i looked at the mammoth also and i didn't like the looks of it. i don't race i just bash mainly in a dirt and gravel pit the mammoth would work well. but i still rather have the mammoth st. hobbytron has it on top of a revo that thing is huge. speaking of huge see that price tag. a little high for a 15 year old with no job. i can get the st for $350.00 now.