Sitta Aluminium Rear Sprocket Triumph Street Triple 765 S / R / RS / Moto2 & Daytona 765 Moto2 (2017-2026) (201U) – 37-47 Teeth, 525 Pitch

Precision-machined from premium aluminium alloy, the Sitta 201U rear sprocket is built to meet the exacting demands of the Triumph Street Triple 765 and Daytona 765 Moto2 — whether you're chasing lap times on track or demanding uncompromising reliability on the road. With a verified weight of just 350 g at size 45, the 201U delivers a meaningful reduction in unsprung mass without any sacrifice in structural rigidity.

Key Features

• CNC-machined premium aluminium construction for maximum strength at minimum weight — only 350 g at size 45
• 525 pitch, compatible with the full Street Triple 765 and Daytona 765 Moto2 drivetrain specification (2017–2026)
• Available in 37 to 47 teeth for precise gearing adjustment to suit your riding style and circuit
• Sprocket carrier interface: 106/125 mm, 6-bolt pattern for accurate, rattle-free fitment
• Choice of eight finishes: silver, black, hard-anodised, red, gold, blue, orange and green — hard-anodised offers superior surface hardness and longevity over standard anodising
• Exceptional wear resistance under sustained high loads, whether street or track

Build Quality and Materials

The Sitta 201U is produced using aerospace-grade aluminium that strikes the ideal balance between rigidity and low mass. Every sprocket is CNC-machined to tight tolerances, ensuring tooth profile accuracy that translates directly into smooth, low-vibration power delivery and reduced chain wear. The hard-anodised finish option provides a surface that is significantly harder and more abrasion-resistant than conventional anodising, making it the preferred choice for riders who push hard over extended mileage. All other colour options are finished to the same high standard, offering a clean, uniform appearance that holds up to road grime and chain oil.

Gearing and Performance

Selecting the right tooth count is one of the most effective and cost-efficient ways to tune your Triumph's power delivery. The Sitta 201U covers a wide 37-to-47-tooth range, giving you meaningful gearing flexibility:

• Smaller sprockets (37–42 teeth): taller gearing, reduced engine rpm at cruising speed, higher top speed — ideal for motorway-heavy routes or fast circuits with long straights
• Larger sprockets (43–47 teeth): shorter gearing, sharper acceleration and more responsive throttle feel — suited to technical tracks, urban riding or riders who prefer a more aggressive power band

With eleven tooth options available, the 201U allows you to dial in exactly the characteristic you want from your Street Triple or Daytona 765 without changing any other drivetrain component.

Fitment and Compatibility

The Sitta 201U rear sprocket is engineered specifically for the following models. Compatibility is limited to 525 pitch chains only.

• Triumph Street Triple 765 S (2017–2026)
• Triumph Street Triple 765 R (2017–2026)
• Triumph Street Triple 765 RS (2017–2026)
• Triumph Street Triple 765 Moto2 (2017–2026)
• Triumph Daytona 765 Moto2 (2017–2026)

Sprocket carrier interface: 106/125 mm, 6-bolt. Please note: product images show sprockets that are visually similar to the 201U but may not depict this exact model.

Specifications