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Renthal Rear Sprocket 42T 525 Chain Aprilia 1998-2023 478U-525-42P-HA

Part Number: 12112717
RENTHAL
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SKU:
12112717
UPC:
765442113496
MPN:
478U-525-42P-HA
Availability:
Ships Same Business Day
Weight:
0.96 LBS
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$106.75
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Description

Reducing unsprung weight is one of the most effective ways to improve acceleration, handling response, and braking performance on your Aprilia. The Renthal 42T rear sprocket delivers a significant weight savings over stock steel alternatives—33% lighter—without sacrificing the durability required for aggressive riding. Combined with its CNC-machined precision and engineered tooth profile, this sprocket extends chain life, cuts drivetrain noise, and maximizes power transfer to the rear wheel.

Whether you're chasing lap times on track or tuning your street bike for better rideability, upgrading to a lightweight aluminum sprocket is one of the highest-value modifications available. This Renthal piece is engineered for direct fit on 525-chain equipped Aprilias from 1998 through 2023—a bolt-on upgrade that requires no fabrication or modification.

  • Tooth Count: 42T
  • Material: 7075-T6 aluminum
  • Weight: 0.96 lbs
  • Weight Advantage: 33% lighter than steel
  • Construction: CNC-machined
  • Chain Size: 525
  • Fitment: Aprilia 1998–2023 (RSV4, Tuono V4, Caponord 1200)
  • Part Number: 478U-525-42P-HA
  • Installation: Bolt-on
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Fitment for Renthal Rear Sprocket 42T 525 Chain Aprilia 1998-2023 478U-525-42P-HA

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