Originally Posted by
MSchott
What causations in those scenarios lead to the need for adjustment? I don't put as many miles on a bike as many here do and rarely ride in the rain but the 105 on my 2017 Roubaix SL4 bought NOS in 2019 has never needed an adjustment outside of the first adjustment a few hundred miles in.
I have a friend who rides 12,000 miles a year. He has his cables replaced two to three times a year. The more you ride, the more you shift. The more you ride in the rain, the more likely your cables will get water in them, which causes corrosion. One Di2 first came out, there was a video where team mechanics were asked about what they liked most about Di2 and it was that there was no need to do adjustments once the bike was setup.