these wheels are so amazing, the amount of grip that they have on surfaces is amazing!!! great for pulling robots.

Very Good quality and excellent service.

Wheels have really excellent traction, they aren't heavy, and they look pretty cool :)

The sumo wheels of urethane have a great grip and with the weight of the sumo the wheels get crushed and that give to you more traction to your robot having a good motors and the correct weight you can have a very good traction.

Really good

Soft, gummy, and lightweight.

Note: These wheels will give you enough traction to make weaknesses in your drivetrain apparent! :)

I ran the Shore 45A version on a high torque 4WD beetleweight combat robot with almost 20 times its own weight in magnetic downforce. It was capable of pushing almost 100lbs on a steel table. The twisting force while steering was so high that it completely delaminated the urethane from the hubs, but the ribbed shape of the hub meant that the urethane stayed on and kept turning.

These wheels are battle tested. Some damage to the hubs but they still function perfectly. Taking direct hits from a horizontal, a drum bot, and being sent into the walls. These will be my go-to wheel going forward.