Quick Answer: Zunow KYGM Randonneur
The Zunow KYGM is a rare early-1970s full-custom randonneur frame built by Takeru Kageyama — the founder of Zunow Cycles — in the French constructeur tradition. It uses Nervex lugs, 650B wheels, and pantographed Zunow components throughout. Only a handful of these bespoke frames are known to exist outside Japan, placing the Zunow KYGM among the most collectible examples of early Japanese custom framebuilding.
The Zunow name is most associated with the Z-1
Hummingbird road bikes and track frames that defined the brand’s commercial peak. But before those bikes existed, Kageyama-san was executing something more demanding: full-custom randonneur work built squarely in the French constructeur tradition. The Zunow KYGM is a product of that early period — a purpose-built touring machine and one of the most refined examples of his pre-production craft.
Frame and Origins
The Zunow KYGM dates from the early 1970s, built when Kageyama was taking individual full-custom orders rather than running production lines. The frame uses Nervex lugs — a French lug set favored by constructeurs for their long points and cleanly filed transitions — and is designed around 650B wheels, the standard diameter for classic French randonneur bicycles. This is not a road frame adapted for touring duty. The Zunow KYGM was engineered from the ground up for long-distance loaded riding, with geometry that prioritizes stability under a front bag.
This particular example was sourced via Yahoo Japan Auctions in 2020 — still the most reliable market for locating pre-production-era Zunow customs — and professionally repainted in 2024 in dark blue sparkle with yellow accents before a full component rebuild.
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Components: Pantographed Details and Campagnolo Mix
The Zunow KYGM carries frame-matched pantographed parts that mark it as a genuine full-custom build: the seatpost, headset, and bottom bracket all bear Kageyama’s Zunow stamp. The crankset is a Sugino Pro Dynamic S — original to the frame — updated with modern SunXCD chainrings for compatibility with the current drivetrain without altering the visual character of the build.
The drivetrain mixes Campagnolo generations with intent: a 9-speed Racing T rear derailleur, Chorus Ergoshifters, Athena hubs, and a Centaur front derailleur. Cross-generation Campagnolo compatibility is well established in practice, and this combination delivers reliable shifting on a bike designed for loaded touring miles. The 650B wheelset pairs Soma Weymouth rims with the Athena hubs, shod with Grand Bois Hetre tires — a 42mm folding clincher that remains the benchmark for 650B randonneur use.
📌 Coach’s Pick — Chain Lube: A touring bike doing wet-road miles under full fenders needs a lube that runs clean between long service intervals. Muc-Off Bio Dry Bike Chain Lube — zero black buildup on the drivetrain, holds up in mixed conditions, and won’t attract grit into your chain on gravel sections. →Muc-Off Bio Dry Bike Chain Lube
Brakes, Fenders, and Frame Details
The braking system uses Grand Bois cantilever brakes — originally sold by Velo-Orange as the MK3 Grand Cru cantilever in 2012 and no longer in production. Brake response is refined with Yokozuna compression-less brake housing and Kool-Stop brake pads, a pairing that delivers consistent lever feel regardless of cable run length — a meaningful detail on a fully fendered setup with longer housing runs.
The fenders are Lefol “le martele” hammered mudguards, a French-made set with a design history dating to 1938. The No. 17 plate-forme raised section on the rear fender is a period-correct detail that modern fender manufacturers rarely replicate.
Cockpit and Lighting
The stem is a Nitto Tallux with a 225mm quill — a longer-than-standard option chosen for a more upright randonneur riding position. Handlebars are Nitto B135 Grand Raundoner bars wrapped in Handlebar leather tape, finished with hemp twine. Saddle is a Brooks C17. The front bag is a Gilles Berthoud handlebar bag mounted to a stainless low-rider rack.
Lighting is handled by Kylie’s LM-018 USB-rechargeable bullet headlight — the only rechargeable bullet-style headlight currently on the market — with a LM-017 rear light on the seat stay.
The Zunow KYGM represents Kageyama’s early edge: a full-custom touring frame built in the French tradition by a Japanese framebuilder who had not yet scaled for volume. Among significant Zunow builds, it stands apart.
Frequently Asked Questions
What makes the Zunow KYGM different from other Zunow models? The Zunow KYGM is a full-custom randonneur frame from the early 1970s, predating the Hummingbird-series road and track bikes that made the brand widely known. Unlike production Zunow models, the KYGM was built to individual specification in the French constructeur tradition, with Nervex lugs, 650B wheels, and pantographed Zunow components throughout. Only a small number are known to exist outside Japan.
What is 650B and why did Kageyama use it on the Zunow KYGM? 650B is a wheel diameter that was standard for classic French randonneur and touring bicycles, sitting between the smaller 26-inch and larger 700C sizes. French constructeurs favored it for the combination of tire volume, rolling efficiency, and fender clearance it provides on a loaded touring bike. Kageyama used 650B on the Zunow KYGM to remain true to the French randonneur tradition the frame was built in.
Where can I find a Zunow KYGM for sale? Yahoo Japan Auctions is the most reliable source for locating rare early Zunow customs like the KYGM. A proxy bidding service such as Rinkya allows buyers outside Japan to participate. These frames appear infrequently and move quickly when they do, so setting up keyword search alerts is the most practical strategy.
James Hickman is a former USA Cycling Expert coach, Leukemia & Lymphoma Society’s Team N Training coach and Masters category racer with podium finishes in So Cal events.
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