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Shimano 105 1050 hub VS Dura Ace 7400 FW

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Shimano 105 1050 hub VS Dura Ace 7400 FW

Old 02-14-20, 12:19 PM
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malcala622 
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Shimano 105 1050 hub VS Dura Ace 7400 FW

I have a NOS Shimano 105 1050 hubset and NOS Dura Ace 7400 freewheel. I tried test fitting the fw but it only threads in 1/4 of the way onto the hub. Am i missing something? I figured both must be English threaded. The Suntour fw I have smoothly threads in but not the Shimano.

Any help is appreciated.





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Old 02-14-20, 12:24 PM
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Would think both are English threaded unless otherwise noted. Are you sure threads are clean on the Dura Ace? Try some grease on threads, which is needed anyhow as you have Aluminum against Steel.

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Old 02-14-20, 12:57 PM
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Maybe you could try threading on a (BSA) bottom bracket lockring to confirm?
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Old 02-14-20, 01:08 PM
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It could be a slight burr on one of the threads. I would apply a light coating of grease on all the hub threads then gently thread the Dura Ace freewheel on by hand using the correct splined removal tool by hand to work it back and forth.

If the 7400 freewheel body has been exposed to any corrosion (which is entirely possible), I would take a clean shop cloth with some WD-40 on it and just work it back & forth on the freewheel body threads in order to remove some light corrosion or thickened old grease. Then re-try.
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Old 02-14-20, 05:45 PM
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Thanks everyone so far with replies.

On the DA FW I noticed a small section of a thread wasn't clean cut. Worst I can think is that it was installed, cross threaded and stored away. Luckily my LBS said they can repair it.
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