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that plastic disc ...
 

[Closed] that plastic disc behind the cassette...

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[#2176440]

what does it do exactly!?

Mine is currently jammed against the cassette and preventing the freewheel from.. er... freewheeling.

Is it like a bell and wheel reflectors... ie. destined for the bin?


 
Posted : 10/11/2010 4:25 pm
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stops your rear mech over shifting the chain into the wheel. But if your mech is set up proper then it wont do anyway


 
Posted : 10/11/2010 4:26 pm
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What he said ^ ^ ^

You can take the cassette off to remove it easily, or just smash it up and tear it out. Carefully.


 
Posted : 10/11/2010 4:31 pm
 s
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It has a gps data tag imbedded into the plastic, which sends you location to dog/stick owners who then can plot the best route to get in your way!


 
Posted : 10/11/2010 4:34 pm
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I hate to be a pedant about this, but it doesn't stop your mech overshifting.

It prevents the chain falling between the rear of the cassette and the spokes if your mech does over-shift.

As has been said, a properly adjusted mech shouldn't overshift in the first place.


 
Posted : 10/11/2010 4:38 pm
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Just search for "Pie Plate" on Google to view the shame you have bought on your family by not removing it immediately.


 
Posted : 10/11/2010 4:50 pm
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Put a reflective sticker on it and tell your mates it uses mystical energy to make your bike roll faster.


 
Posted : 10/11/2010 5:07 pm
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It indicates that you're not a real mountain biker, and all your friends will be s****ing and pointing behind your back 🙂


 
Posted : 10/11/2010 5:09 pm
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I've had some spokes a little cut up at the base when a chain once went over badly and jammed. It didn't affect the bike immediately but may have contributed to some later spoke breakages. I guess it protects from that if you have a crummy set-up.


 
Posted : 10/11/2010 5:18 pm
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Vanity and the knowledge I have a perfectly set up drivetrain means I never use the plastic spoke saver discs.
However, last season during a particularly gloopy cross race, my chain over shifted ripped through 3 spokes, gouged the hub flange, wrecked the rear mech and chain - about £100 damage - ouch!

I now run the rear wheel with, yes you guessed it No spoke protector!

Vanity rules. 🙂


 
Posted : 10/11/2010 5:23 pm
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Yes I used to mock people who didnt just KNOW you shouldnt have one on your bike.

Until

My rear mech took a knock on the way out to the Marmotte, I didnt check my gears and guess what I, I repeatedly lost my chain into the spokes, eventually jammed it right in, ripped off my rear mech getting it out! All in 30c heat half way up Glandon/Telegraph.

Cost me 1.5hrs and a whole world of panic/pain.

Hey you asked.

(You still have to take it off or people will call you a douche)


 
Posted : 10/11/2010 5:55 pm