Bearings on 27" wheel
05-22-20, 10:17 PM
#1
Senior Member
Thread Starter
Bearings on 27" wheel
I'm restoring a '79 Dawes Echelon racer, and just repacked the bearings on the front wheel. I noticed it only had 9 bearings per side, and looked like it could hold 12 at least. Is there a reason for only 9, and could I put more bearings in?
I'm slowing learning how to work on bikes, but sometimes the reason for the way it's put together eludes me.... I think the bearings are the little 3/16ths... should there be more than 9 per side?
I'm slowing learning how to work on bikes, but sometimes the reason for the way it's put together eludes me.... I think the bearings are the little 3/16ths... should there be more than 9 per side?
05-22-20, 10:21 PM
#2
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9 is pretty standard. It just is.
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05-23-20, 02:10 AM
#4
Industry guy
Bearing counts in C&V :
10 balls per side front wheel
11 balls per side crank
9 balls per side rear wheel.
This refers to loose ball design, not retainer styles.
There are exceptions, but not many.
rusty
10 balls per side front wheel
11 balls per side crank
9 balls per side rear wheel.
This refers to loose ball design, not retainer styles.
There are exceptions, but not many.
rusty
05-23-20, 08:56 AM
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If the hubs are pure french....there's a slight possibility they might be 13 balls rear (Maillard Helicomatic), much smaller (3/16 or 5/32) than the ball bearings we see for the typically 10 front and 9 rear.
Again, slight possiblility.
Put enough bearing of the right size in, such that when grouped up, there's still a 2-3mm gap on the non-grouped side. Do a cone test, see how high the bearings ride. Somewhere in the middle to 2/3 up is good.
=8-|
Again, slight possiblility.
Put enough bearing of the right size in, such that when grouped up, there's still a 2-3mm gap on the non-grouped side. Do a cone test, see how high the bearings ride. Somewhere in the middle to 2/3 up is good.
=8-|
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5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
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5000+ wheels built since 1984...
Disclaimer:
1. I do not claim to be an expert in bicycle mechanics despite my experience.
2. I like anyone will comment in other areas.
3. I do not own the preexisting concepts of DISH and ERD.
4. I will provide information as I always have to others that I believe will help them protect themselves from unscrupulous mechanics.
5. My all time favorite book is:
Kahane, Howard. Logic and Contemporary Rhetoric: The Use of Reason in Everyday Life
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05-23-20, 09:35 AM
#6
Really Old Senior Member
I'm restoring a '79 Dawes Echelon racer, and just repacked the bearings on the front wheel. I noticed it only had 9 bearings per side, and looked like it could hold 12 at least. Is there a reason for only 9, and could I put more bearings in?
I'm slowing learning how to work on bikes, but sometimes the reason for the way it's put together eludes me.... I think the bearings are the little 3/16ths... should there be more than 9 per side?
I'm slowing learning how to work on bikes, but sometimes the reason for the way it's put together eludes me.... I think the bearings are the little 3/16ths... should there be more than 9 per side?
If 3/16"-
16 = 3".
8 = 1-1/2".......
I have ran into Huffy's with 9 1/4" balls/side in the front.
05-23-20, 06:03 PM
#7
Senior Member
Thread Starter
Thanks for all the input guys. Feeling kinda dumb right now. Decided to search the floor area where I had worked on my wheel. Found 2 bearings. Measured them, 1/4". So the answer for front late 70s Mavic rims is 10, 10 bearings per side!
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05-23-20, 07:15 PM
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I was going to say that if you were able to get 12 bearings into the hub, it would mean that the bearings were the wrong size.
I used to have a Park ruler that measured spoke lengths, cotter pin sizes and ball bearing sizes. Now if I need to check a ball bearing size I use my drill bit sizing guide. Those are available at nearly every hardware store.
Cheers
I used to have a Park ruler that measured spoke lengths, cotter pin sizes and ball bearing sizes. Now if I need to check a ball bearing size I use my drill bit sizing guide. Those are available at nearly every hardware store.
Cheers
05-23-20, 07:51 PM
#9
Really Old Senior Member
It's the hubs that matter.
Never seen a hub that took 10 1/4"balls/side.
05-23-20, 07:57 PM
#10
Senior Member
Thread Starter
Read my caliper wrong. Pretty sure they are 3/16". It's a Shimano hub.
I'm almost blind in one eye, and forgot to use my magnifying glass.
Did I mention I'm almost 60 with a few medical problems?
I'm almost blind in one eye, and forgot to use my magnifying glass.
Did I mention I'm almost 60 with a few medical problems?
Last edited by johnspack; 05-23-20 at 09:14 PM.
