Drivetrain› Belt and Chain Drive

Alpha Racing

Rear Sprocket, 520 Pitch

$51.90

SKU: 2772B001A17+2771B001B45+520Z3D-120G+TB

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Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The Alpha Racing rear sprocket is a silver anodized aluminum sprocket designed for specific BMW motorcycles. It features a T45 size and a 520 pitch chain compatibility.
Show original supplier description
The Alpha Racing rear sprocket is constructed from silver anodized aluminum, offering a durable and lightweight upgrade for your motorcycle's drivetrain. It is designed with a T45 size and a 520 pitch, ensuring compatibility with specific chain types. This sprocket has an inner diameter of 119 mm and a bolt circle of 140 mm, with five holes measuring 12.5 mm each. This rear sprocket is specifically engineered for the BMW S 1000 RR models from 2019 onwards (K67) and the M 1000 RR models from 2021 onwards (K66). It is compatible with OEM forged or carbon wheels, including those with the M-package. The product's weight is 0.296 kg.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandAlpha Racing
Part Number2772B001A17+2771B001B45+520Z3D-120G+TB
CategoryDrivetrain
5,000+ Trusted brands
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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