DingusMcGee
100 kW
gman1971
Dingus,
Wow.. didn't hold.... you say climbing hills? at what wattage? 100kW??
The roll pins held in torque shear but they do not have stops on them to keep the biggest chainring from moving sideways -- inward. And neither do the tight round pins that friction wise hold the things together. I did think there would be enough friction to hold things together with the 7 roll pins. But upon inspection after the hill workout the biggest charing had some space between it and it's clutcher cog. Roll pins do compress circumferentially unless a tight pin would be fitted to inside of them.
There is no clutcher cog to the inside of the biggest chainring. A clutcher cog to the inside of the biggest ring would take up valuable real estate for ever making a 9 speed cassette. Bolts bind things together which roll pins cannot do. The 4 chainring bolts are working fine. I just had to drill bigger holes in the 104mm BCD pattern.