The XTRM 2826/04 is a 1100 KV Brushless Outrunner with a current capacity of 55 amps @ 60 seconds. A maximum efficiency of 83%, a no load current @ 10vdc of 2.9 amps and an internal resistance of 28 Mohms. This outrunner has a 5mm shaft and is designed to run on 8-14 NiCad/NiMH cells or 3-5 LiPo cells. Includes Radial Mount, 5mm Collet type prop adapter and 3.5mm Gold Plated Bullet Connectors. This motor weighs 6.1 oz. and the dimensions are 35 x 50mm.