Challenger is not listed but fits perfectly. I originally had an Indian pinnacle heel shifter and hated it. Indian chose to mimic the Harley shifter instead of the excellent Victory heel shifter. This Kuryakn derailleur works the same as the Victory heel derailleur in that it doesn't touch your ankle and allows you to use the entire footboard. You can adjust the height to your liking, so you only have to lift your heel slightly to touch the shift pin, unlike the Pinnacle shifter where you have to lift your entire foot to put your heel on the pin. You must provide your own binding, but any of the default Indian bindings will work fine. Short pins work best. Too bad I didn't know about this switch before spending $150 on the "official" Indian Pinnacle switch. Lesson learned.
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