Sugino BB Help
01-29-14, 01:17 PM
#1
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Sugino BB Help
I'm getting ready to go from a Sugino XD triple to a double. I'm just loosing the granny gear. What size would you use for that crank? It's going on a steel frame bike if that makes any difference.
01-29-14, 01:21 PM
#2
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Are you just unbolting the granny chainring and keeping the rest of the triple crank or switching to a purpose built double crank completely? Suguino should recommend a suitable length bottom bracket for either.
01-29-14, 02:19 PM
#3
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All I have now is the crankset. There isn't a BB. All my JIS taper BB spindles are for vintage bikes. So, they're all around 122mm which is way too long.
01-29-14, 02:25 PM
#4
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Should be a simple Math and measuring ..
your new chainline is between the 2 chainrings rather than the center of the middle of 3.
your new chainline is between the 2 chainrings rather than the center of the middle of 3.
Last edited by fietsbob; 01-30-14 at 09:43 AM.
01-29-14, 11:05 PM
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For a double 107mm might work, depending on chainring size and dimple shape. 110mm will almost certainly work.
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01-30-14, 08:49 AM
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Any way to take it to a co-op or bike shop and try-fit a couple of different bb's to see what works?
01-30-14, 09:23 AM
#7
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01-30-14, 10:27 AM
#8
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Thread Starter
If I interpret you correctly, you currently have a Suguino triple crank and you are just going to unbolt the granny chainring. right? I wonder if the triple, even with the third ring removed, works with the same bb spindle as their purpose built double.
Any way to take it to a co-op or bike shop and try-fit a couple of different bb's to see what works?
Any way to take it to a co-op or bike shop and try-fit a couple of different bb's to see what works?
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