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


Crank bolt sizes
#1
Hi, bit of a newbie to bike repair. I'm looking to change the front gears on my mountain bike. I've got the correct crank pulling tool, unfortunately I don't have the correct socket to remove the crank bolt. The bolt is bigger than the 14mm socket but smaller than the 17mm. Are there standard sizes of crank bolts (this is a Shimano gear-set, bike bought in the Netherlands, roughly 5-10 years old)? If so what is the most likely size I'll need to buy?
  Reply
#2
OK, if the crank set is Shimano, then the removing tool will fit the cranks (but not necessarily the bolt... been there). The bolt could be 15mm or 16mm, a regular 16mm nut will not fit inside the hole in the crank. The tool to remove small spark plugs could fit (it is 16mm), it did for me. Some bike shops have 15mm and 16mm nuts that are turned down to fit inside the crank hole.
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
6,052
01-02-2022, 04:53 AM
Last Post: Jesper
 
35,998
07-19-2021, 12:00 AM
Last Post: rbx
 
4,001
06-24-2020, 04:13 PM
Last Post: CharleyFarley
 
25,463
12-13-2019, 09:53 PM
Last Post: RJD
 
16,479
03-21-2016, 02:29 PM
Last Post: budstutor
 
6,746
07-21-2014, 09:52 PM
Last Post: Painkiller
 
12,339
04-17-2014, 09:16 AM
Last Post: nfmisso
 
13,496
02-09-2014, 04:52 PM
Last Post: cny-man

Forum Jump:

[-]
10 Latest Posts
Gandolfi "Super" model 1985-86 racing bi...
Yesterday 01:33 PM
How I used to clean my bike
07-03-2025 04:43 PM
Cassette shifting Problem
07-03-2025 02:51 PM
Continued learnings from bikepacking
07-02-2025 04:50 AM
What are the pros and cons of using a 26...
07-02-2025 04:46 AM
I got new Tioga FASTR X Tires (Ask Me An...
07-02-2025 01:31 AM
Attack // Force tire style narrow front ...
07-02-2025 12:55 AM
The great thing about trikes
07-01-2025 11:10 AM
Doctors are Prescribing Cycling
07-01-2025 10:40 AM
How to improve cycling endurance? I've h...
06-30-2025 06:27 PM

[-]
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. GirishH
21 posts
no avatar 2. Flowrider
18 posts
no avatar 3. meamoantonio
14 posts
no avatar 4. Jesper
14 posts
no avatar 5. enkei
11 posts