My Speedometer is off.....
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Tourer
Joined: Feb 2015
Posts: 370
Likes: 16
From: Kansas
My Speedometer is off.....
I just replaced my stock front rim & tire with a 21". I have noticed that my speedometer is off. About 5 mph at 45 mph. Is there a fix for this or am I just going to have to live with it?
Thanks Chad
Thanks Chad
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
It would have to be a cable driven speedo off the front wheel. Electronic speedometers are driven off the transmission and changing the front wheel would have no effect.
Thread Starter
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Tourer
Joined: Feb 2015
Posts: 370
Likes: 16
From: Kansas
It is cable driven from the front wheel.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
You're just gonna have to live with it.
Believe it or not 16", 19", and 21" wheels all have about the same tire height.
FWIW my '95 Heritage is 4 mph off at all speeds.
Believe it or not 16", 19", and 21" wheels all have about the same tire height.
FWIW my '95 Heritage is 4 mph off at all speeds.
Seasoned HDF Member
Joined: Dec 2006
Posts: 8,216
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From: Black Hills
Speedo drive units can have different ratios - usually a bagger has a 2:1 ratio according to the replacement fitment charts. The 2240:60 ratio fitment list softail and dynas models but it would take more research to determine if those models have 21" wheels. The widths also vary. This might be a solution.
I replaced a stock 16" front wheel with a 19" enforcer wheel and that was less than 1/8" taller. I really didn't notice the change for my odometer.
Updated: Based on the Drag Specialties Fitment charts on the Dennis Kirk site, what I saw was the 2240:60 ratio was for models with 21" wheels.
I replaced a stock 16" front wheel with a 19" enforcer wheel and that was less than 1/8" taller. I really didn't notice the change for my odometer.
Updated: Based on the Drag Specialties Fitment charts on the Dennis Kirk site, what I saw was the 2240:60 ratio was for models with 21" wheels.
Last edited by rizzo; Apr 1, 2018 at 05:38 PM.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
Speedo drive units can have different ratios - usually a bagger has a 2:1 ratio according to the replacement fitment charts. The 2240:60 ratio fitment list softail and dynas models but it would take more research to determine if those models have 21" wheels. The widths also vary. This might be a solution.
I replaced a stock 16" front wheel with a 19" enforcer wheel and that was less than 1/8" taller. I really didn't notice the change for my odometer.
I replaced a stock 16" front wheel with a 19" enforcer wheel and that was less than 1/8" taller. I really didn't notice the change for my odometer.
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Thread Starter
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Tourer
Joined: Feb 2015
Posts: 370
Likes: 16
From: Kansas
Thanks for the responses. Wasn't sure if there was a fix or not. Don't mind living with it the way it is.
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Joined: May 2011
Posts: 92
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From: Wisconsin
speedhut.com 4 1/2 inch GPS speedo. I recently did mine and absolutely love it,it has the tach as well. gives a lot of info 0-60... 1/4 mile.... altitudes... direction....and even has a digital readout besides the pointer" in the display info screen. I dealt with the 21 inch front wheel issues on my shovelhead with front drive..it was always off roughly 7 mph ( @ 70 I would actually be doing about 62 ish* )..plus one less cable hanging off the front end of my 93 heritage softail dead nuts accurate.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
speedhut.com 4 1/2 inch GPS speedo. I recently did mine and absolutely love it,it has the tach as well. gives a lot of info 0-60... 1/4 mile.... altitudes... direction....and even has a digital readout besides the pointer" in the display info screen. I dealt with the 21 inch front wheel issues on my shovelhead with front drive..it was always off roughly 7 mph ( @ 70 I would actually be doing about 62 ish* )..plus one less cable hanging off the front end of my 93 heritage softail dead nuts accurate.
How does yours handle the rain?