Cone on crankarm?

Posted on Thu 12th, August 2010

• #1

Glenn

Not sure I'm using the right word, but I got a cone on the inside of the driveside crankarm (made for 2 chainrings (52&42)).

Does it have any use (running fixie with only the 42t chainring) exept it prevents me from using chainguard? I though I might just file it down.

So.... What is it and can safely I remove it?
• #2

highboy_coupe

Don't know if it has a name, sometimes it's on the chainring to stop the chain sliding down behind the crank arm if it comes off.
• #3

n3il

Yeah it can go.
• #4

Dutch_Cheese

The function is to prevent the chain from dropping between crank arm and outer chain ring in case the chain derails.
If you're riding a geared bike, it makes sense when you're riding on rough surface, have your deraileurs badly adjusted, or shift in a brutal way (or a combination).
For a single speed it doesn't make sense, as long as you keep your chain line and chain tension okay.
If it's in the way and prevents the use of a chain guard, just remove it. Doesn't harm.
• #5

Glenn

Yep, makes sense. Cheers!

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