3Rensho XR-7000 Lo-Pro Pursuit Funny Bike

3Rensho XR-7000

After three years, I finally finished my restoration and build of this 53cm 3Rensho XR-7000 bike.  I acquired it from Japan as a frameset, and discovered it was made under license  by Yamakuni.  Check out this prior article for the history and background.  I had the fork re-chromed, but left the main triangle as-is.  I bought a barely-used Georgina Terry Despatch from 1988, and stripped it for the 6-speed Suntour Cyclone 7000 groupset and the 24″ front / 700c rear wheelset.  I’m aware the 3Rensho catalog showed it built with a Shimano 600 group, but they also sold it as a frameset.  Cyclone was Suntour’s second-best group in the same way that 600 was a notch below Dura Ace.

The rear Araya rim had a crack in it, so I re-laced the hub to a brand new Araya RC-540 rim.  The stem is a NITTO S65 Crystal Fellow with NITTO RB-021 bullhorn handlebars, matched to the NITTO S66 seat post.  The 3Rensho saddle finishes off the build in style.  Read on for more photos and ride report! 

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3Rensho Aluminum Bikes – Part Two: Yamakuni

Translation: “With a basic weight of 8.9kg, the 7000 series aluminum frame produces the lightness and stiffness required for racing.”

In the early 1990s, TIG-welding was rapidly eclipsing the “screwed and glued” method of aluminum bicycle frame construction. At the same time, aluminum frames were enjoying peak popularity among professional racers, being ridden to victories in the Tour de France and other major events.  This was the era of stiff, lightweight aluminum race bikes with extra-skinny tires, and 3Rensho was not going to be left behind.  Enter the Yamakuni 7000 bicycles, which would replace the SR Litage in the final years of 3Rensho.  Before we get there, let’s dig into a brief history of welded aluminum frames after the jump.

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