Chain Question

POPO 749

Registered
Ok just got the 16/42 sprokets in will I need a new (longer) chain or will the stock one work? Or if I just change out the front can I run the stock chain ? Only about 2000 mile on the chain would hate to wait for replacement to come in.
 

SierraFlyer

Registered
Each tooth is equal to one link. So if you drop the front 1 and raise the back two you will need 1 more link (+2-1=+1), longer than stock to not shorten the wheel base (rear axle position). Half a link shorter in length will be the new axle position - wheel base - with a stock chain. That is about 3/8ths of an inch forward of where you have it now. Or add a link to the stock length and move the axle back 3/8ths inch or so. The axle position is half of the change in link length. I am guessing the link length is 3/4th inch? That is where I get the 3/8ths. It might be longer, more like 1 inch per link?
 

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