Put any regular dirtbike on chassis dyno, with oring chain Measure power output Swap chain with xring or non oring, repeat I'd be surprised if one of the moto mags hadn't already done this Well, probably between unsealed and sealed I'd bet there isn't much difference powerwise between oring and any of the fancier variants of rubber seal So for bigger and more powerful bikes, non O Ring chains have been very much superseded by O Ring and X Ring chains These position a sealing ring between the inner and outer chain plates Before riveting in the factory, the internal parts of the chain are filled with chain grease by vacuum The sealing rings then have two purposes to keep theThis Premium #40 Oring roller chain is a great upgrade for your application Oring chain has been tested and results have shown that Oring chain can last up to 10 times longer than standard roller chain The Oring chain is named for the rubber Orings built into the space between the outside link plate and the inside roller link plates
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