Ball Bearing Sizes

[Porter]

Could someone help please?

I measured my headset ball bearings with a micrometer, and they are 4.35mm.

I can't find 4.35mm ball bearings anywhere on the net.

Could anyone help please?

Thanks

 

[Nob]

Bearings I know of for headsets are;

• 5/32″ balls are 3.97mm
• 3/16″ balls are 4.76mm

• 1/8″ balls are 3.18mm
• 1/4″ balls are 6.35mm

 

[jim haseltine]

11/64" bearings are classed as 4.37mm (actually they're 4.365mm) and are readily available. Well, for a given value of 'readily' - you'll be unlikely to find them in a LBS or hardware store but any bearing supplier should have them.
I'd be curious as to what headset they fit in as it's not a size I've ever seen used.

 

[Nob]

11/64" bearings are classed as 4.37mm (actually they're 4.365mm) and are readily available. Well, for a given value of 'readily' - you'll be unlikely to find them in a LBS or hardware store but any bearing supplier should have them.
I'd be curious as to what headset they fit in as it's not a size I've ever seen used.

Oddball size so what is the brand of headset being used here?

 

[averagebiker]

Could someone have used the wrong size? Could they have worn down from the next size up??
Rich