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Discussion Starter · #1 ·
I'm putting together a 2010(?)FC. I'm assuming the the BB threading is 68 mm British threads. Can anyone confirm. I'm putting in a 6700 BB but it didn't screw right in like Shimanos usually do for me so I wanted to check before I do anything foolish. I didn't have enough light to check the
threads tonight and the old Felt website didn't specify.
 

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Discussion Starter · #4 ·
That was my assumption but I couldn't get the non-drive side threads(Ultegra BB) to start. It has an aluminum BB insert and the frame and has been sitting unbuilt for a while. I think there is some surface corrosion on the threads so I will find a local shop to clean the threads. First time I've had to use a shop in 15 years.
I've already used a a small wire brush and lube on the drive side but it was a no-go on the NDS.
 
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