Nexus Axle Washers

[B607]

I bought a used Nexus 7 coaster and I'm putting it on a pre war Schwinn frame. The hub came with special washers numbered 7L and 7R. They won't work on my frame and I need the correct washers. What numbers do I need and where can I get a pair? My frame is a standard '38-'41 straightbar Schwinn with dropouts pointing to the rear and down.

Also, I read that these washers are to keep the axle from turning. I can see how they would do that, but then what is the purpose of the brake arm? Isn't that the job a brake arm normally does...keeping the axle from turning when braking?
B607

 

[Uncle Stretch]

It dosent make sense ,but they all have them. If you go to that sheldon brown website they show you all the differant ones and what angles they are for.

http://www.sheldonbrown.com/nexus-mech.html#washers

 

[B607]

Thanks. Are they easy to get? B607

 

[Uncle Stretch]

I think everybody has them or can get them look at my last post i added the site where it explains them

 

[Uncle Stretch]

I dont think you will find them on sunday at Walmart . :lol: :lol: :lol: :lol:

 

[user 135]

yes they are easy to get. Probably have your LBS order them. It probably came with yellow and gray. You will need silver(shiny) and white. I had to order some when I changed frames.
http://www.sheldonbrown.com/nexus-mech.html#washers

 

[Korporal]

Check out Sheldon Brown's website, and then Harris Cyclery (where he used to work) if you want to buy one. The simplest way of explaining what they do is explaining what happens when they aren't there: your Sunday cruise is interrupted by popping, clicking and grinding from the rear hub followed by an inability to shift (been there done that). A more in depth explanation is that an internally geared hub has everything spin with respect to the pieces parts that are on the axle. Without the keyed washers, the axle spins thereby throwing the guts of the hub out of alignment. The best explanation involves taking one apart (how I figured this out after neglecting to install them the first time), not for the faint of heart nor for no other reason.

 

[Dorian]

I have a Nexus 7 coaster hub on a bike. When I first got it I found that none of the special axle washers worked on my application, and I had every different set that Shimano makes. So what I did is ground off the tab on one set and torked on the axle nuts really good. I have not had a single problem in 2 years. Those closed ended nuts are very strong.

Dorian

 

[B607]

Thanks Dorian, I will try that. The ones I have are useless anyway. Those nuts are called "acorn nuts", by the way. B607

 

[Dorian]

Thanks Dorian, I will try that. The ones I have are useless anyway. Those nuts are called "acorn nuts", by the way. B607

I have never had a problem with the axle spinning, and I ride the bike pretty hard, you should have no problem.

I should have called the closed ended Shimano axle nuts "cap nuts". Acorn nuts are cap nuts, but not all cap nuts are acorn nuts. Cap nuts better describes them I wish I could get "pike nuts" that have the Shimano thread.

Dorian

 

[B607]

Okay, so educate me. What is the difference between an acorn nut, a cap nut, and a pike nut? I'm guessing a pike nut has a small "sword" sticking out so you can flatten the tires on a rider next to you. No? B607

 

[Dorian]

:?:

What is the difference between an acorn nut, a cap nut, and a pike nut? B607

All closed ended nuts are cap nuts; but are often given more specific names depending on the visual look or style they have. Acorn nuts look like acorns, Pike nuts look like spikes, Etc.

Shimano axle nuts have similarities to Cragar lug nuts, which are closed ended cap nuts but not acorn nuts

Dorian