Singlespeed is a different riding style to geared - it's all about preserving speed, braking less, and working speed out of the bike with your arms/legs/core strength...I used to have a fully rigid surly1x1 and used it on local trails, with riders on geared/FS bikes. Some nights though we used to have SS only rides and enjoyed turning ourselves inside out on the steep stuff. I really really enjoyed riding it. I sold it to partly pay for my new road frame and while I miss it, I don't mtb enough to justify having another.