Experimental testing of magnesium and chrome-molybdenum-alloy bicycle frames

Tests were made on a magnesium-alloy frame, as well as on bicycles made using such a frame. Strain gauges, a linear amplifier, an analog-to-digital converter, a microprocessor, a surface simulator and a personal computer were used to perform the measurements. It was found that the frame tested met the set of requirements laid down in the relevant standard concerning the static loads. The frame did not suffer permanent deformation. Making use of a field simulator; the elastic deformations obtained with different loads were compared on a bicycle assembled on an Mg (type: YBM-R-MTB, mass: 1245 gr., size: 19.5"/26") alloy frame. The low mass proved to be an added benefit. As far as the vibration tests are concerned, Mg frames performed well. The test results may make bicycle manufacturers reconsider constructional features and provide information for users in both competitive and mass sports