Name: Proline Chainring - Ruphus | Track Bike | Round-Teeth Technology
Brand: Kappstein
SKU: 101303
Price: 129.0 EUR
Availability: InStock

Proline Chainring - Ruphus | Track Bike | Round-Teeth Technology

A gold and black Ruphus ProLine chainring for bicycles, showing the teeth and the hard-anodized surface.

€129,00

Tax included.

Pairs well with

In stock, ready to ship
Backordered, shipping soon

Product Introduction

The Kappstein Ruphus ProLine Chainring is a high-performance track and fixed gear chainring developed for riders seeking both precision drivetrain performance and refined design. As part of Kappstein’s ProLine series, it is optimized for 1/2" × 11/128" chains, delivering smooth and efficient power transmission across track, fixed gear, and singlespeed applications.

Designed in collaboration with Munich-based product designer Raphael Krome, the Ruphus ProLine combines advanced engineering with a distinctive visual identity. It reflects Kappstein’s approach of integrating mechanical performance with thoughtful industrial design.

Why This Chainring Is Different

• Optimized for smooth and efficient track drivetrain performance
• Precision CNC-machined construction for high stiffness and durability
• Hard-anodized surface for significantly increased wear resistance
• Designed for both competitive use and refined aesthetic integration

Technology Inside

This chainring incorporates key Kappstein drivetrain technologies:

• Round-Teeth Technology – improves chain engagement and reduces sliding friction
• ProLine Engagement Teething – optimized for professional track and fixed gear drivetrains
• Optimized structural design for high stiffness and long service life

Learn more:

• Round-Teeth Technology
• Our Technology

Real-World Performance

In high-performance and urban riding conditions, drivetrain consistency and durability are essential. The Ruphus ProLine chainring is engineered to deliver:

• Smooth and stable power transmission
• Reduced drivetrain friction and wear
• High durability under repeated load conditions
• Reliable chain retention across fixed gear and singlespeed setups
• Increased efficiency is subtly felt by the rider through a precisely tuned drivetrain

These characteristics make the Ruphus ProLine suitable for both competitive cycling and demanding everyday riding environments.

Applications

Ideal for:

• Track Cycling
• Fixed Gear Bikes
• Singlespeed Drivetrains
• Urban Performance Riding

Technical Specifications

Material: 7075-T6 Aluminum
Bolt Circle Diameter (BCD): 5 × 144 mm
Tooth Range: 47T, 49T – 52T
Chain Compatibility: 1/2" × 11/128" chains (Shimano · KMC · Connex)
Surface Treatment: Hard-Anodized
Color: Deep Black or Natural (slight variation possible)
Manufacturing: 100% CNC-Machined in Germany

Recommended Setup

For optimal drivetrain performance, the Ruphus ProLine chainring is designed to be used with:

• Kappstein ProLine track sprockets
• Shimano and KMC 1/2" × 11/128" chains

About Kappstein

Kappstein is a German engineering company specializing in high-efficiency bicycle drivetrain components. Through precision machining and applied mechanical research, the company develops chainrings, hubs, and drivetrain systems designed for maximum efficiency, durability, and smooth engagement behaviour.

Learn more about Kappstein and the company’s engineering philosophy.

Manufacturer:

Kappstein GmbH & Co. KG
Südstraße 15, Gebäude 14
99867 Gotha
Germany
Info@kappstein.de

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Who is Kappstein?

An innovative company from Gotha, Germany, specialized in the development of E-motors and premium bike components.

Testimonials

★★★★★
Kappstein's drivetrains take not only me personally but also my Superkool team to a completely new level. There's nothing faster when it comes to fixed gear racing.
Martin, Superkool Cycling Team
Germany

★★★★★
The ProLine sprocket impresses with
outstanding craftsmanship and durability, ensuring direct power transmission in
the drive. Highly recommended.
Suicycle Store GmbH
Hamburg Germany

★★★★★
Elite Chain ring and ProLine Sprockets are products that deliver a light and lively pedaling experience.
Euro Kim, LX Cycling Team
South Korea

★★★★★
As a bike courier, I don’t want to ride
anything else anymore. I’d say I’m usually a bit negligent with maintenance. However,
be it snow, mud, sand, salt—it’s still a smooth ride! In addition, it’s one of
the most beautiful chainrings on the market! I bought a new one a year ago, but
the old one still hasn’t worn out.
Tarik
Germany

★★★★★
Reliability I can always count on – Thank you, Kappstein!
For over five years, I’ve been riding on the track with chainrings and sprockets from Kappstein – and in all that time, there hasn’t been a single moment where I doubted my equipment. Especially on the track, where precision and reliability are crucial, that’s invaluable to me.
Sina Temmen
Germany

Proline Chainring - Ruphus | Track Bike | Round-Teeth Technology

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