A couple weeks ago, my left pedal (Look Keo) undid itself while I was out on a ride. The platform just unscrewed from the spindle. I did my best to get it back on (Look sells a tool to do this, but who has one of those?) and limped my way home. Of course it happened where my choices for routes home all involve a need for speed in order to stay safe and where a mechanical can be deadly. Thankfully, the pedal stayed together on the way home.
So, having passed the first little annoying test, the gods decided to see if I really want to keep riding in the rain, er, liquid sunshine. Yesterday when I took my bike down I found the rear tire was about 80% of the way done. Since it also had a flat, it became 100% done on the spot. After a quick replacement, off I go and wouldn't you know it, as I got to where my pedal had previously failed my left crank arm came loose. I stopped and tightened it up, but we all know what a loose square-taper crank arm means: it's rounding out and needs to be replaced. A mile later, I stopped to tighten it again. A mile later, at the base of a hill where a mechanical issue could be lethal, it needed to be tightened on again. This time, I stuck a bit of blackberry vine into it to help it hold. I turned around and took a less dangerous route home, one where I would not fall under a car if my crank arm came off.
Oh well, I wasn't entirely happy with my move to 175 mm cranks a few years back anyway. Now I have an excuse to change this bike over to the same crank length as my tandem (172.5).
Although I love the local hills, they are hard on cranks. This is the third crank that has worn out in the past 100,000 miles. I rode for decades, over 300,000 miles, in the flat Sacramento Valley with the same 170 mm crankset. They just don't wear out when you are spinning along on the flats.