Onza Dan and Dave, Onza Honch and Aggro. Both were combinations of front an rear specific threads designed to work in speciofic conditions. I never used the Dan/Dave combo but used a pair of Honch and Aggro as allround threads on my Pro-Flex, must be around 96 IIRC. Looked proper retro in amberwall with tall and chunky knobs.
I rode dunes with woods back then and they worked well in sand and relatively loose trails with a fair amount of forest hardpack thrown in. Not so good in mud as the closely packed tallish knobs up front clogged up quickly. Cornering knobs on the edges were quite soft and squirmy compared to the Geax tires I replaced them with. I'd not recommend them if you ride a lot of tarmac to gert to the trails.