What Exerfly does

Exerfly, a brand of Wisconsin-based manufacturer Dynamic Fabrication & Finishing, designs and builds motorized flywheel training equipment used in clinical rehabilitation, elite sports performance, and commercial fitness facilities. The company's flagship differentiator is its proprietary motorized eccentric overload technology — claimed to be the only flywheel device capable of delivering 1-80% eccentric overload per rep — combined with industry-leading loading capacity (up to 0.8 kgm² of inertia via five flywheel sizes and stackable configurations). The hardware portfolio comprises three core units (RackFly, 3x3 Rack Model, Ultimate), a motorized technology module, accessories, and the Exerfly mobile app that streams real-time kinematic metrics (velocity, power, force, torque, acceleration) over Bluetooth. Equipment is USA-crafted in Eau Claire, Wisconsin, with a 2-year limited warranty on equipment and a lifetime warranty on steel frames.

Exerfly distributes through a B2B direct-sales model with quote-based pricing, supported by dedicated applied sport scientists for customer onboarding. Customers span professional sports leagues and organizations (UFC, NFL, NBA, Premier League, NHL, PGA Tour, MLS), collegiate athletics (NCAA, ACC, Big 12, Big 10, SEC, PAC 12), higher education (Ohio University), professional clubs (Charlton Athletic FC), and physical therapy providers (Perform Strong Physical Therapy, Peak Fitness & Sports Training). The company maintains a content-driven marketing posture anchored in published research studies and case studies, including quantified outcomes such as 27% vs 18% strength gains in ACL rehab, 13% CMJ improvements in professional athletes, and 28% greater knee extensor power gains in older adults versus traditional training.

International commerce is supported through DDP (Delivery Duty Paid) shipping terms and EORI-number customs handling for the EU. The legal entity of record is Dynamic Fabrication & Finishing, and the company is privately held with no disclosed funding rounds, headcount, or revenue. Nick Bolton is identified as co-founder. The company operates as an active, privately held commercial enterprise without public listing or institutional investment disclosed in the available record.

Name

Exerfly

Legal name

Dynamic Fabrication & Finishing

Website

https://exerflysport.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

11–50 employees

Short description

Exerfly, a brand of Wisconsin-based manufacturer Dynamic Fabrication & Finishing, designs motorized flywheel training equipment with proprietary eccentric overload technology, serving professional sports teams, collegiate athletics, rehabilitation clinics, and commercial fitness clubs through direct B2B sales.

Ownership category

akta.pro rank

Headquarters

HQ city

Eau Claire

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Marketing or Sales, Personnel

Revenue model

1. Flywheel Training Equipment Sales: Sale of motorized flywheel training equipment including RackFly, Ultimate, and 3x3 Rack Model systems along with accessories. Equipment is sold through direct sales with quote-based pricing. Includes 2-year limited warranty on equipment and lifetime warranty on steel frames.
2. Accessories and Components: Sale of accessories including adjustable benches, rope guides, and replacement components for the flywheel training systems

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Exerfly designs, manufactures, and sells motorized flywheel training equipment for clinical rehabilitation, elite sports performance, and commercial fitness facilities. Its core product line (RackFly, 3x3 Rack Model, Ultimate) uses proprietary motorized eccentric overload technology to deliver 1–80% eccentric overload per repetition, with up to 0.8 kgm² of inertia from up to 8 stacked flywheels. The equipment is complemented by the Bluetooth-enabled Exerfly App for real-time performance tracking and is sold primarily through direct B2B sales.

Product overview

Exerfly offers a complete flywheel training equipment portfolio built in the USA, featuring motorized eccentric overload technology as the key differentiator. The core product line includes the motorized RackFly (rack-mounted with motorized eccentric control), the 3x3 Rack Model (high-capacity loading system), and the Ultimate (portable training device). All devices offer 5 flywheel sizes with up to 0.8 kgm² inertia and the ability to stack 8 flywheels. The proprietary Motorized Technology enables 1-80% eccentric overload per rep. The ecosystem is complemented by the Exerfly App for Bluetooth-connected real-time performance tracking, plus accessories including adjustable benches and rope guides. The system is designed for variable resistance training, automatically adapting to user effort, and is backed by 30+ years of manufacturing excellence with Wisconsin-based production.

Differentiator

Problem solved

Functional benefit

Products and services

• RackFly Rack-mounted motorized flywheel training device that delivers eccentric overload via proprietary motorized technology, enabling 1–80% eccentric overload on every rep based on concentric output. Targeted at sports performance facilities, rehabilitation clinics, and professional sports teams.
• 3x3 Rack Model Rack-mounted flywheel training system offering 5 flywheel sizes with the ability to stack up to 8 flywheels, providing up to 0.8 kgm² of inertia. Designed for facilities that require the largest loading capacity on the market.
• Ultimate Portable flywheel training device with premium USA build quality and variable resistance that automatically adapts to user effort. Designed for versatile use across clinics, performance centers, and gyms.
• Exerfly Accessories Supporting hardware including adjustable benches and rope guides that extend the exercise versatility of Exerfly flywheel training systems.
• Exerfly App Mobile application for iOS and Android that connects to Exerfly devices via Bluetooth and tracks real-time performance metrics including Mean Velocity, Peak Velocity, Mean Power, Mean Acceleration, Mean Torque, and Mean Force, with workout target features.

Quantifiable outcome

• 27% lower body strength improvement vs 18% with traditional training in ACL rehab patients
• +6 more outcomes

Named customers11 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators3 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Exxentric: Stockholm-based manufacturer of flywheel resistance training equipment, including motorized kBox and inertial-based devices. Direct competitor in the same flywheel training category serving similar sports performance, rehab, and tactical markets.
• Versaclimber: Manufacturer of climbing/exercise machines used widely in professional sports performance, military, and rehab settings. Competes with Exerfly for the same pro-team and sports-performance equipment budgets.
• Keiser: Manufacturer of pneumatic and flywheel-based training equipment (including Keiser Infinity Series). Sells into professional sports performance and rehabilitation with a similar B2B model and is a direct competitor in flywheel/pneumatic resistance equipment.
• xPO Perform: Flywheel-based sports performance training provider offering coaching and equipment programs. Direct peer in flywheel training for athletic performance and conditioning.

Broad incumbents

• Sorinex: Established manufacturer of strength training equipment heavily used in college and pro sports facilities. Broader incumbent competing for the same athletic department and pro-team equipment budgets with a wider product portfolio.
• Eleiko: Premium strength training equipment manufacturer serving elite sports performance, Olympic, and rehab markets. Competes in the same high-end athletic strength equipment space but with a broader product line.
• Life Fitness (Cybex): Global incumbent in commercial fitness equipment including the Cybex brand for rehab and medical-grade strength training. Competes for clinical rehab and sports medicine budgets with much broader product depth.
• Technogym: Premium global fitness equipment and digital wellness platform serving clubs, sports performance centers, and rehab facilities. A broader incumbent whose connected fitness vision overlaps with Exerfly's performance facility customers.
• Rogue Fitness: Large-scale manufacturer of strength and conditioning equipment widely used in CrossFit, collegiate and pro training facilities. Competes for similar athletic performance equipment spend with a broader, lower-priced catalog.

Emerging players

• Tonal: Connected home strength training system with digital weight and intelligent coaching. Represents the consumer smart-gym frontier that could shift demand and competitor attention away from specialty B2B equipment like Exerfly's.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/exerflysport
• YouTubeyoutube.com/@Exerfly
• Facebookfacebook.com/people/Exerfly/61566431016907
• LinkedInlinkedin.com/company/exerfly
• Instagraminstagram.com/exerflyusa

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Exerfly