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

Raleigh Eclipse Folding Bike - how to remove crank arm and chain ring?

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.

Raleigh Eclipse Folding Bike - how to remove crank arm and chain ring?

Old 09-29-18, 02:29 PM
  #1  
ludcycol
Newbie
Thread Starter
 
Join Date: Sep 2018
Location: London
Posts: 3

Bikes: 3+1ebike old frego hawk, old raley folding, rebuilt unknown but fits me size,b fold bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Raleigh Eclipse Folding Bike - how to remove crank arm and chain ring?

Hi everyone,


I am trying to help a friend with fixing his bicycle, a raleigh eclipse folding bike (they re not too pretty and it's a cheap one but in good nick except these damaged parts).

The thread of the drive side crankarm is gone. The chain ring is bent as a result of hitting it with a hammer to get it out instead of getting the right tool (applauses here thank you). I have been reading a lot already but can't find anything specific and I'm still having unsolved questions.

Please do correct me, I am here to learn for good and practice the right way.

I'll also try to be methodical in my questioning (hopefully my pics will load up and they'll be informative [EDIT: I could not post pics, keep getting message ""You are not allowed to post URLs until you have at least 10 posts]):
  • I am trying to identify the crank arm type. My guess is it's a 2 pieces-set crank arm.

(It's a Thun bottom bracket.)
  • I need to know what tool to remove the crank arm and chainring (unless they are separate as in a 3 pieces set).

(I do have a bikehhut removal tool but it doesn't appear to fit unless I'm using it wrong.)
  • I need to know how to get a suitable replacement for the above parts which I should be finding out by counting the teeth?

(Am I right to think that there's no BCD on this as there is no bolt or should I be measuring the chainring diameter?)


First time posting, Your help's much appreciated. I m good with my hands and better at mechanics than I used to be but still manage to do some right f*** ups.

Last edited by ludcycol; 09-29-18 at 02:50 PM.
ludcycol is offline  
Old 09-29-18, 09:57 PM
  #2  
Jeff Wills
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Posts: 8,960
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 427 Post(s)
Liked 17 Times in 13 Posts
From pictures I found online, the cranks appear to be conventional 3-piece type with a square-taper axle. Here's the generic remove-and-replace instructions:
https://www.parktool.com/blog/repair...on-three-piece

It looks like you have a very cheap setup where the chainring is a stamped piece of steel swaged onto an aluminum crankarm. You'll have to figure out how to remove the crankarm with a gear puller or other shop tool if the threads are completely gone. Destructive removal is also a possibility since the existing crank is beyond repair.

Assuming there are no quirks about the bike's design that would prevent it, you could replace the crank with a common single-speed crankset. You can count the number of teeth on the chainring to find a suitable replacement.
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline  
Old 09-30-18, 06:06 AM
  #3  
andrewclaus
Senior Member
 
Join Date: Feb 2012
Location: Golden, CO
Posts: 1,514

Bikes: 2016 Fuji Tread

Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 219 Post(s)
Likes: 0
Liked 17 Times in 15 Posts
I use a "pickle fork" (automotive ball joint remover) for square tapered crank arm removal. After a drop or two of penetrating oil.
andrewclaus is offline  
Old 10-06-18, 02:47 PM
  #4  
ludcycol
Newbie
Thread Starter
 
Join Date: Sep 2018
Location: London
Posts: 3

Bikes: 3+1ebike old frego hawk, old raley folding, rebuilt unknown but fits me size,b fold bike

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Thanks I went for 'Destructive removal' route and it went ok. Now going to replace chainring and crank arm and pedal.
ludcycol is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
mfennell
Road Cycling
2
08-01-07 08:25 AM
onelesscar
Bicycle Mechanics
1
10-20-05 05:56 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


Thread Tools
Search this Thread

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

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.