hamster huey
Well-Known Member
The Garmin Foretrex 101 is a highly accurate wrist strap GPS unit very useful in tuning and comparing hopups. The accuracy of the 101 has been proven with radar guns. I got mine new for $75 shipped on ebay. It can help with pipes, gears, tires, needle tuning, fuel blends, air filters, etc. On the side you can geo cache with it too (geocaching.com). Its amusing to see the total distance your rc car goes in miles and average speed. It is small enough to use even on 1/16 rcs too. I like to use it when testing different batteries in my electrics rcs.
