The feeling between my Tamland and SuperX while climbing is noticeable. Whether the 6lbs difference is the reason, or the more aggressive geo, or whatever, is irrelevant to me. The SuperX is just more fun to ride. It's light and snappy and fun. It feels like a road bike with 40mm tires, and that makes this roadie happy.
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2014 Cannondale SuperSix EVO 2
2019 Salsa Warbird