After doing some digging, I was able to find one option for a 3-bike trunk-mounted bike rack for your 2016 Lexus RC 300, from Yakima:
- Yakima FullBack 3-Bike Rack # Y02633
The FullBack will fit your Lexus, but it is also just a really nice rack with strong anti-sway cradles and ratcheting straps which secure your bikes at three different points; this ensures your bike won't swing while you are traveling, keeping it steady to protect the bike as well as your Lexus.
I do recommend adding... view full answer...