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

Elementary Cassette Question about spacers

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.

Elementary Cassette Question about spacers

Old 10-22-22, 11:14 AM
  #1  
Plainsman
Senior Member
Thread Starter
 
Join Date: Jan 2005
Posts: 1,505
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 169 Post(s)
Liked 40 Times in 30 Posts
Elementary Cassette Question about spacers

This is a quick an elementary one, but I’m having a memory lapse here. 11 speed Shimano R7000 series cassette on an 11 speed freehub body. Is a spacer still required, and if so what thickness?
Plainsman is offline  
Old 10-22-22, 12:55 PM
  #2  
alcjphil
Senior Member
 
alcjphil's Avatar
 
Join Date: Jun 2002
Location: Montreal, Quebec
Posts: 5,921
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 1815 Post(s)
Liked 1,693 Times in 974 Posts
Depends on the tooth count of the cassette. An 11-34 cassette will require a 1.85 mm cassette. Cassettes with smaller tooth counts don't
alcjphil is offline  
Likes For alcjphil:
Old 10-22-22, 02:54 PM
  #3  
SoSmellyAir
Method to My Madness
 
Join Date: Nov 2020
Location: Orange County, California
Posts: 3,641

Bikes: Trek FX 2, Cannondale Synapse, Cannondale CAAD4, Santa Cruz Stigmata GRX

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1939 Post(s)
Liked 1,463 Times in 1,012 Posts
Originally Posted by Plainsman
This is a quick an elementary one, but I’m having a memory lapse here. 11 speed Shimano R7000 series cassette on an 11 speed freehub body. Is a spacer still required, and if so what thickness?
No spacer needed if you use a CS-R7000 cassette, which (as alcjphil explained above) technically excludes the 11-34 model, which is CS-HG700-11.
SoSmellyAir is offline  
Likes For SoSmellyAir:
Old 10-22-22, 03:34 PM
  #4  
cxwrench
Senior Member
 
cxwrench's Avatar
 
Join Date: Jul 2013
Location: Nor-Cal
Posts: 3,767

Bikes: lots

Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 1958 Post(s)
Liked 2,932 Times in 1,489 Posts
^This^
cxwrench is offline  
Likes For cxwrench:
Old 10-22-22, 05:27 PM
  #5  
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Posts: 38,663

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

Mentioned: 140 Post(s)
Tagged: 1 Thread(s)
Quoted: 5766 Post(s)
Liked 2,538 Times in 1,404 Posts
Originally Posted by Plainsman
This is a quick an elementary one, but I’m having a memory lapse here. 11 speed Shimano R7000 series cassette on an 11 speed freehub body. Is a spacer still required, and if so what thickness?
I do ALL mechanical work operating under the rule that "there are NO rules, everything is about the situation". This would apply perfectly here. In order for the system to work as designed, the cassette must overhang the freehub body by 1-2mm so the lockring can compress thecassette without bottoming against the freehub body.*



*I know that that sounds like a rule, but it follows the logic the situation trumps "rules".
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

Just because I'm tired of arguing, doesn't mean you're right.

“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  
Likes For FBinNY:
Old 10-22-22, 08:03 PM
  #6  
Plainsman
Senior Member
Thread Starter
 
Join Date: Jan 2005
Posts: 1,505
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 169 Post(s)
Liked 40 Times in 30 Posts
Originally Posted by SoSmellyAir
No spacer needed if you use a CS-R7000 cassette, which (as alcjphil explained above) technically excludes the 11-34 model, which is CS-HG700-11.
That’s the exact model I have, glad I asked then! It also has the designation HG-EV and HG-X11 on it. What is the reason that this particular range has a different spacer requirement? I wrongly assumed that the cassette body with on any 11 speed road cassette using the 11 speed narrow chain would be the same.
Plainsman is offline  
Old 10-22-22, 08:17 PM
  #7  
Plainsman
Senior Member
Thread Starter
 
Join Date: Jan 2005
Posts: 1,505
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 169 Post(s)
Liked 40 Times in 30 Posts
Originally Posted by alcjphil
Depends on the tooth count of the cassette. An 11-34 cassette will require a 1.85 mm cassette. Cassettes with smaller tooth counts don't
Digging through my parts drawer I found this. Measures out to 1.84 which seems like it probably is within tolerance. Just to be clear, the spacer required for an 11 speed 11-34, is the same as the adapter spacer for an 8s,
9s, and 10 speed? Thanks for the help!


Plainsman is offline  
Old 10-22-22, 08:18 PM
  #8  
Darth Lefty 
Disco Infiltrator
 
Darth Lefty's Avatar
 
Join Date: May 2013
Location: Folsom CA
Posts: 13,446

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
So it can fit on MTB hubs which didn't get the wider freehubs at 11 speed because the sprockets for 11-12 speed are big enough that they can start to overhang the flange inboard
__________________
Genesis 49:16-17
Darth Lefty is offline  
Old 10-22-22, 08:47 PM
  #9  
Plainsman
Senior Member
Thread Starter
 
Join Date: Jan 2005
Posts: 1,505
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 169 Post(s)
Liked 40 Times in 30 Posts
Originally Posted by Darth Lefty
So it can fit on MTB hubs which didn't get the wider freehubs at 11 speed because the sprockets for 11-12 speed are big enough that they can start to overhang the flange inboard
Ah, I didn’t think about the MTB aspect.
Plainsman is offline  

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


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.