Imme R100

Imme is the trade name of the German track motorcycle Type R 100, which was developed from 1947 by Norbert Riedel. The for that time futuristic motorcycle had some unusual design features. The name derives from the location of the production facility Immenstadt.


The engineer Norbert Riedel worked in the 1930s as a designer at Ardie, Victoria and Triumph in Nuremberg. He won the competition for the construction of a starter motor for aircraft turbine of the Messerschmitt Me 262 After the war he developed a motorcycle and built in Immenstadt a production plant on. In June 1949, the series production of the R Riedel began almost 100 The calculated price of 775 marks and high warranty costs led to financial difficulties. After comparing the autumn of 1950 the development work for the scooter Till were hired.

Developed by Riedel two-cylinder model, the R 150, could no longer be placed on the market for these reasons. In October 1951, the Riedel Motoren AG filed for bankruptcy.

Riedel R 100

Riedel used for his motorcycle in view of the shortage of materials after the war anfags only one pipe diameter. From this he made ​​the entire frame including the steering head and swingarm pivot, the one-armed Parallelogrammgabel - referred to in factory documents as " Halbparallelogramm - fork " - and the one-arm rear swing arm. This rocker was designed as a cantilever and Unit Swing and simultaneously exhaust pipe. To her suspension was a lying central spring that propped up the frame tube. The two bikes were identical and interchangeable. The Riedel R 100, the official designation, made ​​3.3 kW ( 4.5 hp) at 5800 rpm from 99 cc. The consumption of the originally " oxide red " painted available, 57 -pound machine was 2.3 liters per 100 km.

The special features of Imme was the twist shifter of the three- speed transmission, in which the position for first gear in the center was and at the same time was idle position; since the first course was also inserted at idle, but using a wire bar the clutch lever was permanently activated. A special feature of the engine - the one-sided crankshaft bearing - was abandoned with the appearance of the model "R 100 / D". The flat- piston two -stroke engine was designed to easily square with 52 mm bore and 47 mm stroke ( stroke ratio 0.904 ); the operation is specified as a steep power flushing with two windows. The drum brakes were designed as inner band brakes.

Riedel's attention to detail went so far that the battery was specially made for yourself: The case was triangular and the color oxide red.

By the time production ended in 1951 approximately 12,000 vehicles were built. To market the bankrupt ZMG motorcycle engines gearbox GmbH was founded in 1952, which took over the customer service, but also further operation; so a 125 - cc engine, and the two-cylinder engine was the "R 150 " was increased to 175 cc. In development was also a 200 engine. This deal ended in 1956.

Riedel's idea of ​​Unit Swing was picked up in some scooter models and among other things, in the mopeds NSU Quickly- T and Quickly- TT and in the Mokick Quickly- TTK. The one-armed or "half" front fork, however, found no imitators.


  • Imme - Friends: very detailed club website with test reports, brochures, technical documentation