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Old 08-20-07, 09:14 AM   #1
staplemachine
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trek 1000 double crank

I just bought a bontrager(truvativ) 53/39 to put on my triple trek1000.I did not think about botom bracket width.Is this an issue? The Sheldon brown chart shows only one size square spindle for truvativ.
Thanks in advance.
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Old 08-20-07, 09:32 AM   #2
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You need a longer BB.
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Old 08-20-07, 09:37 AM   #3
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You need a longer BB.
Triple to double? BB will be shorter to move in the chainline.
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Old 08-20-07, 09:38 AM   #4
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For some reason I assumed I would need a shorter one as I am dropping one chainring
Im a little confused?
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Old 08-20-07, 10:08 AM   #5
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Triples need the longer BB axle, double need a shorter one. Now that's assuming you don't have outboard bearing cranks. What type of new crank DO you have? That will help in the discussion greatly.
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Old 08-20-07, 10:18 AM   #6
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The bike has a bontrager sport triple(trutaviv) And I bought the exact make in a double.
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Old 08-20-07, 10:26 AM   #7
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Shimano UN-53, 68x107.
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Old 08-20-07, 10:27 AM   #8
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Ops 1K pardons, you guys are correct. Now awake, dog ate my homework...
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