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Old 01-08-05, 11:57 AM
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Some minor corrections to bosco boy's post. The three models that used the same frame were the 3000, 5000 and 7000. Also, only the 3 main tubes are aluminum. The rear triangle is chromium-molybdenum steel. You can verify this with a magnet.

The frames are actually lugged. The lugs have 1.5" internal plugs that are thermally bonded to the main tubes. The outer surface of the lug is the same diameter as the aluminum tube and gives the impression of lugless construction. However, if you look closely, you may be able see mating line. Sometimes the paint did not hide it. Also, in the case of the seat lug, there is no internal plug for the seat tube, resulting in the seat tube being a smaller diameter than the lug. Traditional tube-in-lug construction was required in this location so that the seat tube could support the seat post for its entire insertion length. An internal 1.5" plug would have only provided only about 3" of support (1.5" of lug + 1/5" of plug), The only other option would have been a longer internal plug, which would have imposed a weight penalty.

The frames look remarkably like the Univega models that were being marketed at the same time. The seat lug and bolt-on stays are identical. It is common knowledge that many Univega were made by Miyata. However, in this case there is no resemblance to the aluminum models offered by Miyata. The other known supplier of Univega frames was Kuwahara and this may be the source used for the Mangusta.

Road tests of the day found the bicycles to be 'comfortable, stable, fun to ride'. FYI, the era for these bicycles was the late 1980s and the price for the Model 3000 was in $370-$400 US range, depending on the actual year.
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