Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 04-26-12, 10:38 PM   #1
mojobot
Junior Member
Thread Starter
 
Join Date: Apr 2012
Bikes:
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Too much tension in rear derailer cable or shonky Brifter?

Hello all,

I am having problems with my Shimano RX 100 brifters. I recently alligned my rear derailer. I find that although shifting down gears is fine, as soon as I try to shift up a gear it skips all cogs and goes to the upper limit(smallest rear cog), set by the limit screw. Does anyone have any advice? I think it may be too much tension in the cable but am not sure.

Any help would be greatly appreciated thankyou.
mojobot is offline   Reply With Quote
Old 04-27-12, 06:12 AM   #2
reptilezs
Senior Member
 
Join Date: Sep 2004
Location: boston, ma
Bikes:
Posts: 2,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
shifter pawls not catching. hose it down with some spray lube
reptilezs is offline   Reply With Quote
Old 04-27-12, 08:48 AM   #3
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,984
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 373 Post(s)
Quote:
Originally Posted by reptilezs View Post
shifter pawls not catching. hose it down with some spray lube
+1
Dried grease, dirt or rust is binding the mechanism and the little springs aren't strong enough to overcome it. Though WD-40 inflames many on this forum, it or something like it is perfect for this job. .Spray it in and work the levers back and forth to loosen everything, then flush once more and let it dry
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 04-27-12, 05:03 PM   #4
mojobot
Junior Member
Thread Starter
 
Join Date: Apr 2012
Bikes:
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have flushed the mechanism a few times with wd 40. Will try again today. I have read that pulling apart the brifter is a no no. However if it come to it will changing the spring help? Or should I use a specialized lubricant be the first course of action. Is there a non - discontinued shimano brifter which I can replace the rx100 with?
mojobot is offline   Reply With Quote
Old 04-29-12, 04:27 AM   #5
mojobot
Junior Member
Thread Starter
 
Join Date: Apr 2012
Bikes:
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Ok i have talked to a few people and read a bunch. Flushing it didn't work because the ratchet tooth was broken. The most common cause is the gunking up of components from under use, rust and dirt. The best thing to do for anyone else who has this problem is to degrease(not with wd40) over a period of a day while moving the components from time to time. THen make sure you re lubricate as well or thing will start falling apart.

As for me I dont want to give up on the Rx 100 STI and components are no longer produced by shimano, so, if anyone has an old RX 100 or 105 7 speed right hand shifter please let me know and I will make you an offer. Many thanks to everyone who took the time to respond and have a read of the problem at hand.

Happy hunting.
mojobot is offline   Reply With Quote
Old 04-29-12, 08:53 AM   #6
Hendo252 
Senior Member
 
Join Date: Feb 2012
Location: SoCal
Bikes: 1983 Trek 620, 2010 Roubaix
Posts: 371
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by mojobot View Post

As for me I dont want to give up on the Rx 100 STI and components are no longer produced by shimano, so, if anyone has an old RX 100 or 105 7 speed right hand shifter please let me know and I will make you an offer. Many thanks to everyone who took the time to respond and have a read of the problem at hand.

Happy hunting.
Check out ebay seller "eeforme" -- he overhauls Shimano brifters. I bought a set of 3x7 RSX brifters from him earlier this year; they have been flawless. I recommend him highly.
http://stores.ebay.com/eeforme?_rdc=1

He may do repairs; I'm not sure. See his FB page "Shimano STI Shifter Repair"
http://www.facebook.com/pages/Shiman...r/137062087082


Dunno if he'll take your old brifters in trade or not.

Hope this helps.

-TH
Hendo252 is offline   Reply With Quote
Old 04-29-12, 11:00 AM   #7
Kimmo
bike whisperer
 
Kimmo's Avatar
 
Join Date: Dec 2009
Location: Melbourne, Oz
Bikes: copy/paste links: http://velospace.org/node/36949 http://velospace.org/node/47746 http://velospace.org/node/47747
Posts: 7,099
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If I was you I'd read the writing on the wall and get some proper brifters.

You can make Campy brifters work with your Shimano derailleur with a Shiftmate. Alternatively, 8spd Campy brifters and a matching rear derailleur will shift your 7spd cassette perfectly, since it's the same 5mm spacing.

Not sure if there's a Shiftmate for SRAM, but then I'm not sure either how superior Doubletap is to STI.

IMO it's plain as day that Ergo is vastly mechanically superior to STI, and the new hidden cable STI is doubtless an even more horrendously complex rat's nest of bent and pressed steel plate. Yuck.

Bona fides: I've overhauled (complete disassembly) STI and Ergo, and for the record, IMO Shimano stuff is generally better* - except when it comes to brifters.

*Not ultimately better - Campy is porn and SRAM is light, but better in an all-things-considered, average scenario kinda way.

Last edited by Kimmo; 04-29-12 at 11:06 AM.
Kimmo is offline   Reply With Quote
Old 04-29-12, 02:15 PM   #8
IthaDan 
Senior Member
 
IthaDan's Avatar
 
Join Date: Jan 2012
Location: Ithaca, NY
Bikes: Click on the #YOLO
Posts: 4,880
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Some bf member had two pairs of those for sale recently in one of the for sale fora.

Link- http://www.bikeforums.net/showthread...5-STI-shifters
__________________

Shimano : Click :: Campy :: Snap :: SRAM : Bang
IthaDan is offline   Reply With Quote
Old 05-02-12, 04:22 AM   #9
mojobot
Junior Member
Thread Starter
 
Join Date: Apr 2012
Bikes:
Posts: 6
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Righto. Does anyone know if the Sora 3300 7 speed will be compatible?
mojobot is offline   Reply With Quote
Old 05-02-12, 07:15 PM   #10
advicepig
Senior Member
 
Join Date: Aug 2006
Location: Minneapolis, MN, USA
Bikes:
Posts: 60
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've got an RSX 7 speed pair in the basement. They worked fine when I took them off to put on Ultegra a few years ago. PM me if you want to make an offer.
advicepig is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 07:36 AM.