If you want to play word games, PM me.

J.

Using *your* words is a word game?

Lol, okay.

The most accurate cycling distance is zero. If accuracy is so important to you, just opt for that.

Well, the differences are quite important.

GPS shows about 80% of what the Computer does.

And to be honest I like to have a good record on how many miles Im doing on the bike

With an inaccuracy of that much some simple troubleshooting might figure out what the problem is. A few ideas:


Check the mileage on google maps, mapquest, or a paper map. Compare to the two device readouts.


Ride straight for ~ a mile - see if the two devices differ. If so, then drive it in a car and determine if either of the devices match the car's odometer difference.


If the devices match for a straight mile, then start putting some bends in the test patch.




I'm sure you can figure out some other and likely better ways to test.

Just use a GPS unit paired with a wheel speed sensor. That's what I do. Best of both worlds, or something.

IMO, everything after #22 is just fluff.

and yes, martha, including this post.

My experience was with a few Cateye wireless units. I always did a measured roll out of tire circumference to set the units.

When I started using a Garmin 810 (which does not give a hoot about wheel circumference) I found it accurate to typically .6 miles in 100. Good enough for my use.