ha you'll have no problems with this hobby man you're asking all the right questions. I thought the stampede 4x4 would be a top heavy clunker too. But honestly I never really had a problem with roll overs. I attribute this to the low chassis design as well as the 4wd. This gives you a TON of gyroscopic control over the truck in a turn. It keeps itself upright and stable. All of this even before a anti-roll bar upgrade!
Volt Up. Gear Down.
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welcome to the site I think Traxxas is PERFECT for you and especially nerve because it is so tough that's why it is better than others