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bridgestone diamond road headset

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bridgestone diamond road headset

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Old 07-15-07, 06:20 PM
  #1  
ernok1923
jon bon stovie
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Bikes: bridgestone 400 fixed gear conversion, dawes touring bike (model unknown)

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bridgestone diamond road headset

i recently found what appears to be a perfectly good bridgestone 400 frame and fork next to a dumpster. it looks like it could make a good conversion to a fixed gear.

anyway, i am curious about the headset. i found a 1985 bridgestone catalogue online which has the very same frame model. it says it has a 'diamond road' headset. i have found no information about this headset. wondering if it is worth saving or replacing. any thoughts? anyone know how to tighten it? or any other information about the bike? which bottom bracket does it have?

any info would be very helpful. thanks!
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Old 07-16-07, 05:08 AM
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T-Mar
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The 1985 Bridgestone 400 was an entry level, sport tourings model that sold for $249 US. The frame is an Ishiwata triple butted main triangle with hi-tensile forks and stays.

I'm not familiar with that particular headset but it sounds like it's a Bridgestone design and a holdover from the 1970s models. The bottom bracket should be 68mm but the there are too many possible variations on the required spindle length. Your best bet is to remove the crankarms and measure it, or remove the spindle itself and check the markings.
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