BUT- my bike speedo says 25.25 miles, and my Etrex (worn on a belt clip) says - 24.82!

So - should I rejoice in my 25, or recalibarate my bike speedo and admit to only 24.8 - decisions, decisions ...
bikes4two wrote:> I would think the bike speedo, if correctly set up in the first place (measure tyre circumference on a path using chalk marks etc) is more accurate than a GPS
> The bike speedo will record distance travelled rather than the distance between points, i.e. when taking a less than straight line along the road or zig-zagging (for what ever reason).
> Errors from the GPS due to processors speed rates, app accuracy and app algorithms, signal fade (buildings, trees, atmospheric conditions) and others.
> Having said that I use both and don't really care about discrepancies after all my years of cycling, even to the extent that I rarely look at the speedo ODO before setting off, relying on local route knowledge and how tired I feel after a ride which is good enough for me (but each to their own).
> Bottom line - as others have indicated, there are differences in the measured values but they are not of an order to both most folks.
Yes.NATURAL ANKLING wrote:Has anyone got the satnav to read longer than an online route planner?