I'm guess mid/late 90's. I don't see any of the earlier Nukeproof radioactive logos like they use in the mid 90's. I had a set of early Nukeproof MTB hubs just recently and was running new Sram X9 10 speed on them. Sold them and bought a set of new Mavic Crossride wheels. Also had a set of the early BMX hubs also on my old Kastan BMX cruiser back in the 90's. All that Nukeproof stuff was the cat's meow. I know some of the frames has a really strange proprietary headset/fork setup. Their still around and based out of the UK but deal with mainly just downhill mtb stuff now. There early carbon parts like bars and hubs were just aluminum with a carbon skin over it and very rough to the touch. Still very cool stuff and still very desireable to collectors.

I think it would make a cool lightweight dropbar mtb project.