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Old 03-20-14, 08:02 PM   #1
mattkime 
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1981 Miyata 310 Bottom Bracket - what length??

The old bottom bracket looked waaaay too wide - like 1cm at least. I have a 103mm bb which fits the non drive side perfectly but the drive side needs more length - there 's a deeper recess for the bb spindle than on more modern cranks.

the crank says miyata as well.

anyway, i'd be impressed if anyone could dig up this bit of knowledge.
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Old 03-20-14, 09:15 PM   #2
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Even though the crankset may be pantographed Miyata, the back of it may have the manufacturer's ID. Once you figure that out, look here.

Sheldon Brown's Bottom Bracket Size Database
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Old 03-20-14, 09:41 PM   #3
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Maybe this would help, http://4.bp.blogspot.com/_whtVpXkKwl...600/img013.jpg

Catalog says should be SR crankset.
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Old 03-21-14, 04:55 AM   #4
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looks like its an SR SI-5DRG-AH
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Old 03-24-14, 05:57 PM   #5
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amazingly i found this - http://equusbicycle.com/bike/sakae/c...log18_%206.pdf
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Old 04-04-14, 07:35 AM   #6
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fwiw - i installed a 122mm bb and everything looks good so far. i'll report back with any updates.
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