Circle Engineering Circle Engineering
Carbon fiber texture

Capabilities & Technology

From raw carbon fiber to finished wheels — every step controlled, tested, and perfected in-house.

Note: Most of our devices are related to exclusive technologies and designs which are not convenient to display publicly. The descriptions below convey our capabilities without revealing proprietary details.

Manufacturing Technology

Endurance and precision testing equipment at Circle Engineering

Endurance Testing

Our adjustable high-load test equipment performs continuous long-term rolling and impact simulation. Test conditions can far exceed common protocols such as UCI and ISO, giving our customers confidence that every wheel withstands real-world extremes.

Automatic tubeless tape winding machine

Automatic Tubeless Tape Winding

Consistent TLR (tubeless-ready) tape application ensures the same airtight performance from wheel No.1 to wheel No.10,000. Automated precision eliminates human variation for reliable sealing every time.

Precision calibration tools used in wheel building

Professional Hand Craft & Precision Tools

Where automation meets artisanship. Our skilled technicians use regularly calibrated precision tools to ensure every wheel is perfectly balanced and meets exacting tolerances.

Circle Engineering technician working on an in-house carbon fiber rim

Carbon Fiber Rims Made In-House

We don't just build wheels — we manufacture the carbon fiber rims themselves. Every detail is controlled inside one system, from raw fiber to finished rim, giving us complete oversight of quality.

Automated carbon rim production line, monochrome

Automated Rim Production

Every rim we sell is wound, cured, machined and inspected on our own line in Taiwan, based on our own patented dual-axis filament winding process.

For a brand, that is the difference between a spec sheet and a promise you can keep.

Production Consistency

Automated carbon fiber winding and machining process

Wound By Machine, Not Laid By Hand

Automated winding delivers repeatable precision that hand layup cannot match. Every rim follows the same program, the same tension, and the same quality standard.

Circle Engineering production line technician at work

One Line, One System, One Standard

Every rim is wound, cured, machined, and inspected on our own line in Taiwan. One integrated system means one consistent standard — no outsourcing, no variation.

CNC spoke hole drilling and machining equipment

1-Step 4-Axis Spoke Hole Precise Machining

Every spoke hole is drilled and finished in a single setup on our 4-axis CNC machining center. One-step machining holds hole position, angle, and tolerance to tight specifications across the whole rim — delivering even spoke tension, reliable nipple engagement, and wheels that stay true over time.

Cross-section of a finished carbon fiber rim

Rim No.1 and Rim No.1000 Are the Same Rim

The winding program, tension, and result repeat day after day. Machine winding instead of hand layup removes variation. Consistency is not a target — it's a given.

See It For Yourself

Schedule a factory tour to experience our capabilities firsthand.

Schedule a Factory Tour