The left crank on my 2020, ~100mi-old Sirrus X 5.0 fell off last weekend. I almost caught it beforehand...felt the pedal arc go "out of round", so i eased up but before i could look down it fell off. The bolts were still tight, but i loosened them up and after inspecting the spindle and crank arm splines (some deformation, but not bad), I was able to reinstall it and properly torque it. I used the torque value shown on the crank arm, and the bolts are now significantly tighter than they were originally. Nevertheless, i took it back to my LBS where i bought it a month ago, and they took it apart, inspected it, and put it back together the same way i did with a new crank button on the end. I checked the torque when i got home, and its the same as what i used.

I also bought a Sirrus X 4.0 for my girlfriend a month ago, so i checked hers, and one of the bolts was significantly under-torqued. The threads didn't feel right when i tried to torque it, so I left it as-is. She had knee surgery two days ago, so hers will sit until Specialized figures out what they're going to do to employ a proper fix. In the meantime, I'm still riding my 5.0 daily and keeping an eye (and torque wrench) on it.

Regardless of these problems, we love these bikes - bought them for "urban exploring" so we can leave our mountain bikes at home and enjoy the nimbleness of this type of "fitness" platform. Both bikes are lightweight (i measured 23.7lbs for the Small 4.0, and 22.8lbs for the Large 5.0), have excellent brakes, and the Future Shock actually helps reduce the small jolts that are transmitted through the bars in pavement settings. Granted, it isn't a regular fork and isn't damped, but it works well for its intended purpose.

Pedal on!