aron 20 and 30 mph
About 45mph maybe 50mph for .21 engine
well it really depends on what type of motor you have, if you have a electric motor that is brushless than the fastest i heard of is about 160-180 km/h which is really fast and petrol engines is...
the moon buggy averages about 10 miles per hour
It's 2 speed so you're looking at 30mph+ Hopefully you will get in the 40-45 range with enough space and a good tune.