does higher gearing increase rpm or just the voltage?

[blueb8llz]

170 is still too hot? i thought as long as its not over 200 your ok. thats what i read in the faqs page. but some say 180 for motors is the max limit. so now im only at 170...is it because of the cheap feigao motors? i dont care about runtime loss. i just want more speed without having to buy another motor....just yet haha.
im looking to gain about 5-8mph which is why i want to gear higher than 24/68.
im thinking once i add my fan, i should be able to get lower temps, but ill see what temps i get with my 24/68 of course before i do any changes...but i guess right now, im thinking ahead and hoping for the best.