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

shimano 11 speed cranks with 2 inner chainrings?

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 11 speed cranks with 2 inner chainrings?

Old 10-11-15, 08:37 PM
  #1  
Senior Member
Thread Starter
 
Join Date: Jun 2012
Posts: 878
Likes: 0
Liked 2 Times in 2 Posts
shimano 11 speed cranks with 2 inner chainrings?

I have a 52-36 5800 crankset, curious if I can take off the 52 outer and put on a 38t inner ring.

The application is single speed cx, I wont be shifting between rings, just want the option of running a slightly bigger gear
bikebreak is offline  
Old 10-11-15, 10:12 PM
  #2  
Senior Member
 
catgita's Avatar
 
Join Date: Oct 2014
Location: Long Beach
Posts: 765

Bikes: Fitz randonneuse, Trek Superfly/AL, Tsunami SS, Bacchetta, HPV Speed Machine, Rans Screamer

Likes: 0
Liked 5 Times in 5 Posts
Easy peasy. Small, minuscule, chance it will hit the stays if the frame was meant for smaller inner chainrings.

I had a custom aluminum frame that I converted to SS that wouldn't take a 46 on the inside (not even close), so I put it on the outside, changed the spacers on the rear axle to shift the freewheel to the right, and dished the wheel. If using a freehub, simply change the cog spacers, but don't plan a bash guard.
catgita is offline  
Old 10-12-15, 10:08 AM
  #3  
Senior Member
 
Join Date: Feb 2014
Location: Southern Ontario
Posts: 1,883
Likes: 0
Liked 10 Times in 9 Posts
I think you are going to have a heck of a time finding a 110 mm, 4 arm single speed chain ring.

Just re-reading your post, you want to add a 38 and keep the 36? Wouldn't think it is possible. Plus why bother with only a 2 tooth difference.

Last edited by Slash5; 10-12-15 at 10:12 AM.
Slash5 is offline  
Old 10-12-15, 10:15 AM
  #4  
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,595

Bikes: 8

Liked 1,361 Times in 867 Posts
the space between the 2 chainrings of a double crank is the peoper chainline for a single speed crank..

the middle of a triple is on that chainline center. add a chainguard on the outer and a chain keeper,
to not lose the chain on the inside . riding rough courses and clearing the barriers .

consider replacing the whole crank ? there are many now for the 1 by drivetrain . resell your double to a roadie.
fietsbob is offline  
Old 10-12-15, 10:18 AM
  #5  
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Wisconsin
Posts: 7,954
Liked 92 Times in 75 Posts
Yes, you can easily do it. Since this will be a single-speed application the "right" way to do it is to remove the big ring and use shorter single-speed chainring bolts. But since this will be an 11-speed ring and not an SS specific ring you might be better off leaving the big ring in place or using a chain keeper/FD to prevent it from derailing.

Originally Posted by fietsbob
the space between the 2 chainrings of a double crank is the peoper chainline for a single speed crank..
With today's fancy modern cassette hubs the rear cog (for single-speed use) can be placed anywhere so proper chainline is irrelevant.
FastJake is offline  
Old 10-12-15, 10:24 AM
  #6  
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,595

Bikes: 8

Liked 1,361 Times in 867 Posts
I expect the 11 speed cassette will pack up with mud quite nicely. and stop working , that's Cross Racing ..
fietsbob is offline  
Old 10-12-15, 10:49 AM
  #7  
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Wisconsin
Posts: 7,954
Liked 92 Times in 75 Posts
Originally Posted by fietsbob
I expect the 11 speed cassette will pack up with mud quite nicely. and stop working , that's Cross Racing ..
Then it's a good thing the OP isn't using an 11-speed cassette and is instead using this for SINGLE SPEED.
FastJake is offline  
Old 10-12-15, 11:28 AM
  #8  
Senior Member
 
Join Date: Dec 2014
Posts: 241
Liked 3 Times in 3 Posts
Originally Posted by bikebreak
The application is single speed cx, I wont be shifting between rings, just want the option of running a slightly bigger gear
You cannot.

To avoid confusion thus far, your 5800 crank is Shimano's new 110 BCD 4-bolt with offset. Finding a single speed chainring for these is near impossible. The Shimano 34T-42T chainrings for these cranks are meant for inner mounting and cannot be flipped.
Jamminatrix is offline  
Old 10-12-15, 11:54 AM
  #9  
Constant tinkerer
 
FastJake's Avatar
 
Join Date: May 2010
Location: Wisconsin
Posts: 7,954
Liked 92 Times in 75 Posts
Originally Posted by Jamminatrix
You cannot.

To avoid confusion thus far, your 5800 crank is Shimano's new 110 BCD 4-bolt with offset. Finding a single speed chainring for these is near impossible. The Shimano 34T-42T chainrings for these cranks are meant for inner mounting and cannot be flipped.
Am I the only person that's ever used a multi-speed ring for single speed use? The only potential problem is an increased risk of chain derailment, which can be easily fixed (if it turns out to be an issue) with a front derailer or chain guard.
FastJake is offline  
Old 10-12-15, 11:56 AM
  #10  
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,595

Bikes: 8

Liked 1,361 Times in 867 Posts
Sell the cranks & BB you can buy 2 0r 3 new Adequate cranks for the money some Upgrader will, pay you for that one ..
fietsbob is offline  
Old 10-12-15, 12:04 PM
  #11  
Nigel
 
nfmisso's Avatar
 
Join Date: Mar 2011
Location: San Jose, CA
Posts: 2,991

Bikes: 1980s and 1990s steel: CyclePro, Nishiki, Schwinn, SR, Trek........

Likes: 0
Liked 7 Times in 7 Posts
Originally Posted by FastJake
........ The only potential problem is an increased risk of chain derailment, which can be easily fixed (if it turns out to be an issue) with a front derailer or chain guard.
+1
nfmisso is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
CBee
Singlespeed & Fixed Gear
6
09-05-18 08:20 AM
Chris_W
Bicycle Mechanics
37
12-10-17 10:52 AM
MnHPVA Guy
Bicycle Mechanics
4
10-19-14 09:13 AM
scooterfrog
Bicycle Mechanics
11
08-08-12 06:55 PM
deadly downtube
Bicycle Mechanics
8
11-27-10 06:35 PM

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 - Your Privacy Choices -

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