I installed a 45t rear on a 4th gen using a 530 VM DID 114t chain, a 112t would not fit. I really like the over all feeling of more torque throughout the rev band. For stop and go city riding it's great, but comes with a little more revs/buzzing at 75 MPH. I replaced a 520 chain that was worn out, it takes some practice to get the shifting as smooth with the larger chain.
[image: Posted Image]
[image: Posted Image]