1) I know nothing about your bike. 2) Most bikes with rigid forks should not be converted to suspension forks - they aren't designed for it. Only convert bikes with forks described as suspension-corrected. 3) Why do you want a suspension fork? Do you ride a lot of bumpy single-track? Maybe a bike designed for your use is a better solution. 4) As others have opined, a suspension stem may be an adequate solution. That's what I did with my MTB. I bought my mid-level MTB in 1988 just before the advent of suspension forks. Sure, the high-end MTBs at the time had them, but mid-line and lower-end bikes did not. I rode that bike for a long time. In fact, I still ride it. In 2005, I did an off-road triathlon on it. The bike leg took about 1 hour but the terrain was so bumpy and uneven that I could hardly hold onto the handlebars by the end of the ride. But I enjoyed that race so much that I thought about upgrading my bike. But I didn't want to upgrade by buying a new bike. I have 4 road bikes and probably do >90% of my riding on them. MTB for me is a diversion. So I researched susp. forks and came to the conclusion that they were not going to work for my bike. Somewhere in my research I stumbled on susp. stems. I ended up buying a used Softride suspension stem on eBay and I do not regret it.