1912 Henderson Four: The 7 HP Motorcycle That First Circled the Globe
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Carl Stearns Clancy and the 1912 Henderson Four that made history.
Carl Stearns Clancy, a 22-year-old American adventurer, became the first person to circumnavigate the globe on a motorcycle in 1912-1913. Riding a 1912 Henderson Four with only 7 HP, no front brake, and zero navigation aids, he covered 18,000 miles (29,000 km) through Europe, Africa, Asia, and North America. His name is trending again in March 2026, driven by record-breaking vintage auctions and a resurgence of classic adventure culture in the U.S.
1. Who Was Carl Stearns Clancy?
Carl Stearns Clancy wasn't just a rider—he was a pioneer. In October 1912, he and a friend, Walter Rendell Storey, left New York City on two Henderson Fours. Storey abandoned the trip in England, but Clancy pushed on alone through Europe, Africa, and Asia, eventually crossing the Pacific and riding across the U.S. back to New York in September 1913. He documented the journey in his book "Around the World on a Motorcycle" (1923), which remains a cult classic among adventure riders.
2. The Machine: 1912 Henderson Four (Technical Breakdown)
The Henderson Four was a marvel of its time—a 4-cylinder inline engine in an era when singles and twins dominated. Here are the full specifications of Clancy's bike:
| Specification | Detail |
|---|---|
| Engine Type | 1,068 cc air-cooled inline-four |
| Horsepower | 7 HP @ 1,800 rpm |
| Top Speed | ~55 mph (88 km/h) on paved roads |
| Transmission | 2-speed manual (direct belt drive) |
| Weight | ~310 lbs (140 kg) dry |
| Brakes | Rear drum only (no front brake) |
| Suspension | Rigid frame (no rear suspension), springer front fork |
| Tires | 28" x 2.5" clincher tires (no inner tubes) |
| Fuel Capacity | 2.5 gallons (~9.5 liters) |
| Fuel Economy | ~35-40 mpg (6-7 L/100km) |
3. Why Is He Trending Now? (March 2026)
Clancy's name has resurfaced due to three specific events in the U.S.:
- Mecum Auction Record ($20M+): A rare 1912 Henderson Four (similar to Clancy's) sold for a record price at Mecum's March 2026 auction in Las Vegas, sparking global interest in pre-WWI motorcycles.
- "Scram Africa 2026" Campaign: Adventure riding communities are honoring Clancy's "Gasoline Tramp" spirit with a trans-African rally that explicitly references his 1913 route through Algeria and Egypt.
- West Coast Heritage Rides: Clubs in Oregon and California are organizing "Clancy Trails" events to retrace the roughest sections he documented—especially the muddy, rocky roads of Oregon that he famously called "the worst in the world."
4. The Route: 18,000 Miles of Madness
Clancy's journey remains one of the most insane feats in motorcycle history:
- Start: New York City → England (by ship).
- Europe: France, Germany, Austria, Italy.
- Africa: Algeria, Egypt (largely unpaved desert tracks).
- Asia: Palestine, Syria, Iraq, India (with the bike shipped across the Arabian Sea).
- Pacific: India → Hong Kong → Japan (by ship).
- North America: Seattle → across the U.S. → New York.
He survived bandit attacks in the Middle East, malaria in India, and multiple breakdowns where he repaired the Henderson with hand tools and local blacksmiths.
5. Unique Facts About the Henderson Four
- No Front Brake: The 1912 model relied solely on a rear drum and a "spoon brake" pressing against the front tire—barely effective, especially downhill.
- Belt Drive: Power transferred via leather belts, which slipped in wet conditions and needed frequent tightening.
- Hand-Painted: Each Henderson was hand-pinstriped; Clancy's bike was finished in dark blue with gold accents.
- Survival Rate: Only about 50 of the 1912 Henderson Fours exist today, making them among the most valuable American motorcycles.
TECH INSIGHT: The 1912 Inline-Four
Henderson's engine was revolutionary: a 1,068 cc inline-four with a 180-degree crankshaft, mechanically operated intake valves, and total-loss oil system (you carried oil and manually lubricated the engine). It produced 7 HP at 1,800 rpm—enough for 55 mph, but terrifying on the wooden wheels and skinny tires of the era.
6. Why His Story Matters to Speedo Science
Clancy represents the original "velocity science"—pushing a machine to its absolute limit with minimal technology. His journey is a benchmark for human endurance and mechanical sympathy. In an era of 321 HP supercharged bikes, his 7 HP Henderson reminds us that adventure isn't about power; it's about the will to keep moving.
Source: Henderson Archives | Mecum Auctions | Speedo Science Database
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