Have questions or want to discuss cycling? Join Now or Sign In to participate in the BikeRide community.

New: Vitesse Signal Giveaway's Winner Announced


Crank arm problem
#1
I was tinkering with my bike a couple months ago and while I was test riding it, the right crank arm fell off. I put it back fast because I was in a parking lot and got back on my bike, then realized I didn't line up the left and right arms correctly so now one points forward while the other faces up or down, and neither will come off. After looking online the only solution I found was a tool called a 'crank puller'. It is very cheap, thankfully, but now the only problem I have is not knowing which size to get. If someone knows how to find what size I need, or if there is another solution, I would appreciate the help.

I know the nut and cover-cap thing isn't on in this picture, I forgot to replace them before taking it.

[attachment=1456]
  Reply
#2
Ok don't quote on this but I do believe that the park cwp-7 will be the one you need. Sure there are. Other make types but parktools do last a very long time
Good maintenance to your Bike, can make it like the wheels are, true and smooth!
  Reply
#3
You say the right side came off? it's usually the left that causes the problems, and this is the one you show in the pic. and this does't appear to have a retaining nut on.
This is a fairly common problem, you should be able to remove this without a special tool except that universal one, the hammer.
Stand on the left of the bike with the crank arm up and rapidly tap the back of the arm, not too hard but quickly and as near to the centre as possible, this will set up a vibration and the arm will usually come off fairly easily, especially as it hasn't been tightened up, you will need a nut to hold it on again and it has to be fitted very tight, or the problem will happen again.
If this doesn't work, I suggest you take it to your LBS, they will do it for you and supply the nut for less than the cost of a tool.
Note that if you ride the bike without the nut and the crank arm becomes loose, you will damage the inside of the locking taper on the arm and need a new arm.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
32,443
07-19-2021, 12:00 AM
Last Post: rbx
 
9,349
08-24-2010, 04:46 AM
Last Post: trevgbb

Forum Jump:

[-]
10 Latest Posts
How many bikes do you have now?
Today 07:31 PM
Happy Holidays
Today 07:25 AM
What was your favourite bicycle?
Yesterday 12:33 PM
How to Trick out your Recumbent Tadpole ...
12-20-2024 09:47 AM
Energy gels for cycling
12-20-2024 06:53 AM
New , To me ..
12-20-2024 04:06 AM
need e-trike advice (wife knee surgery)
12-20-2024 03:58 AM
Looking for Recommendations: E-Trike for...
12-20-2024 03:55 AM
How often check or change mechanical dis...
12-20-2024 03:48 AM
Ketone Ester $$$
12-20-2024 01:54 AM

[-]
Join BikeRide on Strava
Feel free to join if you are on Strava: www.strava.com/clubs/bikeridecom

[-]
Top 5 Posters This Month
no avatar 1. Alexjohnson
41 posts
no avatar 2. GirishH
24 posts
no avatar 3. Flowrider
14 posts
no avatar 4. meamoantonio
12 posts
no avatar 5. Bweighmaster
9 posts