Question pertaining to replacing a cartridge-type bottom bracket. My cranks became a little wobbly so I figured that the bottom bracket needed servicing/replacing depending on which type I had. The bike is a Gary Fisher HooKooEKoo circa '91. After doing some reading about the kinds of bottom brackets that I might find upon pulling the crank arms, I was puzzled to find neither a standard-looking lockring for a serviceable BB, NOR a splined surface to use the cartridge bottom bracket tool on. It appears to have a C-shaped type of retaining ring with small holes(pin wrench fittings?) at both termini of the ring and I have no idea how to remove it in order to even find out what kind of BB it is. Any suggestions are appreciated.