JT Sprockets - Front - 17T | RB | 520 (Steel)

Upgrade your Triumph’s drivetrain with the JT Sprockets 17T RB Front Sprocket (520 pitch)—a durable, high-performance replacement designed to handle everyday riding and spirited touring alike. Manufactured from C49 high-carbon steel and precision-machined for perfect alignment, this sprocket delivers smooth, consistent power transfer while enhancing drivetrain longevity.

Engineered to meet or exceed OEM specifications, this sprocket is an ideal option for riders looking to slightly lower their gearing for improved torque delivery.

Key Technical Features:

C49 High-Carbon Steel Construction
Offers exceptional strength, wear resistance, and long service life—built to withstand the demands of real-world riding.

17-Tooth Setup
One tooth down from stock (typically 18T on many models), this setup delivers quicker acceleration and increased low-end torque, ideal for urban riding or heavier payloads.

Precision Fit & OEM-Compatible
Machined to exact tolerances to ensure a secure, vibration-free fit with factory sprocket carriers and chains.

Direct OE Replacement
No need for modifications—fits stock 520-pitch chain systems found on select Triumph Modern Classic models.

Optimised Gear Ratio for Performance
Enhances throttle responsiveness while sacrificing a small amount of top-end speed, making it ideal for riders who prioritise low-speed control and torque.

Fitment:

✔ Bonneville T100 (900cc) incl. ABS — 2016–2021
✔ Street Twin (900cc) ABS — 2016–2021
✔ Street Cup (900cc) ABS — 2017–2019
✔ Street Scrambler (900cc) incl. ABS — 2017–2021

Important Note:

This 17T sprocket is designed for use with 520-pitch chains. If your motorcycle has been modified or you are unsure of your current chain size, refer to our Triumph Bonneville Motorcycle Chain Sizes Explained to confirm compatibility before installation.

Why Choose JT Sprockets?

JT Sprockets are trusted worldwide for their precision engineering and high-quality materials. Produced using advanced CNC technology and heat-treated for durability, JT offers consistent performance equal to—or exceeding—OEM components.

• ISO-certified manufacturing process

• Widely used by professional workshops

• Excellent value without compromising strength or fit

Whether you're adjusting gearing for improved throttle feel or replacing a worn front sprocket, JT's 17T RB front sprocket offers a smart, performance-focused upgrade for Triumph Modern Classic owners.