I'm totally new to mountain biking, but I used to ride bmx for years. I am seriously considering a single speed bike that can be used as SS or geared. I'm currently looking at Niner SIR9 which uses their EBB2, but i have been reading on this forum about riders experiencing creaking or slipping of the EBB2 on the Niners. And riders have been saying its either hit or miss on this EBB2 setup and its a real hassle to mess with. I just want to ride and not worry about it. Not sure what to do, get the Niner SIR9 or go with another company? Anyone with a Niner have this issue on their 2014 model? If i don't go with the SIR9, what other frames should i be looking at? I really like the Canfield Nimble or the Salsa El Mariachi.