I just want to give my experience to people. I purchased the left sided only version in March-ish if I remember correctly. I have gone through 3 pairs and gave up and am switching to XX1/Quarq. In total I probably rode about 60-80 moving time hours or so on them. I ride a 2020 spark RC, and due to 175 cranks, a low BB, long pedal stack, and a LOT of PA/NY baby head rock gardens the pedals did take their fair share of strikes, over those hours.
First pair I rode for probably 6 weeks or so when the battery cap somehow loosened itself and I didn’t notice. I had not touched the cap at all out of the box. I don’t know if it came not torqued appropriately or if it rattled loose over time. I suspect the latter. It stopped working with that current battery, possibly from humidity, but when I checked it there was no moisture and I put a new battery in and it worked for that evening. However, I came back and it was totally dead. Lesson to ALL: Make Sure You Check and Tighten the Cap Every Couple Weeks!!!
After warrantying this first pair, I was able to ride with a second. This pair lasted for about 2 weeks, max, before one of the tensioning springs just totally exploded. I don’t know the exact details but I think the spring itself hit something on the trail but I can’t be sure. I will expand on this in a moment.
After breaking the second pair, I brought in one of these pedals to the shop as I thought it might be fixable, but they didn’t know for sure so they just handed me a third pair. This pair did not even make it through one ride. However, how they broke was interesting. I know 100% that while the bottom of the pedal hit a root (on a climb so not THAT hard), the spring actually broke around my clete itself. I didn’t put that together at first but when I did I realized I had ended up unclipped while it bonked the root. This was not a hard impact, e.g. I didn’t pop out from that, so I suspect there was an issue with how something responds when actually clipped it. i wonder if this is what happened to my second pair but I can’t be sure.
All I can say is at least they got warrantied. But the pedals seemed like crap to me, and for $700 its way too much of a risk to hope that they’ll stay in one piece for a long time.
TLDR: Broke 3 pairs of rally XC100s. Cannot recommend anyone buy these, I suspect we’re all gonna start seeing a ton of warranty’s eventually. Probably fine for CX, as long you don’t whack stuff ever. Not something you can count on when you ride MTB’s all the time. The huge stack height doesn’t help things at all either.