RD needs frequent readjustment
#1
Full Member
Thread Starter
RD needs frequent readjustment
So this is a new one on me... I have a newish Giant Roam 1 that probably has a bit over 1000km on it by now. Every few rides I need to adjust the collar at the shifter a few clicks to get the shifting back on track. I've run out of adjustment room twice and had to adjust the cable at the RD to give me back some adjustment room. I'm about to do this for the 3rd time now.
Here's the new to me part, I'm running out adjustment on the tight end, as if the shifter cable keeps getting shorter. When I adjust the cable at the RD I let out ~4-5mm of slack. I've went through it a bunch of times. Everything seems properly seated and tight. It's not a huge deal but I'm baffled as to what might be going on. Any ideas?
Here's the new to me part, I'm running out adjustment on the tight end, as if the shifter cable keeps getting shorter. When I adjust the cable at the RD I let out ~4-5mm of slack. I've went through it a bunch of times. Everything seems properly seated and tight. It's not a huge deal but I'm baffled as to what might be going on. Any ideas?
#2
Senior Member
So this is a new one on me... I have a newish Giant Roam 1 that probably has a bit over 1000km on it by now. Every few rides I need to adjust the collar at the shifter a few clicks to get the shifting back on track. I've run out of adjustment room twice and had to adjust the cable at the RD to give me back some adjustment room. I'm about to do this for the 3rd time now.
Here's the new to me part, I'm running out adjustment on the tight end, as if the shifter cable keeps getting shorter. When I adjust the cable at the RD I let out ~4-5mm of slack. I've went through it a bunch of times. Everything seems properly seated and tight. It's not a huge deal but I'm baffled as to what might be going on. Any ideas?
Here's the new to me part, I'm running out adjustment on the tight end, as if the shifter cable keeps getting shorter. When I adjust the cable at the RD I let out ~4-5mm of slack. I've went through it a bunch of times. Everything seems properly seated and tight. It's not a huge deal but I'm baffled as to what might be going on. Any ideas?
I've never seen anything like that, but I'm unable to come with a better idea. Cable slipping is one thing, but it becoming shorter is really strange.
#3
Senior Member
Join Date: Jun 2015
Location: Down Under
Posts: 1,936
Bikes: A steel framed 26" off road tourer from a manufacturer who thinks they are cool. Giant Anthem. Trek 720 Multiroad pub bike. 10 kids bikes all under 20". Assorted waifs and unfinished projects.
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 1188 Post(s)
Liked 1,154 Times
in
640 Posts
Crappy Inner stretching? Crappy outer with the inner sawing through the liner on curves. Crappy outer with the inner going between the longitudinal wires on curves. Crappy ferrules allowing the longitudinal outer wires to slide down inside the end. All of the above?
For a start I'd replace both with quality. Mandrel drawn stainless inner. Reinforced outers. Like a Jagwire Pro or Elite kit.
For a start I'd replace both with quality. Mandrel drawn stainless inner. Reinforced outers. Like a Jagwire Pro or Elite kit.
#4
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
I would suggest checking for cable fraying, especially inside the shifter. Catching it before the head breaks off makes the repair MUCH easier.
#5
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,656
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 836 Post(s)
Liked 1,058 Times
in
742 Posts
+1. I would check this first and before you do any more riding. Make sure the shifter is in the smallest sprocket position when you check at the shifter. Also check to make sure the cable housing is fully seated at all the stop points (Fully inserted in the shifter body and housing stops along the frame).
#6
Full Member
Thread Starter
Thanks for the input everyone. Sorry I'm so late posting an update - life happens. I noticed one day when cleaning my bike when replacing the rear wheel that tightening the skewer changed the RD position. I'd been chasing a creaking for a while and played with the rear skewer tension and it wasn't very tight. Turned out cleaning and a light grease on the removable dropout fixed the creaking issue... and retightening the skewer fixed the weird shifting issue. Sorry to waste your time on a problem that I created in the first place.
#7
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,789
Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1938 Post(s)
Liked 2,159 Times
in
1,319 Posts
Never a waste of time, especially when it is something out of the ordinary that was solved.
John
John
Likes For 70sSanO: