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Old 01-13-18, 03:22 AM   #1
MarcusT
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Question about the Deore Hollowtech crankset.

Just installed the new crank and I am wondering if there is supposed to be a cap for the drive side axle? Is it just open like that where all the crud can accumulate? Do you put something to cover it?
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Old 01-13-18, 04:02 AM   #2
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Yes, it's supposed to be open. Mud and stuff can get inside without hurting anything since the walls of the spindle are solid. For a while there was a non drive side tension cap that also had a hole in it, so you could see all the way through.
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Old 01-13-18, 11:59 AM   #3
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there have been accessories made to use that tube interior space, like carrying tire patch kits..
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Old 01-13-18, 08:36 PM   #4
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It is hollow tech ; ) I wouldn't worry too much about it, if you do get something in there you can easily clean it out with a bottle scrubber (or a rag on a stick) or spray some water in and let it drain.
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Old 01-14-18, 01:05 AM   #5
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I can understand Shimano's marketing of something like a patch repair kit, but it just seems odd that they would not market a cap, even for a few bucks. Not, that I would buy it, just seems odd. Maybe I'll stick something like nitrile gloves or steel wool in there.
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Old 01-14-18, 05:09 AM   #6
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These universal caps are available in untold sizes and colours, in rubber, plastic, or metal, and prices start at half the cost of a newspaper. You can find them pretty much everywhere, inc. industrial supplies, car accessory stores, hardware stores, electrical retailers.. and of course ebay. You're welcome.

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