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1997 Slingshot Cyclocross

This circa 1997 Slingshot cyclocross bike originates from the quirky design of Mark Groendal, who at one time found himself riding a bike with a broken downtube.  He noticed that the bike rode smoother over rough terrain, and developed the concept into a design that incorporated a cable in place of the downtube with a spring attached at one end.  A fiberglass board connects the toptube to the seattube, providing a vertical hinge with lateral rigidity.  Capitalizing on what some would call sling-power, the idea was to recover energy expended on the downward pedal stroke.  Within the regulated world of competitive cyclocross, the lack of a traditional downtube was a problem and the cable would be shrouded in a plastic tube.  This particular bike has a nice configuration, with horizontal dropouts, fender mounts, and a quick-release that allows the bike to fold for travel.

The Build

Year: 1997
Frame: Slingshot Cyclocross
Fork: Slingshot Cyclocross Unicrown
Stem: Control Tech
Headset: Dia Compe Aheadset
Bottom Bracket: Shimano Cartridge Bearing
Handlebar: Bontrager Race
Brake Levers: Dia Compe SS-7
Front Brake: Avid Tri-Align
Rear Brake: Avid Tri-Align
Crankset: Shimano Deore XT
Chainring: Ritchey 38T
Pedals: Shimano M525
Hubs: Spinergy
Rims: Spinergy Rev-X
Tires: IRC Crosscountry
Wheel QR: Control Tech
Seatpost: Control Tech SL
Saddle: Selle Italia Flite
Grips: ATI Neutron
Cog: Shimano DX 18T
Chain: Sachs PC41
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