Whipple's concern is in regards to their snouts. Given that a cog belt has dramatically less slip there testing and I quote from Mike himself 15 years ago was not good for longevity. Now again this testing was done 15 years ago... their policy is to not recommend a cog setup based on that data period. But since it is a concern for people rj mfg has is taking the time to design at least an 8 rib setup.
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