The 1950 Imme R100 is a remarkable example of post-World War II motorcycle engineering and design. Manufactured by German engineer Norbert Riedel, the R100 was revolutionary for its innovative design, lightweight construction, and economical operation. It embodied simplicity and functionality while showcasing ingenious engineering solutions, making it one of the most distinctive motorcycles of its era.
Overview
- Manufacturer: Imme (developed by Norbert Riedel)
- Production Period: 1949–1951
- Type: Lightweight motorcycle for urban and rural transportation
- Significance: Known for its innovative single-sided front and rear suspension and modular simplicity.
Specifications
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Engine:
- Type: 99cc, air-cooled, single-cylinder, 2-stroke engine.
- Power Output: Approximately 4.5 horsepower at 5,600 rpm.
- Compression Ratio: 6.5:1.
- Fuel System: Single carburetor.
- Lubrication: Pre-mix oil and gasoline.
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Transmission:
- Type: 3-speed manual gearbox.
- Final Drive: Exposed chain.
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Chassis and Suspension:
- Frame: Tubular steel with a unique single-sided suspension system.
- Front Suspension: Single-sided leading link fork.
- Rear Suspension: A single-sided swingarm, with the exhaust pipe doubling as a structural member.
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Brakes:
- Front and Rear: Drum brakes.
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Weight: Approximately 57 kg (125 lbs), extremely light for a motorcycle.
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Top Speed: Around 45–50 mph (72–80 km/h).
Innovative Features
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Single-Sided Suspension:
- The Imme R100 featured single-sided front and rear suspension, reducing weight and complexity while maintaining ride comfort and stability.
- The rear swingarm design incorporated the exhaust pipe, serving dual purposes as a structural and functional component.
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Lightweight Design:
- The entire motorcycle was designed with minimalism in mind, using fewer parts without sacrificing structural integrity or functionality.
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Ease of Maintenance:
- Many components were modular and easily replaced or repaired, a practical feature for post-war customers with limited resources.
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Affordability:
- Designed to be affordable and economical to run, the Imme R100 targeted a market recovering from wartime economic hardship.
Historical Context
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Post-War Era:
The R100 was created in a time of economic austerity, when lightweight, efficient vehicles were in high demand across Europe. -
Norbert Riedel:
Riedel was an accomplished engineer who had previously developed starter engines for German military aircraft, bringing a wealth of technical expertise to the motorcycle’s design. -
Short Production Run:
Despite its ingenuity, the Imme R100 faced financial difficulties and competition from larger manufacturers, leading to the company's closure in 1951.
Legacy
- Innovative Engineering:
The Imme R100 is celebrated as a milestone in motorcycle engineering, demonstrating that simplicity and innovation can coexist. - Collector Appeal:
The rarity of the R100, combined with its unique design and historical significance, makes it highly sought after by vintage motorcycle enthusiasts. - Inspiration:
Its radical design has inspired subsequent generations of engineers and designers, showcasing the potential of lightweight and minimalist motorcycles.
Summary
The 1950 Imme R100 is a testament to ingenuity and practicality in the face of adversity. With its innovative suspension, lightweight construction, and streamlined design, it remains an iconic piece of motorcycle history. Its rarity and pioneering engineering continue to captivate collectors and enthusiasts worldwide.
You may purchase a print of the 1950 Imme R100 in our Riding Into History 2016 online gallery.
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