Zipper’s - Chain Conversion Kit with O-Ring Chain for 2018 & Up M8 Softail Models W/ 180 Rear Tire

Zipper’s - Chain Conversion Kit with O-Ring Chain for 2018 & Up M8 Softail Models W/ 180 Rear Tire

Zipper’s makes it easy to convert your M8 Softail from belt to chain with this all-in-one performance kit built for strength, durability, and street-ready torque. Whether you're upgrading for aggressive riding or just want the reliability of chain drive, this kit delivers.

It includes a Gold RK Pro O-Ring chain made for long-lasting street use, along with a 24-tooth front sprocket, a 51-tooth gloss black powdercoated dished rear sprocket with spacer, and ARP-grade sprocket hardware to keep everything locked in tight. Photo is for reference only.

Sprockets:

Rear Sprocket (Zipper’s 51T – Dished)

• Made from 1/4" thick hardened steel
• Dished profile to match M8 Softail alignment
• Gloss black powdercoated finish for added protection and clean aesthetics

Front Sprocket (PBI 24T)

• CNC-machined from 8620 nickel chromoly steel
• Case-hardened and electroless nickel plated for corrosion resistance and wear protection
• Made in the USA

Final Drive Ratio:

• Stock M8 Softail ratio (32T front / 66T rear pulley): 2.06:1
• This chain kit (24T front / 51T rear): 2.12:1

What to Expect:

• Stronger acceleration and improved throttle response
• Slightly higher RPMs at highway speeds — still very streetable
• A solid performance upgrade for riders who want more torque and the serviceability of a chain setup

Fitment — 2018 & Later Models with 180mm Rear Tire:

• Street Bob 107 / 114
• Low Rider S
• Low Rider ST
• Heritage Classic 107 / 114
• Softail Standard
• Fat Bob 107 / 114

Note: Does not fit Softail Fat Boy or Breakout Models.