Rear 7-speed freewheel cog with a plastic chain gaurd wanted.
06-25-14, 05:39 PM
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Rear 7-speed freewheel cog with a plastic chain gaurd wanted.
I want to get this 7-speed 14-34t cog.
https://https://www.amazon.com/Sunrace-7-Speed-Freewheel-14-34-Silver/dp/B002I7IC26
Is there a plastic protector for these that prevents the chain from damaging the spokes? My old one had one but I don't see one in this pic. They seem like a good idea.
https://https://www.amazon.com/Sunrace-7-Speed-Freewheel-14-34-Silver/dp/B002I7IC26
Is there a plastic protector for these that prevents the chain from damaging the spokes? My old one had one but I don't see one in this pic. They seem like a good idea.
06-25-14, 05:50 PM
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I believe you are referring to a "pie plate". As you might guess from this somewhat derogatory term they are not at all necessary but installed on some bikes to protect people from themselves. Rear derailleurs have two limit screws to limit their movement to not go beyond the center of the top and bottom cogs. As long as the upper limit screw is set correctly, the derailleur shouldn't get anywhere near the spokes.
06-25-14, 06:08 PM
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"As long as the upper limit screw is set correctly,..." and the derailleur has not subsequently gotten pushed inwards, perhaps while in a rack and unknown to the rider.
I put spoke protectors AKA "dork disks" on my bikes and have been glad that I have done so. I use an N-Gear Jump Stop up front too. Prying a greasy chain out of your spokes/crank sucks.
You need to count the spokes on your rear wheel and order the appropriate one.
I put spoke protectors AKA "dork disks" on my bikes and have been glad that I have done so. I use an N-Gear Jump Stop up front too. Prying a greasy chain out of your spokes/crank sucks.
You need to count the spokes on your rear wheel and order the appropriate one.
06-25-14, 06:11 PM
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On the other hand, your derailleur can be adjusted perfectly, but go into the spokes if it gets damaged. Say you whack it on a curb or rock or something and don't realize it....
On my and my family's bikes, I leave them on if they come with them, but mostly don't bother to replace them when they eventually fall apart.
EDIT: I see that ds was quicker on the draw than I was.
Also, be aware that they are also sized by the number of teeth in the inside cassette gear. The guard needs to have a greater diameter than that.
On my and my family's bikes, I leave them on if they come with them, but mostly don't bother to replace them when they eventually fall apart.
EDIT: I see that ds was quicker on the draw than I was.
Also, be aware that they are also sized by the number of teeth in the inside cassette gear. The guard needs to have a greater diameter than that.
Last edited by Spld cyclist; 06-25-14 at 06:15 PM.
06-25-14, 06:29 PM
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You don't see a spoke protector (sometimes derogatively called a "pie plate" or "dork disk") in the pic because you'd need to buy it as a separate item. Or if your bike already has one, just keep using it if it's big enough for that 34-tooth cog.
06-25-14, 06:34 PM
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The answer for your question is that the plastic plate is separate from the freewheel/cassette and you just use your old one when you replace the gear cluster.
06-25-14, 07:04 PM
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Haha, 'Dork Disc', I see it has my name on it. At least they look ok on my bike. I'm going to find one then. Thanks for the replies. Hope it impresses the ladies.
06-25-14, 07:43 PM
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This looks like it will work with my 14-34t cog. Only $3.99 with free shipping.
Amazon.com : Sunlite 7" Spoke Protector - Standard Plastic : Bike Wheel Accessories : Sports & Outdoors
Amazon.com : Sunlite 7" Spoke Protector - Standard Plastic : Bike Wheel Accessories : Sports & Outdoors
06-26-14, 04:46 AM
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That unit should work OK as it does not appear to be mounted to the spokes. Others, such as the Shimano ones, mount between adjacent spokes and have either 3 or 4 prongs so must be matched to the spoke count.
06-26-14, 05:52 AM
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Lower Limit (L) Screw for inward travel. Upper Limit (H) for outward travel.
