It's a bit cleverer than that. They are two tz85s linked so that they work as one big speed controller. If I remember correctly they're being rated at something like 150a, which like the tz85s won't be their literal constant current handling ability but they'd take that sort of figure for quite some time.

I believe Botbitz are building middleweights to test these speedos for Robogames/Combot Cup this year, so we'll know more soon.