Is ST-4500 Tiagra SIS Shifter Compatible with RD-T661 LX RD?
06-18-22, 02:29 PM
#1
Full Member
Thread Starter
Join Date: Mar 2018
Location: Los Angeles
Posts: 463
Bikes: 02 Litespeed Ultimate, 84 & 85 Raleigh Grand Prix, '84 Raleigh Prestige, 85 Raleigh 555 RSL, '20 Raleigh Tamland, 38 Raleigh, 85 Landshark "Raleigh", '84 Marinoni Levi's Raleigh, SB4484, SB7979, Raleigh SSCXWC, 87 Raleigh USA 531 Prototype
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 202 Post(s)
Liked 147 Times
in
79 Posts
Is ST-4500 Tiagra SIS Shifter Compatible with RD-T661 LX RD?
Okay, I am guessing that the LX RD must be set up for a different pull (flat bar only?) than the Tiagra 9-Speed drop bar Shifter, can anyone confirm? The downshift is perfect until you hit gears 3-2-1, then all goes to hell. Thanks!
06-18-22, 05:00 PM
#2
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,831
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: 1951 Post(s)
Liked 2,189 Times
in
1,333 Posts
Tiagra 4500 9 speed shifters should be compatible with LX-RD661 9 speed rear derailleur.
9 speed road and mtb RD/shifters, except Sora 3000, are compatible.
Not sure why it doesn’t work.
John
Edit added: Are you running new cables and housings?
9 speed road and mtb RD/shifters, except Sora 3000, are compatible.
Not sure why it doesn’t work.
John
Edit added: Are you running new cables and housings?
Last edited by 70sSanO; 06-18-22 at 05:14 PM.
Likes For 70sSanO:
06-18-22, 05:13 PM
#3
Mother Nature's Son
Join Date: Mar 2016
Location: Sussex County, Delaware
Posts: 3,123
Bikes: 2014 Orbea Avant MD30, 2004 Airborne Zeppelin TI, 2003 Lemond Poprad, 2001 Lemond Tourmalet, 2014? Soma Smoothie
Mentioned: 15 Post(s)
Tagged: 0 Thread(s)
Quoted: 854 Post(s)
Liked 1,447 Times
in
824 Posts
I believe all Shimano 9 speed groups are compatible. When you state 3-2-1, do you mean going to smaller cog, or going to larger cog. I am using a Deore rear derailleur, rd-m591, with 4500 9 speed shifters, and it shifts flawlessly. Are you sure the cable was installed correctly? The derailleur needs to be shifted into the 9 gear, for the smallest cog. when installing the new cable. If it is not, there will not be enough travel to cover all the cogs. Also, once the cable is installed, before using the barrel adjuster, make sure the limit screws are set so that the dr cage is centered on that small cog. Then use the barrel adjuster to fine tune.
Last edited by delbiker1; 06-18-22 at 05:22 PM.
06-18-22, 05:24 PM
#4
Full Member
Thread Starter
Join Date: Mar 2018
Location: Los Angeles
Posts: 463
Bikes: 02 Litespeed Ultimate, 84 & 85 Raleigh Grand Prix, '84 Raleigh Prestige, 85 Raleigh 555 RSL, '20 Raleigh Tamland, 38 Raleigh, 85 Landshark "Raleigh", '84 Marinoni Levi's Raleigh, SB4484, SB7979, Raleigh SSCXWC, 87 Raleigh USA 531 Prototype
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 202 Post(s)
Liked 147 Times
in
79 Posts
Oh yeah, It's all good, I work at a bike shop, but this one is a weird one. It's the Low, 2nd, and 3rd only, once you shift down from 4th to 3rd, it hits the low side of the gear and wants to grab the ramps of 2nd... If it was an upshift, I could see the spring being weak, but on the downshift, it's a head scratcher... Thanks.
06-18-22, 05:31 PM
#5
Senior Member
Join Date: Feb 2015
Location: Mission Viejo
Posts: 5,831
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: 1951 Post(s)
Liked 2,189 Times
in
1,333 Posts
Beyond the RD and shifters, there could be a hanger that is not straight.
John
John
06-18-22, 05:41 PM
#6
Full Member
Thread Starter
Join Date: Mar 2018
Location: Los Angeles
Posts: 463
Bikes: 02 Litespeed Ultimate, 84 & 85 Raleigh Grand Prix, '84 Raleigh Prestige, 85 Raleigh 555 RSL, '20 Raleigh Tamland, 38 Raleigh, 85 Landshark "Raleigh", '84 Marinoni Levi's Raleigh, SB4484, SB7979, Raleigh SSCXWC, 87 Raleigh USA 531 Prototype
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 202 Post(s)
Liked 147 Times
in
79 Posts
I just swapped with a new Sora RD and all is good! Thanks everyone for the help.
Likes For La Brea Bike:
