REAR SPROCKET JTR1857.45 STEEL SR1857-45
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
Rear sprocket JTR1857.45 made from C49 high-carbon steel for long wear. Precision manufacturing for exact OEM fit with a tooth count of 45 and 520 drive chain pitch. Black in color. Engineered for durability in street, track, and off-road use.
- SKU
- SR437-45.S.JT
- Brand
- JT
- Availability
- In Stock (1)
- General Product Group
- Chain & Sprockets
- General Product Type
- Sprockets & Components (Rear)
- Variant Id
- 278246
FULL DESCRIPTION
JT Steel Rear Sprocket - 45 Tooth
Crafted from premium C49 high-carbon steel, this JT Steel Rear Sprocket is engineered for superior durability and precision. It provides reliable power transfer and is designed to meet OEM standards for an exact fit.
Key Features:
- Constructed from C49 high-carbon steel for extended wear life.
- Precision manufactured to ensure an exact OEM fit.
- Delivers consistent power transfer with accurate sprocket tooth profiles.
- Engineered for robust performance in various riding conditions including street, track, and off-road environments.
Specifications:
- Material: C49 high-carbon steel
- Tooth Count: 45
- Drive Chain Pitch: 520
- Color: Black
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.