believe what you will, their plastic is also not particularly resistant to cold temperatures.
That's another point about plastic/aluminium parts, plastic parts tend to change properties in different heat. Plastic will become more brittle in cold weather and softer in warmer weather, alloy will not.
Budget monty: I have broken 2 of the RPM rear bearing carriers in the last 2 days. They fixed where the stock ones break by beefing it up there, but the RPM ones both broke right in the middle of the bearing area on mine. I already have the RPM arms and front Caster and steering blocks coming, but it looks like I need to get the aluminum rears. Anyone bend them, or are they pretty bulletproof? I am not a racer, I just need durability as I beat my truck hard.
Takedown and Brushlessboy both break RPM bumpers like they were made from chalk.