[RyanCahoon]

As long as they are used under fairly light loads, these gearboxes work fine. Teams have had bad experiences with such small, yet high reduction, gearboxes under high torque stall circumstances in the past, so make sure this is not the case on your 'bot. Using them for rollers shouldn't be a problem.

However, note that clicking the "Add To Basket" leads to a page saying they are out of stock, so you might need a different solution.

--Ryan