Review on BRIO World 33214 - Freight Battery Engine - Wooden Toy Train Set for Kids Age 3+, Green by John Miller

The drive wheels on this motor (and others I've purchased) have a rubber tread to create friction between the spinning wheels and the wood track. Children (and adults) are reluctant to manually shut off the engine when it is stuck, causing the drive wheels to spin and the wooden track to wear down the tread. With regular use, the profile wears out and the motor loses traction because it runs on the rim of the plastic tire. It turns out that the tread is on the edge of the rubber disc sandwiched between two plastic rims. This washer can be pulled out, BUT BRIO does not offer replacement parts or installation instructions. I think this is a serious disadvantage because these motors are expensive and without a profile on the wheels the motor is useless. Luckily, Revain accepted my return and replaced the motor. However, the defect remains unresolved. BRIO needs to fix this soon.