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| Zeile 156: |
Zeile 156: |
| * [[IRC]] | | * [[IRC]] |
| * [[Ishiwata]] | | * [[Ishiwata]] |
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| From a rec.bicycles.tech posting by Andrew Muzi:
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| I am intimately familiar with Ishiwata and its products, having been in the factory a few times, spec'd many bikes with their steel and built with it. I still use Ishiwata tube for frame repair.
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| The material [022] is virtually identical to Columbus SP/SL/SLX. The top range of tubes were seamless double-butted and the finish quality [as delivered to the builder] was much higher than Columbus. The tubing gauge of the 022 is 0.9/0.6 mm, exactly the same as Columbus SP. It's called "022" because the frame tube set weighs 2.2 kilos. The same material drawn thinner to 0.8/0.5 mm is called "019" because it weighs 1.9 kilos, just like Columbus SL. Many builders, then and now, mix gauges so a small frame might be all 019 but a 56 would have 022 chainstays and downtube for example.
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| Trek in the late '70s built three racing frames, one with Ishiwata, one Reynolds 531 and one Columbus. Geometry and weight were identical. The prices were unreasonably different because of the cachet of Italian tubing, making the Ishiwata frame the best value. Marketing took over later as the Ishiwata was dropped completely. With the advent of aluminum, the currency crash and the Japanese depression, Ishiwata closed the doors in the early '90s.
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| * [[Kashimax]] | | * [[Kashimax]] |
| Saddles | | Saddles |