Now that I did some research apparently 2x spacers on the drive side and 1x spacer on the non-drive side seem standard for certain crankset setups. Anyways, I think the crankset looks pretty good. Lifting the bike it feels noticeably lighter. Plus the Ultegra SM-BBR60 threaded bottom bracket is only about 76g. I guess I'll ignore the minor ramping pin chain rub in the small/small combo, I rarely ever use that gearing anyways. I'm on the fence if I want to get this crankset for my 2x gravel bike though. That bike sees significant abuse when gravel riding and going fast isn't much a priority. I still need to test out the bike on a real ride.
FYI: Apparently these carbon cranksets will go on sale tomorrow. I'll definitely order another set!
https://www.aliexpress.us/item/3256804855321533.html?
Well I'm going to have to reverse my decision on this crankset.
The drive side crank works fine, but the big problem is the 2 bolt clamping setup on the non-drive side crank arm. The design is way too fragile. Even with a low torque setting, I ended up cracking the non-drive side crank arm. This type of design is fine with alloy cranks like Shimano, but I think it would have been better to use some sort of center bolt locking setup that doesn't apply force to the carbon left crank arm.
I contacted the seller and they said they're already on vacation for the Chinese New Year until Jan. 28th, but I checked and the holiday doesn't officially start until the 21st!
https://www.chinahighlights.com/festivals/china-public-holiday.htmI ended up submitting a return & refund request under the 15 day no questions asked return warranty. Though a work around would be to use a Shimano style non-drive side alloy crank arm and the weight difference between arms is probably less than 50g, but with a more stable clamping area.