Originally Posted by
rpenmanparker
But then how would you know if your DI2 battery was giving you the promised charge lifetime? If the tires you were using were a good buy? When to change your chain and cassette? Or just lube your chain?
Simple, recharge your battery, replace the tires, chain & cassette & apply lube every Monday. Why try to squeeze mileage out of the battery/tires/chain/cassette, lube other than vanity & the ability to say "My < fill in the blank > lasts longer than your < fill in the blank >?"