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


Thread size/diameter for fender eyelets
#1
Is there a standard (or at least common) thread size and diameter for fender eyelets? I have old bikes for which there are no specs or OEM fender bolts, but a lot of fenders are sold with mounting hardware so I'm guessing they are all the same, no?

It would be nice to be able to pick them up at the hardware store... I like to support the LBS but they seem to act more inconvenienced than happy to help for small purchases (in some cases, certainly does not apply to all shops/employees).
  Reply
#2
You can get replacement parts for some fenders from your LBS, but they'll likely have to special order them. Are you able to upload a photo so we can help you track something down?
  Reply
#3
(11-24-2009, 03:12 PM)Alex Ramon Wrote:  You can get replacement parts for some fenders from your LBS, but they'll likely have to special order them. Are you able to upload a photo so we can help you track something down?

Thanks Alex Smile I think I worded my post poorly though as I'm not looking for replacement parts for fenders; I'm just curious about the thread size and diameter for fender eyelets brazed onto forks and stays, near the dropouts. They look identical on every bike I've ever seen with eyelets, by eyeballing anyway, so it got me to wondering if they are standardized. My purpose isn't specifically for fenders, but for future hacks that might involve the eyelets... that and I'm just kind of geeky so I like to know these things.
  Reply
#4
All my bikes have 5mm threaded mudguard (fender) eyelets.
Ride hard or ride home alone!
  Reply
#5
(11-24-2009, 04:29 PM)cyclerUK Wrote:  All my bikes have 5mm threaded mudguard (fender) eyelets.

Thanks! I will try 5mm :-)
  Reply
#6
The bolts holes if I am right use a 10/32 tap. I use mine here to clean out the holes before I use any bolts to hold my fenders on. I hope we are talking about the bolts holes if not let me back out here. Just trying to help out a little.
My dad always told me a Sledge a matic can fix any thing.
  Reply
#7
10/32" is about 8mm... weird. By the way: Almost everything (except headsets and bearing balls) on bikes is metric. I am not sure but I think that also the "tpi" between metric and imperial threads of the same diameter are different. Maybe somebody can comment on that?
  Reply


Possibly Related Threads...
Thread
Author
Replies
Views
Last Post
 
116,770
04-05-2024, 10:30 AM
Last Post: Frankly
 
3,058
07-31-2019, 02:11 PM
Last Post: Joe_W
 
16,998
12-02-2013, 09:48 PM
Last Post: 1FJEF
 
9,235
08-11-2013, 08:22 PM
Last Post: 1FJEF

Forum Jump:

[-]
10 Latest Posts
What are your best biking places in your...
Yesterday 04:21 AM
find a cycling buddy?
Yesterday 03:37 AM
Hot Weather Safety
Yesterday 03:08 AM
Gandolfi "Super" model 1985-86 racing bi...
06-23-2025 10:55 PM
AI ACTION FIGURE!
06-23-2025 05:07 PM
First long distance ride..
06-23-2025 06:30 AM
Post-Ride Nutrition
06-23-2025 01:44 AM
Hello everyone
06-22-2025 09:17 AM
How often check or change mechanical dis...
06-19-2025 08:59 PM
Pre Ride Food Intake
06-19-2025 07:22 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. GirishH
20 posts
no avatar 2. Flowrider
18 posts
no avatar 3. Criminal
16 posts
no avatar 4. rydabent
15 posts
no avatar 5. SPINMAN
11 posts