So...what the fuck. My front chainring is so god awful that I am now running a BMX chain. I went from a rohloff to the bmx....now- riding around it feels like I changed from 17 in the back to about 14t . It feels like the bike is 50 pounds and I am pedaling uphill all the time. I'm going to have to go to 18 or 19t in the back, its just way too hard. My question is why would this happen? Same gear, just a different chain... :?