Down The Trail: ProFlex 4000 - Mountain Bike Action Magazine
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Pro Flex 854 Mountain Bike s1994 lightweight 21-speed | eBay
Proflex/K2 Animal - Cola Town Bike Collective
Retrotastic! Why I've bought a 1996 Proflex mountain bike - YouTube
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Midlife Cycling: Pro-Flex Reflection
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1996 Proflex 856 World Cup... - Tyson's Bicycle Museum Page | Facebook