Amazingly the Profile Mid-BB's don't come with instructions.
I have some instructions specific to the Mid-BB's that I thought I e-mailed to the people who didn't get the instuctions in their Fall Guy box. The file is PDF, so if anyone wants one, e-mail me.
Basically, you should have recieved 2 types of spacers. One type are those supplied by Profile. These are 3mm wide, and have a rough finish because they are stamped. We put a few of those in the box. The other are 2 5mm spacers that you may or may not have to use. These are spacers we supply. Some longer cranks sit very closely to the Fall Guy Chainstays. These spacers go inbetween the crank arm and the sprocket to enable you to maintain chainline and space the crank out a little. That said, I ride 175 Profiles and an Imperial sprocket, and I don't use any spacers at all. Your sprocket should be against the narrower cone spacer supplied with the bikes. This arrangment results in the proper BMX chainline which off the top of my head is 41mm. If you are running a thin sprocket (like Ti), and longer cranks you may want to/need to run the 5mm spacers we supply. If anyone doesn't understand this arrangement, please e-mail me. The Fall Guy uses 1" tubing for the chainstays and is therefore tight for crank arm clearance. However, using the spacers we supply, you shouldn't have to compromise your chainline to achieve crank arm clearance, no matter what crank you choose to run.
Also, I really don't understand why evil4bc mentioned that 175's "aren't good for mountain bikes?" That makes no sense to me. It's like handle bar width. I've tried narrower bars, and they just don't feel very good to me; but so what? Short cranks are the same; just don't feel right to me. I ride 175 cranks and 28" bars , but I'm not going to imagine it's everyone's perfect set-up. In fact if I changed anything about my bike, it would probably be switching to 180s...
Anyway, Scurban mentioned he was looking at a Heckler. I think they are excellent bikes. I've had one for 3 years. Because of my injury, I've been riding a lot of XC recently, which includes dorking around on some of the free-ride stuff on the way down. The Heckler seems like the perfect bike for this.
I have some instructions specific to the Mid-BB's that I thought I e-mailed to the people who didn't get the instuctions in their Fall Guy box. The file is PDF, so if anyone wants one, e-mail me.
Basically, you should have recieved 2 types of spacers. One type are those supplied by Profile. These are 3mm wide, and have a rough finish because they are stamped. We put a few of those in the box. The other are 2 5mm spacers that you may or may not have to use. These are spacers we supply. Some longer cranks sit very closely to the Fall Guy Chainstays. These spacers go inbetween the crank arm and the sprocket to enable you to maintain chainline and space the crank out a little. That said, I ride 175 Profiles and an Imperial sprocket, and I don't use any spacers at all. Your sprocket should be against the narrower cone spacer supplied with the bikes. This arrangment results in the proper BMX chainline which off the top of my head is 41mm. If you are running a thin sprocket (like Ti), and longer cranks you may want to/need to run the 5mm spacers we supply. If anyone doesn't understand this arrangement, please e-mail me. The Fall Guy uses 1" tubing for the chainstays and is therefore tight for crank arm clearance. However, using the spacers we supply, you shouldn't have to compromise your chainline to achieve crank arm clearance, no matter what crank you choose to run.
Also, I really don't understand why evil4bc mentioned that 175's "aren't good for mountain bikes?" That makes no sense to me. It's like handle bar width. I've tried narrower bars, and they just don't feel very good to me; but so what? Short cranks are the same; just don't feel right to me. I ride 175 cranks and 28" bars , but I'm not going to imagine it's everyone's perfect set-up. In fact if I changed anything about my bike, it would probably be switching to 180s...
Anyway, Scurban mentioned he was looking at a Heckler. I think they are excellent bikes. I've had one for 3 years. Because of my injury, I've been riding a lot of XC recently, which includes dorking around on some of the free-ride stuff on the way down. The Heckler seems like the perfect bike for this.