I've never been a Shimano fan but the mechanic at the LBS tells me that Shimano works out the bugs before they go public. He went to a workshop on the new electronic shifting & says the Ultegra is actually better than the DuraAce because they've made some improvements and don't have to recoup the R&D costs (thus it's about $2K cheaper). He said the Shimano electronics are head & shoulders above the others - who are basically just rushing to get to market.
He says the battery should last 500 hours. You know when it's getting low (in case you didn't check or haven't recharged in awhile) because the shifting gets slower.





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