Measuring axles
Extreme HDF Member
Joined: Jun 2014
Posts: 11,448
Likes: 2,299
From: NW Ohio
Disregarding length...
There are three axle diameters: 3\4", 25mm, & 1"(25.4mm).
Two were used on the small diameter (39mm & 41mm) forks: 3/4 & 1.
Two were used on the larger diameter (49mm) forks: 1" & 25mm.
The 49mm sliders will accept either large diameter axle but the bearings are different.
That .4mm (.016") really does make a difference. A 1" bearing will slide easily over a 25mm axle and may even seem OK, but it isn't correct.
As far as measuring goes, I suggest buying a set of calipers and a tape measure.
There are three axle diameters: 3\4", 25mm, & 1"(25.4mm).
Two were used on the small diameter (39mm & 41mm) forks: 3/4 & 1.
Two were used on the larger diameter (49mm) forks: 1" & 25mm.
The 49mm sliders will accept either large diameter axle but the bearings are different.
That .4mm (.016") really does make a difference. A 1" bearing will slide easily over a 25mm axle and may even seem OK, but it isn't correct.
As far as measuring goes, I suggest buying a set of calipers and a tape measure.
Last edited by cggorman; Mar 13, 2018 at 11:04 AM.
Extreme HDF Member
Joined: Jun 2014
Posts: 11,448
Likes: 2,299
From: NW Ohio
Measure the distance between the centers of the forks. That will determine if it's narrow, mid, or wide.
Measure the diameter of the tubes. That will determine the year range.
After that, let us know and we can tell you the model. Then you can order from any catalog.
Measure the diameter of the tubes. That will determine the year range.
After that, let us know and we can tell you the model. Then you can order from any catalog.
Club Member
Joined: Oct 2011
Posts: 11,174
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From: Nor Cal
If this legit, post the link to online Photo(s). If it's an Original Harley frontend and the photo(s) are Not Terrible, it should be pretty easy to identify.
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6th Gear
Joined: Mar 2018
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From: Fenton
Thank you very much
Road Warrior
Joined: Mar 2014
Posts: 1,623
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From: nowhere
Sounds familiar...Sort of what I said a WEEK and 6 threads ago
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