kirk Custom, Clockwork Bikes Custom, Batavus Course Specialized HardRock x2 Trek 700 MultiTrack 1991 Trek 950 SingleTrack. Miyata Three Ten
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 32 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Oh, and maybe take a link or two out of the chain?
#4
Really Old Senior Member
The FDER cages for the smaller ringed cranksets have a smaller radius, but your FDER should still work OK.
It just might not shift quite as well as before.
It just might not shift quite as well as before.
#5
Senior Member
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,319
Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta
Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1438 Post(s)
Liked 1,092 Times
in
723 Posts
Yes, but don't just remove some links. Size the chain per the usual methods and gently shift into the big-big combo on the bench to ensure that the chain is long enough before riding the bike. I like this method: https://sheldonbrown.com/derailer-adjustment.html#chain
Thread
Thread Starter
Forum
Replies
Last Post
sjfoote081
Bicycle Mechanics
12
02-15-18 05:02 PM
scotty03
Bicycle Mechanics
15
09-02-12 10:15 PM
Telly
Bicycle Mechanics
8
04-01-12 09:07 AM