Determining Axle Diameter and Threading
12-21-07 | 11:12 PM
#1
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Joined: May 2005
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From: in the hills of Orange, CA
Determining Axle Diameter and Threading
I have an 88 Specialized Hardrock with 6 speed Suntour componentry, although I can't tell who is the manufacturer of the rear hub. I'd like to replace the solid rear axle with one that is QR compatible.
I know my choices for the diameter are 9.5mm (3/8"), or 10mm. The diameter measures 9.5mm at the threads but 9mm at the unthreaded portion. So I guess I need a 9.5mm, right?
That then leaves me to the threading, choices are 24tpi, 26tpi, or 1mm. How do I tell by looking? Or is it likely to be 26tpi, since that seems to be all I can find in 9.5mm?
I know my choices for the diameter are 9.5mm (3/8"), or 10mm. The diameter measures 9.5mm at the threads but 9mm at the unthreaded portion. So I guess I need a 9.5mm, right?
That then leaves me to the threading, choices are 24tpi, 26tpi, or 1mm. How do I tell by looking? Or is it likely to be 26tpi, since that seems to be all I can find in 9.5mm?
12-22-07 | 12:04 AM
#2
Gone, but not forgotten
Joined: Jul 2002
Posts: 2,301
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From: Newtonville, Massachusetts
Bikes: See: https://sheldonbrown.org/bicycles
I have an 88 Specialized Hardrock with 6 speed Suntour componentry, although I can't tell who is the manufacturer of the rear hub. I'd like to replace the solid rear axle with one that is QR compatible.
I know my choices for the diameter are 9.5mm (3/8"), or 10mm. The diameter measures 9.5mm at the threads but 9mm at the unthreaded portion. So I guess I need a 9.5mm, right?
I know my choices for the diameter are 9.5mm (3/8"), or 10mm. The diameter measures 9.5mm at the threads but 9mm at the unthreaded portion. So I guess I need a 9.5mm, right?
3/8"-24 is mainly used for coaster brakes.
Never heard of 9.5 x 1mm.
Wheels Inc is the best.
Sheldon "26 TPI" Brown
