520链条规格转换套件【前齿盘】
商品 # PC-PCYCO12
商品 # PC-PCYCO12
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适配车型链接
I bought this to convert the chain size of my SEROW250 from 428 to 520.
I wanted the secondary reduction ratio to be as close to the OEM 3.2 as possible, but I decided to go with the 12, which is almost the same size as the OEM, because the 11 would hit the chain slider harder and there would be fewer options for the rear sprocket.
For 12 guns, the OEM approximation is 3.17 for a 38 Rear Sprocket and 3.25 for a 39 Rear Sprocket reduction ratio.
I set the Rear Sprocket to 38, and the Chain Link number to 106, but the Chain Adjuster is at the back, near 13.
The length of the chain can be calculated by Pitch×LINK number, but it was easier to use DID's Chain link calculation table.
https://didmc.com/chain/chainlink/
I bought it in a longer LINK number just in case and Cut it.
I've only used it for about 10,000km now, so durability is still unknown, but it will probably outlive the Chain.View Detail
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