XM540TF DIRECT Stock Spec *Turns: 8.5 *Design: Sensor-based *Motor Size: 540 Size: 52.8 x 36.0 mm *Input Voltage: 4-8 cells (1.2V/cell) or 2 cell Li-Po *Magnet: Sintered nickel-plated, Neodymium (one-piece, high-strength) *Motor Weight: 165 grams *Shaft Diameter: 0.125” (3.175mm) [accepts all existing pinion gears] *Bearing Size: MR104 (10 x 4mm) *Timing Ring: Darkgray *Protection: Thermal *Idle current@7.2V (A): 2.4 *Resistance(mOhm): 13.8 XM540TF-8.5D XM540TF-10.5D *Turns: 10.5 *Design: Sensor-based *Motor Size: 540 Size: 52.8 x 36.0 mm *Input Voltage: 4-8 cells (1.2V/cell) or 2 cell Li-Po *Magnet: Sintered nickel-plated, Neodymium (one-piece, high-strength) *Motor Weight: 165 grams *Shaft Diameter: 0.125” (3.175mm) [accepts all existing pinion gears] *Bearing Size: MR104 (10 x 4mm) *Timing Ring: Blue *Protection: Thermal *Idle current@7.2V (A): 1.6 *Resistance(mOhm): 20.6 *Turns: 13.5 *Design: Sensor-based *Motor Size: 540 Size: 52.8 x 36.0 mm *Input Voltage: 4-8 cells (1.2V/cell) or 2 cell Li-Po *Magnet: Sintered nickel-plated, Neodymium (one-piece, high-strength) *Motor Weight: 165 grams *Shaft Diameter: 0.125” (3.175mm) [accepts all existing pinion gears] *Bearing Size: MR104 (10 x 4mm) *Timing Ring: Orange *Protection: Thermal *Idle current@7.2V (A): 0.9 *Resistance(mOhm): 31 XM540TF-13.5D XM540TF-17.5D *Turns: 17.5 *Design: Sensor-based *Motor Size: 540 Size: 52.8 x 36.0 mm *Input Voltage: 4-8 cells (1.2V/cell) or 2 cell Li-Po *Magnet: Sintered nickel-plated, Neodymium (one-piece, high-strength) *Motor Weight: 165 grams *Shaft Diameter: 0.125” (3.175mm) [accepts all existing pinion gears] *Bearing Size: MR104 (10 x 4mm) *Timing Ring: Yellow *Protection: Thermal *Idle current@7.2V (A): 0.7 *Resistance(mOhm): 57 *Turns: 21.5 *Design: Sensor-based *Motor Size: 540 Size: 52.8 x 36.0 mm *Input Voltage: 4-8 cells (1.2V/cell) or 2 cell Li-Po *Magnet: Sintered nickel-plated, Neodymium (one-piece, high-strength) *Motor Weight: 165 grams *Shaft Diameter: 0.125” (3.175mm) [accepts all existing pinion gears] *Bearing Size: MR104 (10 x 4mm) *Timing Ring: Green *Protection: Thermal *Idle current@7.2V (A): 0.5 *Resistance(mOhm): 86 XM540TF-21.5D