42T 130BCD 5‑Bolt Chainring 77g, Compatible For All Bafang BBS‑Series Mid‑Drive Motor with 130BCD 5‑Arm Spider & All 130BCD 5‑Hole Bicycle Crank, Fit 7‑11 Speed Chain

✅ E‑bike：All Bafang BBS‑series mid‑drive motors equipped with 130BCD 5‑arm spider (BBS01, BBS02, BBS03, BBSHD)

✅ Bicycle：Universal fit all standard bicycles with 130BCD 5‑hole crank set

✅ Chain Compatibility: 7‑speed / 8‑speed / 9‑speed /10‑speed /11‑speed chains

✅ For mountain bike replacement, ebike rebuild, gear‑ratio tuning, repair‑shop spare‑parts stocking

✅ Broad Compatibility for Bafang BBS‑Series Mid‑Motors

This aftermarket‑compatible chainring fits any Bafang BBS‑series mid‑drive motor that uses 130BCD five‑arm spider, including BBS01, BBS02, BBS03, BBSHD and G320. No extra modification required if your motor spider is 130BCD 5‑arm standard.

✅ Dual‑Purpose Universal 130BCD 5‑Hole Design

Besides Bafang BBS ebike mid‑motors, also compatible with any regular bicycle crank with 130BCD 5‑hole mounting hole. One chainring serves both e‑bike and conventional bicycle projects.

✅ Wide Drivetrain Compatibility for Multi‑speed Systems

Precision‑machined tooth profile works seamlessly with 7‑8‑9‑10‑11‑speed chains. You can reuse your existing chain during replacement or upgrade.

✅ Light‑Weight Only 77g

Optimized cut‑out structure reduces rotating mass to only 77g, improves riding efficiency without sacrificing mechanical strength.

✅ Solid Steel Construction

High‑quality steel plate material, outstanding wear‑resistance and anti‑deformation performance. Delivers stable chain engagement and effectively reduces chain‑skip under high ebike torque and mountain‑biking load.

✅ Balanced Gear Ratio & Multiple Teeth Options

42T provides balanced torque and top‑speed for commuting and trail riding. Alternative tooth sizes:40T,44T,46T,48T,52T for different terrain and riding‑style requirements.

✅ Practical After‑Sales Replacement Spare

Direct bolt‑on installation. Great stock item for bike repair workshops and DIY bicycle & ebike enthusiasts.

⚠️ Pre‑purchase Check：Confirm your spider / crank is 130mm BCD 5‑Arm(5‑bolt). It will NOT fit motors or cranks with other BCD specifications such as 104BCD.

⚠️ This chainring works for BBS‑series motors only when motor spider is 130BCD five‑arm version. Some BBS stock spiders use 104BCD and are not compatible.

⚠️ Only chainring is included. Crank arm, mounting bolts and chain are NOT contained in package.

⚠️ Double‑check your whole drivetrain setup after installation.

⚠️ Product photos for reference only, actual product shall prevail.