6K custom made drive rim made by 6K products in the USA.
DS0250 8 slot rim – will increase chain speed by approx 10%
DS0246 9 slot rim – will increase chain speed by approx 30%
DS0247 10 slot rim – will increase chain speed by approx 43%
Caution – do not look to swap rims unless you are an experienced lo pro ripping chain user. Using a larger rim may mean you have to increase the drive link count by a link.