Derailleur Compatability ? w/Shimano ST-5700 Shifters
06-29-20, 10:18 AM
#1
Newbie
Thread Starter
Join Date: May 2016
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Derailleur Compatability ? w/Shimano ST-5700 Shifters
I'm an almost 73 year old regular road bike rider. My leg strength isn't quite what it once was, so I'm wanting to give myself some improved climbing capability by installing a larger rear cassette (assume 11-34t). My shifters, which are still in good shape are Shimano ST-5700 (10 speed). My present rear derailleur won't accommodate the assumed larger cassette, so I'm asking for recommendations for a new derailleur that will work with my new cassette and existing shifters. Thanks in advance to anyone who can help me out.
06-29-20, 10:51 AM
#2
Licensed Bike Geek
A very common way to achieve your goal is to install a Shimano 9-speed rear MTB derailleur, most any will do. The touring guys use this to get the gearing they need to carry their loads whoever they need to go. The MTB derailleur works perfectly with your shifters.
Its a simple install and setup, no tricks.
Its a simple install and setup, no tricks.
Last edited by Davet; 06-29-20 at 10:57 AM.
Likes For Davet:
06-29-20, 10:57 AM
#3
Blamester
Something like this may work.
I haven't used one but maybe someone here has.
https://www.sjscycles.co.uk/gear-spa...nger-extender/
I haven't used one but maybe someone here has.
https://www.sjscycles.co.uk/gear-spa...nger-extender/
06-29-20, 01:41 PM
#4
Expired Member
Join Date: Jun 2007
Location: TN
Posts: 11,538
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 3672 Post(s)
Liked 5,427 Times
in
2,757 Posts
I'll second the 9 speed mtb derailleur. Works perfectly, no kludge. This https://www.jensonusa.com/Shimano-De...ear-Derailleur is as low as I'd go on the food chain, you might find better on ebay. Just remember 9 speed, the 10 speed won't work with your road group.
06-29-20, 01:42 PM
#5
Senior Member
Join Date: Jan 2009
Location: San Diego, CA
Posts: 3,671
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 836 Post(s)
Liked 1,061 Times
in
745 Posts
Just wanted to check if you have tried the new cassette with your current derailleur as sometimes if you have the longer cage length version it may handle a 34t cog even though it's only rated for 32t.
06-29-20, 03:31 PM
#6
Newbie
Thread Starter
Join Date: May 2016
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Thanks to everyone for the quick responses. To the person who suggested trying to squeeze a little extra out of my existing derailleur, it’s a short cage so pretty sure that won’t fly. The MTB derailleur option sounds like the way I’ll go though the extender sounds intriguing. Might try that first.
06-30-20, 06:13 PM
#7
Senior Member
Join Date: Jun 2002
Location: San Jose, CA
Posts: 3,691
Bikes: Too many bikes, too little time to ride
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 430 Post(s)
Liked 460 Times
in
318 Posts
I would try the current RD first with the new cassette just to be sure. Many have pushed those short cage RDs beyond the on-paper limits.
07-01-20, 08:44 AM
#8
Newbie
Thread Starter
Join Date: May 2016
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
To Crankycrank...I just looked more carefully at my response to your suggestion. It seems a bit dismissive on my part. Sorry...didn’t mean for it to sound the way it did. I will give it a try since it’s certainly the easiest way to go. Thanks.
