To be honest, I don't know activ3. I've read that some F80RL's were detuned 100mm forks, so I'm hoping to convert to 100mm once I can open it up and look inside. If I can't convert it to 100mm, I'm still going to use it. If I like the frame, I'll look for a new fork on down the road. The other thing is, that I may buy/build a new bike next year with my tax check. So I may sell this to help fund that bike at some point.