Product Name: 6wd Wild Thumper Chassis Silver Body with 75: 1 Gearbox Model NO.: RS003S75 Color: Silver Style: Educational Toy Toy Department: Boys and Girls Material: metal Function: With Remote Control, Electric, Program Age: Above 14 Years Type: DIY Toys Weight: 3.7kg Gear Box: 75:1 Trademark: DAGU Transport Package: Color Box Specification: 440*295*195mm Origin: Cn HS Code: 90230090 Product Description 6WD Wild Thumper ChassisFour type for your choose:1.Silver body with 34:1 gearbox2. Silver body with 75:1 gearbox3. Black body with 34:1 gearbox4. Black body with 75:1 gearboxProduct parameters:1. Size: 425 * 300 * 120mm2.Chassis Universal plate (fixed plate) Aperture: 4MM3.Rated Voltage: DC 6V (minimum 2V maximum 7.5V)4.Maximum Stall Current 5.5A5.Each motor no-load current: 350mA6.Motor RPM: 10000 + / - 5%7.Output shaft speed: 295rpm + / - 5%8.Stall Torque: 4Kg/cm9.Bike Weight: 3.5KG10.Single motor torque: 12Kg · cm11.Rated voltage: 7.2V12.Maximum traction force: 28N13.Maximum Load: 6KG (75:1), 5KG (34:1)14. Gear box ration: 75:1 and 34:1 (two motor gear box ratio for selection)15.75:1 bodywork features: Slower, suitable for lawn, snow, mounds, stone ground, you can climb stairs, powerful, load slightly stronger.16.34:1 bodywork features: Flat (crushed gravel, cement, asphalt, dirt roads, beaches) moving fast, the load is poor, there is no large stones mound area, speed and power is also good.Note:More than 30CM height above the side of the fall, may be motor gear box cause permanent flawed.Wild Thumper:It should be noted that the Wild Thumper chassis's are high powered chassis's designed to work with popular 7.2V NiMh or 7.4V LiPo battery packs.The chassis comes pre-wired however power wiring between the battery and the controller should be automotive wire with at least a 20A rating.We do have a 6 DOF arm that suits the Wild Thumper chassis. The arm is also constructed from aluminium.This arm is sold speperately and is easily mounted on the top deck of the Wild Thumper.We have a new controller available now for controlling the Wild Thumper chassis called the T'REX robot controller.Instruction manual can be downloaded, the links is as below.https://drive.google.com/file/d/0B__O096vyVYqcnJfNllLbVc2bEE/edit?usp=sharingThe T'REX is more than just a high powered motor controller and switch mode power supply. It is an Arduino based robot controller.Using the supplied sample code the T'REX can automatically detect if an RC receiver or bluetooth module is connected.If no remote control method is detected then it defaults to I2C control intended for autonomous robots.