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

New: Take part in the September Giveaway for 29" Giordano® Intrepid Mountain Bike valued at $659


Installing vintage crank arm
#1
I was wondering if anybody knows how to install a 1980's model Raleigh crank arm. It fell off of my friends bike while he was riding. The square bolt is still attached to the bottom bracket. Any help is appreciated.

[attachment=4272]
  Reply
#2
if it fell off, it probably has been loose for a long time and is damaged beyond useable.

That said; unscrew the round cap (a coin works as a screw driver); underneath you will find a loose nut or bolt. Put the crank back on the bottom bracket (BB) axle, re-install the nut or bolt (usually takes a 14mm socket), tighten until the crank is fully seated (no wobble).

If there is any wobble, a new crank is required.
Nigel
  Reply
#3
Awsome thanks that helps a lot. If a new crank is needed, what style/size crank would i look for.
  Reply
#4
(06-27-2013, 06:54 PM)jrippah Wrote:  .... If a new crank is needed, what style/size crank would i look for.

one the same length, for the same side of the bike, same interface to the BB.

For example:
http://www.amazon.com/XLC-Alloy-Crank-Arm-Diamond/dp/B005YO157O/
is 170mm long, for the left side, for a square taper BB.

Note: some cranks for square taper have diamond holes, and some have square; the have to match on both sides of the bike.
Nigel
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
25,348
07-19-2021, 12:00 AM
Last Post: rbx
 
6,629
06-10-2014, 01:47 AM
Last Post: 1FJEF
 
13,291
02-08-2011, 01:17 PM
Last Post: JohnV
 
8,504
08-24-2010, 04:46 AM
Last Post: trevgbb
 
31,622
06-15-2010, 04:06 PM
Last Post: laumi

Forum Jump:

[-]
10 Latest Posts
Glad to be here
Today 04:30 AM
Reasons to buy aluminium not carbon bike...
Today 04:25 AM
Why Are So Many Mountain Bikes Going To ...
Today 04:18 AM
Broken Kids Bike need help.
Yesterday 06:57 PM
1987 Specialized Stumpjumper
Yesterday 07:25 AM
Colnago restoration
Yesterday 05:47 AM
How to refurbish a bicycle 101
09-20-2023 05:08 PM
EBike Battery Charger
09-20-2023 09:14 AM
China has thousands of bikes left to go ...
09-20-2023 09:10 AM
Hincapie Gran Fondo
09-18-2023 03:42 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. ichitan
43 posts
no avatar 2. GirishH
15 posts
no avatar 3. ReapThaWhirlwind
15 posts
no avatar 4. enkei
12 posts
no avatar 5. Talha
11 posts