Fairly new to disk brakes. Had a pair Hayes 8". Just took my brand new bike out for its first ride. It has Juicy 3 6". Tried them at LBS and they had no braking power and hoped it would get alot better after they set in. Rode it down a long long steep street riding the brakes. Braking power got a lot better. But i am still not happy. On the trail today i couldn't even lock up the front. Is this because it is cold outside(right at freezing) or do i just need better brakes like an 8" and maybe a few steps up in the Juicy line. My Hayes 8' had enough power but i never rode it in the cold. Oh ya, i am a Clyde.