What is a good wheelie bar for the caldera? Will it be necessary once I upgrade to a 2s Lipo battery?
I've never seen a commercial wheelie bar for the Caldera, but I don't think you'll need one. The Caldera has a low chassis compared to other trucks (i.e. Traxxas Slash or Stampede) so it wants to wheelie less. I'd try it without one... or maybe even buy a second front bumper (the extra loop that goes out front on the SC 10E) and put it on the back to drag.
What brand tires and rims will fit on it as I'm looking to upgrade them. I'm loving it so far but craving a little more speed. Any upgrades in addition to the wheelie bar I can put on for some increased stability/control? Thanks for any input.
For rims anything for a Stampede 4wd or Stampede 2wd fronts (not rears) would fit (they're all the same size). Those are all 2.8" rims and there are tons of tires for them
since Traxxas is sold everywhere. For example these are stock Stampede rims with ProLine Badlands tires on a Caldera SC 10E (thread here
Or, any 1/10th-scale Short Course rims and tires will also fit - all the tires are the same size (2.2" outside, 3.0" inside"). Rims for something like an HPI Blitz (rear) will make it a bit wider, for a Slash 4wd they're just about the same, and for something like an Associated SC10 2wd (rear) your Caldera will be a bit narrower: your choice! If you already have the SC 10E you'll notice regular SC tires are a bit shorter but the rims are the same (here's stock Associated SC10 2wd rubber on the left and Caldera SC 10Erubber on the right)
For more speed I'd check earlier in the thread. For about $5 you can try a pinion with an extra tooth or so, and if you're willing to spend a bit more there are several good motors and ESC's from HobbyKing or HobbyPartz (or go all the way and drop in a 1/8th-scale motor
). To begin with switch to lipo: once you've made that change you'll never want to run NiMH's again (again look earlier in the thead for some good batteries: I like HobbyKing Turnigy nano-techs)