SourceWith that disclaimer I will say that if the cable pull, ratios and cog spacing truly are matched, there won’t be an issue. The perfect example is cross compatibility between SRAM 10-speed mountain and road. These groups work together—period. Bicycle manufacturers, including Specialized, sell new bicycles with mixed groups like this. I fully encourage you to tinker and try different combinations with your new-found knowledge as you build your perfect steed.
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