REAR SPROCKET ALLOY RENTHAL 50T, 2025 GASGAS/HUSQVARNA/KTM, ULTRALITE 518U-420-50GPSI
4.1 Trustpilot 99.9% positive on eBay
UK delivery £4.99, free over £60 2–4 business days
Spread the cost with 18+, T&Cs apply
Renthal Ultralite 518U-420-50GPSI rear sprocket with 50 teeth, made from 7075 T6 aluminium. CNC machined in the UK with tight tolerances for accurate fitment and superior load dispersion. Features optimised tooth profiling for maximum power transfer. 66% lighter than steel sprockets, with hard wearing surface treatment for extended durability. Used by more factory race teams than any other aluminium sprocket brand.
- SKU
- SR518-50.REN
- Brand
- Renthal
- Availability
- In Stock (4)
- Variant Id
- 346820
FULL DESCRIPTION
Renthal Ultralite 518U Alloy Rear Sprocket - 50 Tooth
Upgrade your motorcycle's performance with the Renthal Ultralite 518U Alloy Rear Sprocket. This high-quality sprocket is precision CNC machined in Manchester, UK, from high-strength 7075 T6 aluminium. It offers a significant weight reduction of 66% compared to traditional steel sprockets, contributing to improved acceleration and handling.
Engineered with extremely tight tolerances, this sprocket ensures accurate fitment and concentricity. Its computer-aided design optimizes load dispersion and tooth profiling, maximizing power transfer from your engine to the rear wheel. The hard-wearing surface treatment is applied for extended durability, ensuring a long service life even under demanding conditions. This is the same type of aluminium sprocket trusted and used by more factory race teams than any other brand.
Key Features:
- Manufactured from high-strength 7075 T6 aluminium
- 66% lighter than equivalent steel sprockets
- CNC machined to extremely tight tolerances
- Computer-engineered for precise fitment and concentricity
- Designed for optimal load dispersion and power transfer
- Hard wearing surface treatment for extended durability
- The choice of leading factory race teams
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Call or email us with your make, model and year and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.