Thread: Bottom bracket and crankset
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Old 07-08-11 | 11:09 PM
  #6  
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LesterOfPuppets
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If by ENG you mean English threaded BB, that's a good thing. English threads only have to match up with the frame and all Treks have English Threaded bottom bracket shells.

ISO or JIS in this area concerns the taper on the BB spindle. AND you'll need to figure out if your BB spindle is 103mm.

Do you know the model and year of your Trek? Do you know the model of your BB? If not can you take good pics of your BB?
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