Cheap Speedometer

I use my ass to decide weather I want to go slower or faster and not my Speedometer which is probably about 14% off ( 13X45). My question is, is my odometer also 14% off or ???

yes

Thank you Millert

mordicai wrote:

I use my ass to decide weather I want to go slower or faster and not my Speedometer which is probably about 14% off ( 13X45). My question is, is my odometer also 14% off or ???

Good question! I just changed back to a 13 from a 12 and added a new rear 48T. My speedo is off 12mph
at 74, but my odometer was only off .6 miles on a 56 mile ride that I did on Sat. All this is according to my GPS, Speedo/GPS 74/62 mph and 56.3/55.7 miles.

someone will be able to jump in with the numbers, but it is noted around here that the speedo and odo are incorrect from the factory (due to factory error allowances which make the speedo read higher than real speed), but the error is not consistant between the 2. ie. you can fix one or the other, not both.

as can see from your sprocket juggling .6m over 56miles is bee's pube close and prob the difference in the gps logging to actual wheel travel, but you still have 12mph speedo error.

i think personally if the odo is reading under, i'd fix the speedo so i have the faster reacting bike speedo. if the odo reads high, fix odo to slow up milage for resale.

mordicai wrote:

My question is, is my odometer also 14% off or ???

Are you asking about your ass odometer?

God help us all..........

[quote="kbike"]

mordicai wrote:

I use my ass to decide weather I want to go slower or faster and not my Speedometer which is probably about 14% off ( 13X45). My question is, is my odometer also 14% off or ???

Good question! I just changed back to a 13 from a 12 and added a new rear 48T. My speedo is off 12mph
at 74, but my odometer was only off .6 miles on a 56 mile ride that I did on Sat. All this is according to my GPS, Speedo/GPS 74/62 mph and 56.3/55.7 miles.

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I've read this before, that the two are NOT the same, thus the reason for my question. Seems that logic would indicate that they should be the same, but apparently not.

its to do with the speedo error built in at the factory. the speedo is made to reader higher, but the odo is made to be close as possible