CeramicSpeed OSPW RS 5-Spoke Pulley Wheel for Shimano 9250/8150

Low-Friction Ceramic Bearings with Reinforced Cage

Oversized Pulley Design
CeramicSpeed Bearings
Reinforced Cage Construction

₹51,750

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The CeramicSpeed OSPW RS 5-Spoke Pulley Wheel System is an oversized rear derailleur cage upgrade designed for Shimano Dura-Ace and Ultegra Di2 road drivetrains. Developed for road cycling and triathlon, it combines low-friction ceramic bearings, aluminium pulley wheels and a reinforced cage to improve drivetrain efficiency while maintaining reliable shifting performance.

Efficient Drivetrain. The oversized pulley arrangement reduces chain articulation around the derailleur, helping minimise drivetrain friction. Hand-built CeramicSpeed bearings support smooth pulley rotation, while the aluminium pulleys feature an open-spoke design that complements modern road groupsets.

Reinforced Construction. The OSPW RS features a redesigned, angular cage engineered for improved strength and durability. Adjustable spring tension settings allow the system to be configured for the drivetrain, while its frame-specific mounting design ensures compatibility with the intended Shimano rear derailleurs. The complete system replaces the original derailleur cage and pulley assembly.

Specifications

Model	OSPW RS 5-Spoke
Product Type	Oversized Pulley Wheel System
Recommended Use	Road Cycling and Triathlon
Compatible Derailleurs	Shimano Dura-Ace RD-R9250 Di2, Ultegra RD-R8150 Di2
Drivetrain Compatibility	Shimano 12-Speed
Pulley Design	5-Spoke
Pulley Material	Aluminium

Upper Pulley	13 Teeth
Lower Pulley	19 Teeth
Bearing Type	CeramicSpeed Ceramic Bearings
Cage Material	Carbon Fibre-Reinforced Polyamide
Spring Tension	Adjustable
Color	Black
Weight	85 g

Features

Oversized Pulley Design: Reduces chain articulation to help minimise drivetrain friction.
CeramicSpeed Bearings: Hand-built ceramic bearings support smooth, efficient pulley rotation.
Reinforced Cage Construction: Updated cage architecture improves structural strength and durability.
Adjustable Spring Tension: Allows spring tension to be configured for the drivetrain setup.
Five-Spoke Aluminium Pulleys: Combine durable construction with a distinctive open-spoke design.

Warranty and support

Covered by the manufacturer's warranty. Warranty claims go through us and we deal with the brand for you.

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Shipping and returns

We ship across India. Shipping is free on orders above ₹2,000 and ₹99 below that. Cash on delivery is available on orders up to ₹20,000, with a COD charge that depends on the order value. For a delivery estimate, enter your pincode in the box above the add-to-cart button: it shows the courier's own estimate for your address, not a promised date. If a parcel is held up we chase the courier until it is delivered. Full shipping policy

Returns can be started within 7 days of delivery on unused items in their original condition with all tags and packaging. Apparel, helmets, gloves and similar items are returnable; wetsuits and products discounted by more than 5% are not. Compatibility questions are not grounds for a return unless our listing was wrong, so ask us before you order if you are unsure. Return shipping is arranged by you; on an accepted return you can choose an exchange, store credit or a refund after shipping and transaction charges. Orders can be cancelled only until they are processed. Full return and refund policy