Originally Posted by
gurk700
If you're not riding for performance gains or to know your relative level, great! do what works for you.
Mentioned earlier by @
canklecat = the 'relative level' is in group rides with guys 10-20 years my junior.
Performance gains are attainable without electronic gadgets, to imply otherwise is silly.
Gadgets and data are motivators for a huge percentage of roadies, go for it!
But for better accuracy best to have 2 measurement systems, then you can have 2 data sets to compare.
Be sure to have an iWatch to wear for data collection when not cycling.