Exotek Flite 48P Machined Spur Gears are the perfect stock class solution when you want a precise, perfectly round and super lightweight spur gear. These gears are truer and much stiffer than a standard nylon spur gear and weight a mere 4.1 grams. Must use with Exotek Direct Spur Hub (AE - 1379, TLR - 1419, Kyosho - 1423, Yokomo - 1558), XRAY - 1582).