Black Inc Five-Spoke Wheels: Ultimate Aerodynamics That Ignore UCI Rules

In the world of bicycle wheels, one brand does the most extreme things with the most rebellious attitude—Black Inc. Their Five-Spoke carbon wheel design directly ignores the UCI (Union Cycliste Internationale) regulations on the number of spokes in a wheel, designing wheels based purely on aerodynamic logic.

Brand Background

Black Inc is the component brand under Factor Bikes. Factor is a British high-end bicycle manufacturer whose founding team comes from the F1 racing industry (bf1systems engineering company in Norfolk), headquartered in Norfolk, England.

Factor frames are renowned for elegant carbon fiber craftsmanship and outstanding aerodynamic performance, and Black Inc extends the same design philosophy to wheels and components.

Five Spoke: The Five-Spoke Wheel

Design Logic

Traditional wheels use 20-28 metal spokes to connect the hub and rim. Every spoke generates drag as it rotates through the air. The logic behind the Five-Spoke design is simple: replace 20+ metal spokes with 5 wide carbon fiber “spokes,” drastically reducing the number of rotating components and thereby lowering aerodynamic drag.

Specifications

Specification	Data
Rim depth	65mm
Weight (front)	Approx. 900g
Weight (rear)	Approx. 1,050g
Internal rim width	19mm
Number of spokes	5 (front) / 5 (rear)
Price	€3,500-4,000 per wheel
Taiwan street price (pair)	Approx. NT$250,000-280,000

UCI Rule Issue

UCI regulations require that race wheels have at least 12 spokes. The Five Spoke’s 5 carbon spokes clearly do not meet this requirement. This means:

• Cannot be used in UCI-sanctioned races (including most road races and track events)
• Can be used for: triathlon (IRONMAN and other events not governed by UCI rules), personal training, and recreational riding
• Gran Fondo: most Gran Fondos do not strictly enforce UCI equipment rules

Aerodynamic Performance

Wind Tunnel Data

Black Inc claims that the Five Spoke wheel outperforms nearly all traditional spoked wheels in wind tunnel testing. The main reasons:

1. Fewer rotating drag elements: 5 wide spokes vs. 24 thin spokes means a smaller total frontal area
2. Airfoil cross-section of the carbon spokes: Each carbon spoke has a cross-section similar to an aircraft wing profile, generating far less drag when rotating than round-section metal spokes
3. Integrated structure: The carbon spokes are molded as one piece with the rim and hub, with no protruding nipples or spoke heads

Crosswind Stability

The five-spoke design’s behavior in crosswinds is a double-edged sword. Each carbon spoke has a larger surface area and will catch the wind like a sail. However, because there are fewer spokes, the frequency of crosswind torque changes is lower during fast rotation, making it potentially easier for riders to anticipate and respond.

Other Black Inc Products

Traditional Carbon Wheel Series

Model	Rim depth	Weight (front + rear)	Taiwan street price (approx.)
Thirty	30mm	1,250g	NT$95,000
Forty Five	45mm	1,380g	NT$98,000
Sixty	60mm	1,460g	NT$100,000

Black Inc also offers carbon wheels with traditional spoke designs, which are UCI-compliant and can be used in all races. Quality and performance are top-tier, but the price is not cheap either.

Components

Black Inc also produces carbon handlebars, stems, seatposts, and other components, designed specifically for Factor frames but also compatible with other brands.

Visual Impact

There’s no denying that the Black Inc Five Spoke has the strongest visual impact of any wheel set. The visual effect of five carbon spokes spinning, combined with the 65mm rim depth and all-black color scheme, makes the entire bike look like it stepped out of a science fiction film.

On group rides or at coffee stops, a pair of Five Spokes will likely turn more heads than anything else—even more than Princeton’s wave rims.

Real-World Usage Considerations

Advantages

1. Ultimate aerodynamics: In scenarios not restricted by UCI rules, the aerodynamic advantage is substantial
2. Visual impact: Unmatched recognition factor
3. Top-tier quality: Factor/Black Inc’s carbon fiber craftsmanship is first-rate
4. Suitable for triathlon: IRONMAN and other triathlon events are not subject to UCI restrictions

Disadvantages

1. Not serviceable: A damaged carbon spoke = the entire wheel is written off
2. Extremely expensive: A pair exceeds NT$250,000
3. Not UCI-compliant: Cannot be used in most official races
4. Crosswind sensitive: The large carbon spoke area requires attention in strong crosswinds
5. Not particularly light: 1,950g per pair is heavier than traditional carbon wheels at the same price point

Taiwan Market

Black Inc has a Factor distributor in Taiwan, but Five Spoke wheels typically require special ordering. Due to the extremely high price and limited use cases, buyers in Taiwan are mainly:

• Collector-level enthusiasts
• Triathletes (not subject to UCI restrictions)
• Factor owners seeking a complete matching setup
• Riders pursuing the ultimate visual statement

Comparison with Other Non-Traditional Wheels

Item	Black Inc Five Spoke	Lightweight Meilenstein	Princeton Wake 6560
Design feature	Five-spoke carbon wheel	Integrated carbon spokes	Wave rim
Rim depth	65mm	48/56mm	65/60mm
Weight	~1,950g	1,095g	~1,450g
Price	NT$250,000+	NT$200,000	NT$180,000+
UCI compliant	No	Yes	Yes
Serviceability	Low	Low	High
Visual impact	Highest	Medium-high	High

Summary

The Black Inc Five Spoke is not a “rational” wheel choice—it’s not the lightest, it’s not the cheapest, and it can’t even be used in most official races. But it represents an attitude: on the road to pursuing ultimate performance, rules are sometimes meant to be broken. If you’re not bound by UCI restrictions and you’re after pure aerodynamic extremes and unparalleled visual impact, the Black Inc Five Spoke is for you. Its reason for existing is to remind us that bicycles can be crazier and more beautiful than we ever imagined.

Related Reading

• Black Inc 48|58: The Perfect Partner for the Factor Lineup
• Austria’s Xentis: The Unique Aesthetics of Five-Spoke Carbon Wheels
• Global Wheel Brand Map: 50+ Brands Across 20 Countries
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