Builder's Spotlight The Paceline Forum Builder's Spotlight


Go Back   The Paceline Forum > General Discussion

Reply
 
Thread Tools Display Modes
  #1  
Old 02-11-2019, 06:26 AM
pinkshogun's Avatar
pinkshogun pinkshogun is offline
Senior Member
 
Join Date: Aug 2010
Location: rhode island
Posts: 2,034
Ultegra 10 speed rear der. with 8 speed brifters?

does the rear derailer have an incompatible pull ratio to work properly with shimano 8 speed brifters
Reply With Quote
  #2  
Old 02-11-2019, 07:18 AM
oldpotatoe's Avatar
oldpotatoe oldpotatoe is offline
Proud Grandpa
 
Join Date: Oct 2009
Location: Republic of Boulder, USA
Posts: 35,880
Quote:
Originally Posted by pinkshogun View Post
does the rear derailer have an incompatible pull ratio to work properly with shimano 8 speed brifters
Yes, compatible with all but that unique in this world, DA 8s STI and DT shifters..
__________________
Chisholm's Custom Wheels
Qui Si Parla Campagnolo
Reply With Quote
  #3  
Old 02-11-2019, 03:24 PM
Alaska Mike Alaska Mike is offline
Senior Member
 
Join Date: Aug 2016
Location: Anchorage, AK
Posts: 203
Quoted from Bike Radar

Quote:
Shimano derailleur compatibility

Older generation 8- and 9-speed Shimano mountain bike and road kit is mostly inter-compatible since until the introduction of Dyna-sys on 10-speed mountain bike groupsets, they both used the same cable pull ratio.

This means that you can use an 8 -or 9-speed mountain bike derailleur with road shifters or vice versa.

This lowly 9-speed, Deore mech is compatible with nearly two decades worth of drivetrains
This lowly 9-speed, Deore mech is compatible with nearly two decades worth of drivetrains

The only exception is pre-1997, 9-speed Dura-Ace gear which won’t play nicely with anything as it uses a totally different cable pull ratio.

Although it initially doesn’t appear to be the case, the situation is a bit more clear with the newest generation of both Shimano road and mountain bike components. Bear with us...
Shimano road bike derailleur compatibility

All 11-speed Shimano road components are inter-compatible — you could for example use a Dura-Ace 9000 derailleur with a pair of 105 5800 shifters
All 10-speed road components (except Tiagra 4700, see below) are inter-compatible — you could for example use an old Ultegra 6600 derailleur with old, 105 5700 shifters
Current 9-speed road components are backwards compatible with older 9-speed road and mountain bike components, excluding the aforementioned exception

The only exception to the above rules is Tiagra 4700 (and the associated RS405 hydraulic shifters) which uses the same cable pull ratio as current generation, 11 speed road kit. This means you could for example use an 11 speed derailleur with 10 speed, 4700 shifters.
__________________
My egocentric bike blog
Reply With Quote
  #4  
Old 02-11-2019, 09:37 PM
dancinkozmo dancinkozmo is offline
Senior Member
 
Join Date: Jan 2007
Posts: 2,135
^

Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 02:00 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.