Sitta Aluminium Rear Sprocket for Aprilia RS 660 (2020-2026) – 37-48 Teeth, 525 Pitch (202P)

Precision-machined from high-grade aluminium, the Sitta Aluminium rear sprocket is built to a standard that serious RS 660 riders will immediately recognise. Available in 37 to 48 teeth at 525 pitch, and finished in eight distinct anodised colours, this sprocket delivers a measurable reduction in unsprung mass alongside a surface treatment that goes well beyond what standard anodising can offer — making it a genuine performance and longevity upgrade for both road and track use on the Aprilia RS 660 (2020-2026).

Key Features

• Hard-anodised surface treatment provides significantly greater wear resistance and service life than conventional anodising, keeping the sprocket looking and performing at its best through extended use.
• Lightweight aluminium construction weighs approximately 350 g in size 45, directly reducing unsprung mass and contributing to sharper, more responsive handling.
• Wide tooth selection spanning 37 to 48 teeth on a 525 pitch gives you precise control over gearing — whether you want stronger acceleration for the track or a more relaxed top-gear pull for road touring.
• Compatible with both 520 and 525 chain versions, offering flexibility when paired with a chain conversion kit.
• 5-hole sprocket carrier mounting pattern (100/120-5 hole) ensures a straightforward, bolt-on installation with no modification required.
• Available in eight colours — silver, black, hard-anodised, red, gold, blue, orange and green — so the finish can be matched to any RS 660 livery.

Build Quality and Materials

The Sitta 202P rear sprocket is manufactured from aerospace-grade aluminium alloy and processed to tight tolerances throughout. The hard-anodising treatment applied as standard creates a surface layer that is considerably harder and denser than a conventional anodised finish, resisting wear from chain contact, road grit and the thermal cycles a motorcycle drivetrain generates in everyday use. The result is a sprocket that holds its tooth profile longer and resists corrosion far more effectively than budget alternatives — qualities you notice not just at purchase but over thousands of kilometres of use.

Performance and Gearing

Rear sprocket tooth count is one of the most cost-effective ways to tailor an RS 660's character. Moving to a higher tooth count shortens gearing, sharpening acceleration out of corners — a popular choice for circuit days where exit speed matters. Stepping down in teeth lengthens gearing, lowering engine revs at motorway speeds for a more comfortable touring setup. With twelve tooth options between 37 and 48, Sitta gives RS 660 owners the resolution to dial in exactly the right ratio for their riding style and preferred circuit or road profile.

Fitment and Compatibility

This sprocket is designed and confirmed to fit the Aprilia RS 660 across the full production run from 2020 to 2026. It is compatible with both 520 and 525 chain pitches. The 5-hole carrier interface (100/120-5 hole pattern) matches the RS 660's rear wheel hub directly. Always confirm chain pitch compatibility with your existing or replacement chain before ordering.

Specifications