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Drivetrain› Belt and Chain Drive

Renthal

Ultralight Rear Chainwheel 48T

$104.95 $86.92 Save $18.03

SKU: R0A9 131U-520-48GBSI

In Stock
In Stock
Ships by Aug 30
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Overview

The Renthal 131U-520-48GBSI is an ultralight rear chainwheel designed for high-performance applications. It is CNC machined from 7075 T6 aluminum to extremely tight tolerances, making it 66% lighter than steel. This sprocket is computer engineered and tested to ensure precise fitment, concentricity, and load dispersion.
Show original supplier description
The Renthal 131U-520-48GBSI Ultralight Rear Chainwheel is engineered for demanding off-road and racing environments. Constructed from 7075 T6 aluminum with a 48-tooth count and 520 chain pitch, this sprocket offers significant weight savings, being 66% lighter than traditional steel sprockets. Each chainwheel is CNC machined to extremely tight tolerances, ensuring a precise fit, optimal concentricity, and even load dispersion. This advanced manufacturing process, combined with high-strength materials and durable surface treatments, contributes to the sprocket's exceptional performance and longevity. These ultralight rear sprockets are favored by many factory race teams due to their combination of reduced weight, high strength, and cutting-edge manufacturing. This specific model is designed for 89-01 Suzuki RM 80 and 2002 Yamaha YZ85 models.

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

BrandRenthal
Part NumberR0A9 131U-520-48GBSI
CategoryDrivetrain

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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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