FROG-LEGS PHASE-TWO Shock Absorbing Wheelchair Caster Forks - Sold as pair

Please note the Phase Two forks are not compatible with Tilite ZR or TR chairs. 

*Caster Wheels not included & sold separately here* 

*Frog Legs Full Suspension system can be found here which includes a choice between a pair of Phase I or II Forks, Caster Wheels, and bearings*

Material of each Frog Legs Fork Phase 

• Phase I forks are aluminum anodized forks
• Phase II forks are Carbon Fiber forks 

About Company:

Founded in 1997 by Mark Chelgren, the company started up after a chance encounter with a quadriplegic rugby team. Instead of fixed forks that require the wheel to move up and over obstructions — bouncing the rider in the process, Chelgren designed his forks allowing them to move smoothly over impediments in an arc path, functioning much like airplane landing gear. 

In 2016, Chelgren felt he and Frog Legs could produce a better product by switching from machined aluminum to an even lighter alternative. That effort led them to carbon fiber composites. The second-generation caster wheels make use of two PlastiComp long carbon fiber-reinforced composite materials. A long carbon fiber-reinforced nylon 6/6 composite is used in the wheel forks, and a long carbon fiber-reinforced thermoplastic polyurethane makes up the wheel hub. 

	Leading the evolution of suspension - Unique long carbon fiber material.
Material Strength Comparison -- Tinsile strength of Phase Two Carbon Fiber twice that of T60/61 Aluminum, Validated through Finite Element Analysis Validation Optimal Fiber Orientation -- Frog Legs proprietary design & custom material designed using independent mold flow analysis
	Progressive Spring Rate -- The wedge becomes stiffer as the fork compresses keeping it from bottoming out while remaining sensitive to impact. Wedge polymer optimizes absorption zone for improved bump response. Supports user weight range of 50 to 250 lbs.

Product Description:

The long carbon fiber-reinforced nylon composite used in the new forks helps make them 33% lighter than its aluminum predecessor and twice the tensile strength.

They are proven to be ultra strong, and carbon composite material has softer impact on walls and other surfaces. These forks is the new wedge-shaped polymer bushing. The new design actually makes the suspension have a progressive rate of shock absorption. On the small, quick ripples, such as those lovely yellow sidewalk pimples they put at the curb cutouts. Wedge polymer optimizes absorption zone for improved bump response. 

The new shape and design is that they will support all weights from 50 to 250 lbs. The Phase-Two fork from Frog Legs, Inc. has now revolutionized the wheelchair fork. It's stronger, lighter, better, faster, and even less expensive.  

How to check Caster Barrel and Wheel size:

• Make: Locate the appropriate make and model of your chair.
• Weight: Choose your weight range to achieve the maximum rider experience.
• Caster barrel to floor: Proper caster barrel to floor height impacts the tilt of the chair.

How to Measure Caster Barrel to Floor Height:

Frog Legs available in different colors:

Black, Blue, Purple, Orange, Red

NOTE: Sold as pair

Frog Legs - PHASE-TWO Wheelchair Caster Forks (Pair) Buyer’s Guide

The Frog Legs - PHASE-TWO Wheelchair Caster Forks (Pair) are front caster fork assemblies engineered to replace standard rigid wheelchair forks with a shock-absorbing design. Built with integrated suspension technology, the frog legs caster forks are intended to reduce vibration transfer through the front casters during everyday wheelchair propulsion.

Frog Legs Caster Forks Integrated Suspension System

The Frog Legs caster forks incorporate an internal elastomer-based suspension mechanism designed to absorb impact from uneven surfaces. This system compresses under load to help manage vibration transmitted through the caster assembly. The suspension unit is enclosed within the fork housing to maintain alignment. The design is engineered for consistent mechanical response during repeated use.

Frog Legs - PHASE-TWO Wheelchair Caster Forks Structural Construction

The Frog Legs wheelchair caster forks are manufactured from high-strength materials selected to withstand repetitive front-end impact. The fork arms are engineered to maintain rigidity while allowing controlled suspension travel. The structural geometry is designed to preserve caster alignment. Reinforced components support long-term durability under daily propulsion conditions.

Compatibility with Standard Caster Wheels

The Frog Legs wheelchair caster forks are designed to accommodate standard wheelchair caster wheel sizes depending on configuration. Proper fork size selection ensures correct wheel clearance and alignment within the wheelchair frame. Axle mounting points are engineered for secure caster wheel installation. Compatibility should be verified based on wheelchair model and caster specifications.

Wheelchair Caster Forks Elastomer Performance Design

The Frog Legs - PHASE-TWO Wheelchair Caster Forks utilize second-generation elastomer technology engineered for improved shock management. The elastomer component is calibrated to compress and rebound in response to terrain irregularities. This mechanical response is designed to reduce repetitive front-frame vibration. The elastomer material is housed to protect against environmental exposure.

Front-End Vibration Control

The Frog Legs wheelchair caster forks are engineered to address vibration generated at the front casters when navigating cracks, curbs, and uneven pavement. The suspension mechanism allows vertical movement within the fork assembly. This vertical travel is structured to help manage impact forces before they transfer to the wheelchair frame. Proper installation ensures effective suspension performance.

Pair Configuration for Balanced Installation

The wheelchair caster forks are sold as a matched set to support symmetrical front-end suspension. Installing both forks maintains balanced compression characteristics across the wheelchair. Paired installation supports consistent caster height and alignment. Using a matched set helps preserve wheelchair handling geometry.

Multiple Size and Mounting Options

These caster forks are available in different sizes and mounting configurations to match varying wheelchair frame specifications. Selecting the appropriate fork length and axle diameter is essential for proper fitment. Compatibility depends on caster wheel size and frame design. Accurate measurement ensures correct integration.

Maintenance and Inspection Considerations

The Frog Legs - PHASE-TWO Wheelchair Caster Forks (Pair) require periodic inspection of mounting hardware and suspension components. Checking bolt tightness and elastomer condition helps maintain consistent performance. Routine cleaning removes debris from moving parts. Proper maintenance supports long-term mechanical reliability.

Frog Legs - PHASE-TWO Wheelchair Caster Forks (Pair) Review

The Frog Legs - PHASE-TWO Wheelchair Caster Forks (Pair) are suspension-equipped caster fork assemblies designed to reduce front-end vibration in manual wheelchairs. Featuring integrated elastomer suspension technology, durable structural construction, and compatibility with standard caster wheels, the frog legs caster forks provide a mechanical upgrade for enhanced front caster performance.