How to Compare Wheels for Combat Robots

In designing a combat robot, one of the most important aspects to consider is the type of wheels that you'll use. While cost is a factor, don't let that be the deciding factor in which wheels to use. Find a wheel type that fits with how you want the robot to perform.

Instructions

Difficulty: Moderately Challenging

1. Compare the weight. Use a lighter-weight wheel that makes it easier to quickly change speeds and reverse direction. Lighter wheels also allow you to use weight in more strategic parts of the robot.
2. Compare the diameter. Generally, smaller wheels give more pushing power and a slower top-end speed; larger wheels provide less pushing power but a faster top-end speed.
3. Compare the tread stiffness. Hard wheels wear longer than soft, cushy wheels. Softer tread provides a smoother ride, absorbs shocks better and helps with minor mounting flaws such as bent axles. Find the compromise that best fits your robot's needs.
4. Compare the core/hub. It's important that the hub be sturdy yet allow for easy machining if you have to change something. It should also have plenty of area for attaching to the driveshaft. Most hubs are either hard plastic or aluminum.
5. Compare the cost. There's always a trade-off between quality and cost. Remember to figure enough budget to have spare wheels on hand.

Tips & Warnings

• Budget permitting, experiment with wheels that have different sets of characteristics to find the optimal performance traits you're looking for.