TETRIX All Terrain vs. Stealth Wheels vs. ???

[FRC Team CC]

Hey guys,

We had a question regarding wheels. Currently we are using the TETRIX All-Terrain Wheels (http://www.pitsco.com/TETRIX_All-Terrain_Tire), which seemed to work fine. They used climb the churros (at least up to the mid zone), but after some use, they seem to have trouble climbing the churros

Is it normal for these wheels to lose traction this quickly? If not, is there any way to increase traction? If so, how do these wheels compare to other wheels like the Andymark stealth wheels? Would you recommend the stealth wheels?

Thanks,
Charging Champions