hi first of all pardone my spelling on my first bike i had a problem with the chane clearing the fat cruzer tire. so i got a 1/4 in thick pice of plexy glass layd my sproket on it used a 3 1/2 in hole saw a 3/4 in hole saw a 1/4 in drill bit to make a spacer fits grate now and dosent come luse alinining the sproket is allways a pain but just tighten in a star pattern a little at a time. a 5 gal bucket makes a grate working platform and a strate edge to lay across the tire to check the sproket for wobbel is helpfull.