Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Shimano Acera 8 speed compatible with a 9 speed SLX rear Cassette?

Notices
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.

Shimano Acera 8 speed compatible with a 9 speed SLX rear Cassette?

Old 11-25-13, 11:06 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Shimano Acera 8 speed compatible with a 9 speed SLX rear Cassette?

I have a Diamond back Response, which I bought a Mavic Cross ride wheel set that has a SLX 11-34 9 speed cassette. Current 8 speed cassette (Acera) is a 11-30 which the SLX is 11-30 in 8 of the 9 clogs. I really don't need the extra ring with 4 teeth. I was thinking on just using the 8 gears and ignoring the last ring. I am sure this has come across in the past but its a big forum to read it all
All I want to do for now is use the shifter and brake levers for the the new disc Mechanical brakes and use the 8 speeds of the rear cassette. As I said the 4 extra teeth I do not need, if I need that I need that Ill need to find another hill to climb lol.

So? Is it possible to use the Acera derailor with a SLX cassette? If so what possible problems I may have?
DB Mike is offline  
Old 11-25-13, 11:24 AM
  #2  
Senior Member
 
demoncyclist's Avatar
 
Join Date: Oct 2002
Location: Medway, MA
Posts: 2,727

Bikes: 2011 Lynskey Sportive, 1988 Cannondale SM400

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
You will need to put the 8 speed cassette on the new wheel. The spacing between the cogs is different (9 cogs in the same space as 8), so it will not work correctly.
demoncyclist is offline  
Old 11-25-13, 11:25 AM
  #3  
Senior Member
 
Join Date: Jun 2010
Location: Pearland, Texas
Posts: 7,579

Bikes: Cannondale, Trek, Raleigh, Santana

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 308 Post(s)
Liked 3 Times in 3 Posts
Originally Posted by DB Mike
...So? Is it possible to use the Acera derailor with a SLX cassette? If so what possible problems I may have?
If you don't have the tools to remove the cassettes have the bike shop swap the 8S cassette onto the new wheel.

Brad
bradtx is offline  
Old 11-25-13, 11:40 AM
  #4  
Senior Member
 
Join Date: Jan 2012
Location: Spokane, WA
Posts: 2,255

Bikes: Specialized Sequoia Elite/Motobecane Fantom Cross Team Ti/'85 Trek 520

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Likes: 0
Liked 3 Times in 3 Posts
Won't work, need to put the 8 speed cassette on your new wheel. As pointed out, spacing is different. I imagine the shop would charge 5-10 dollars or so to swap the cassette.
bobotech is offline  
Old 11-25-13, 11:53 AM
  #5  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks, thats all I needed to know I am sure the tool will be around the same price
DB Mike is offline  
Old 11-25-13, 12:01 PM
  #6  
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,095 Times in 741 Posts
Originally Posted by DB Mike
Thanks, thats all I needed to know I am sure the tool will be around the same price
You need two tools; the correct model lockring tool and a chainwhip. A large adjustable wrench is needed to turn the lockring tool or you can clamp it in a bench vise with the wheel on top.
HillRider is offline  
Old 11-25-13, 12:04 PM
  #7  
Disco Infiltrator
 
Darth Lefty's Avatar
 
Join Date: May 2013
Location: Folsom CA
Posts: 13,775

Bikes: Stormchaser, Paramount, Tilt, Samba tandem

Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
Quoted: 3126 Post(s)
Liked 2,102 Times in 1,366 Posts
The 9-speed cogs are closer spaced, so the shifter pulls less cable per click. You can do it by using the "Hubbub" cable routing on the rear derailleur. (I haven't tried it but I was looking at all this stuff for updating a classic bike with modern shifters.)
Darth Lefty is offline  
Old 11-25-13, 12:36 PM
  #8  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I ordered a cog remover tool and chainwhip just hope the acera cog set will fit on the SLX set
DB Mike is offline  
Old 11-25-13, 12:43 PM
  #9  
Collector of Useless Info
 
Join Date: Aug 2009
Posts: 1,407
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by Darth Lefty
The 9-speed cogs are closer spaced, so the shifter pulls less cable per click. You can do it by using the "Hubbub" cable routing on the rear derailleur. (I haven't tried it but I was looking at all this stuff for updating a classic bike with modern shifters.)
It's not the "Hubbub cable routing", it's the "Alternate cable routing" you want. The Hubbub routing decreases derailleur movement compared to cable pull, where the Alternate cable routing increases it.
cycle_maven is offline  
Old 11-25-13, 12:59 PM
  #10  
Disco Infiltrator
 
Darth Lefty's Avatar
 
Join Date: May 2013
Location: Folsom CA
Posts: 13,775

Bikes: Stormchaser, Paramount, Tilt, Samba tandem

Mentioned: 72 Post(s)
Tagged: 0 Thread(s)
Quoted: 3126 Post(s)
Liked 2,102 Times in 1,366 Posts
Originally Posted by cycle_maven
It's not the "Hubbub cable routing", it's the "Alternate cable routing" you want. The Hubbub routing decreases derailleur movement compared to cable pull, where the Alternate cable routing increases it.
No, I got it right, you want to decrease the movement to make the 8-speed shifter work with 8 gears of the 9-speed cassette. The "alternate" which increases movement is for making old Dura-Ace work with the other systems.
Darth Lefty is offline  
Old 11-25-13, 02:43 PM
  #11  
Senior Member
 
Join Date: Oct 2007
Location: West Yorkshire, United Kingdom
Posts: 5,773
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 453 Post(s)
Liked 104 Times in 87 Posts
Originally Posted by DB Mike
I ordered a cog remover tool and chainwhip just hope the acera cog set will fit on the SLX set
It will work, Shimano uses the same lockring throughout it's range, from 7 to 11 speeds.
jimc101 is offline  
Old 11-25-13, 03:57 PM
  #12  
Collector of Useless Info
 
Join Date: Aug 2009
Posts: 1,407
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Originally Posted by Darth Lefty
No, I got it right, you want to decrease the movement to make the 8-speed shifter work with 8 gears of the 9-speed cassette. The "alternate" which increases movement is for making old Dura-Ace work with the other systems.
Yep, you're right. I didn't read the original post carefully enough. I thought the OP had 9-speed shifters.

The best option is to swap the 8-speed cassette to the new wheel, after all. I think the Hubbub routing isn't quite the right ratio for converting 8-speed shifters to 8-of-9 cassette.
cycle_maven is offline  
Old 11-25-13, 04:26 PM
  #13  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks all, when I looked at the cogs, I noticed it seamed tighter on the 9 speed cog over the 8 speed this is why I asked. Thanks for the info you all gave.
DB Mike is offline  
Old 11-26-13, 08:53 AM
  #14  
Senior Member
 
Join Date: Mar 2012
Location: southeastern PA - a mile west of Philadelphia
Posts: 430
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Darth Lefty
No, I got it right, you want to decrease the movement to make the 8-speed shifter work with 8 gears of the 9-speed cassette. The "alternate" which increases movement is for making old Dura-Ace work with the other systems.
+1
Gnosis is offline  
Old 12-04-13, 01:25 PM
  #15  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
FYI ....I did a test they do work together only difference is in the final high gear it skips a gear and goes into the 9th gear.
DB Mike is offline  
Old 12-04-13, 04:00 PM
  #16  
Senior Member
 
Join Date: May 2011
Location: Upstate NY
Posts: 3,794

Bikes: Bianchi San Mateo and a few others

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 634 Post(s)
Likes: 0
Liked 13 Times in 9 Posts
Originally Posted by DB Mike
FYI ....I did a test they do work together only difference is in the final high gear it skips a gear and goes into the 9th gear.
It'll work ...sort of. You can set the derailleur and chain to be aligned perfectly with any one cog on the cassette. Each shift away from that one aligned gear gets further and further out of whack. You'll probably have a few gears that work fairly smoothly and a few that work with a little chatter. Shift past those and it'll get progressively worse.
SkyDog75 is offline  
Old 12-09-13, 08:07 AM
  #17  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I do plan on changing the cassette to the 8 speed,when I get the right lock ring tool (hopefully any day now). Until than the 9 speed is working ok, yes it not working perfect but gets me where I am going with out major problems. Hopefully in the near future I can upgrade my rear derailer to the 9 speed.
DB Mike is offline  
Old 12-09-13, 08:49 AM
  #18  
Really Old Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 13,822

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1774 Post(s)
Liked 1,230 Times in 851 Posts
Originally Posted by DB Mike
I do plan on changing the cassette to the 8 speed,when I get the right lock ring tool (hopefully any day now). Until than the 9 speed is working ok, yes it not working perfect but gets me where I am going with out major problems. Hopefully in the near future I can upgrade my rear derailer to the 9 speed.
It's your shifter that's not compatible.
Bill Kapaun is offline  
Old 12-09-13, 12:49 PM
  #19  
Junior Member
Thread Starter
 
Join Date: Nov 2013
Posts: 8
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Bill Kapaun
It's your shifter that's not compatible.
So your saying its the shifter not the derailer thats the problem? Even if it is I still like to upgrade from Acera.
DB Mike is offline  
Old 12-09-13, 12:53 PM
  #20  
Really Old Senior Member
 
Bill Kapaun's Avatar
 
Join Date: Feb 2007
Location: Mid Willamette Valley, Orygun
Posts: 13,822

Bikes: 87 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 1774 Post(s)
Liked 1,230 Times in 851 Posts
IF indexed shifting, the number of "speeds" on the shifter must match the number of "speeds" on the cassette.
A 9 speed shifter pulls less cable per shift than an 8 than a 7...
7 speed = 5mm cog spacing.
8 speed = 4.8mm cog spacing.
9 speed = 4.34mm cog spacing.

The RDER doesn't know how many "speeds" it is. It just moves what the cable pull moves it.
Bill Kapaun is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
67tony
Bicycle Mechanics
17
11-28-16 02:16 AM
ModeratedUser
Bicycle Mechanics
19
05-06-15 10:55 AM
sam_cyclist
Road Cycling
67
02-20-15 12:55 PM
pgoat
Bicycle Mechanics
10
06-26-14 04:22 PM
hauk
Bicycle Mechanics
11
10-05-10 06:50 AM

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.