Originally Posted by
skater-deez1
I'd say check out the Speed Passion 17.5 combos,very affordable and really good performance. They're sensored and very smooth. As far as how to gear it,get the adaptor and a small spur/big pinion combo. You'll need to get somewhere around a 3.5- 3.8 fdr. To get your fdr it's spur divided by pinion times the internal(xxxs is 1.83 internal)ratio. Any questions feel free to ask away!
Thanks for the advice! I am finding several Speed Passion 17.5 combos on eBay, some with a 70 amp ESC, and some with the 40 amp ESC. Which ESC will I need for the XXX-S?