JAWS Prime Seated Leg Extension

JAWS Prime Seated Leg Extension

Commercial Selectorised Quad Isolator | 135 kg Stack | Precision Biomechanics

The JAWS Prime Seated Leg Extension delivers top-tier lower‑body isolation training with premium construction and advanced ergonomics - ideal for high‑traffic gyms, athletic centres, and PT studios. Featuring a heavy-duty 135 kg selectorised stack, adjustable contact points, smooth cable‑pulley dynamics, and dedicated angle geometry, this machine empowers users to strengthen and define quadriceps muscles in refined, controlled movement.

Professionally engineered and built from the ground up, the JAWS Prime Seated Leg Extension blends commercial resilience with a user-friendly interface - making it as effective as it is reliable.

Core Features

• 135 kg Selector Stable Weight Stack (5 kg increments)

• Isolated Knee Extension Lever with adjustable ankle/ shin pad

• Ergonomic Seat and Backrest with premium foam and upholstery

• Multi‑Point Adjustability (seat, backrest, shin pad, and start range)

• Commercial‑Grade Cable & Pulley System with sealed‑bearing pulleys

• Heavy‑Gauge Steel Frame with textured, scratch‑resistant powder‑coat

• Compact Footprint with stability brace inclusion

• Standard Finish: Black Frame & Upholstery – Custom Colours Available

Heavy‑Duty Weight Stack for Strength Progression

The machine’s robust 135 kg selectorised weight stack supports users through every stage of progression - from stability‑based muscular activation to strength and hypertrophy lifting. Its incremental setup enables:

• Smooth loading for controlled rep work (high rep, low weight)

• Capability to handle high volumes, drop sets, and strength cycles

• Reliable progression paths for competitive athletes and everyday users alike

Precision Biomechanics for Knee Health

Experience matters - and at JAWS, biomechanics informed every bending pivot and fulcrum point. The fixed lever aligns with natural joint movement, creating an arc that’s intuitive and effective. Coupled with:

• A fully adjustable shin pad that secures users firmly

• Ergonomic rotation axis positioned precisely at the knee for stress‑free extension

• An angle geometry that emphasises quads while protecting hips and lower back integrity

This design delivers a high‑quality extension pattern with minimal joint strain.

Customisable Fit – One Machine, All Users

High commercial utility means accommodating varied anatomies. The JAWS Prime Seated Leg Extension includes:

• Seat position adjustment – accommodates different torso lengths

• Backrest inclination tuning – secures posture and pelvic stability

• Shin pad height/sizing – for controlled lever reach and compression

• Start‑range adjustment – for custom stretch and overload control

Every adjustment is quick via pop‑pins and assisted by gas‑spring or mechanical support.

Smooth Resistance, Consistent Tension

The cable‑pulley system features sealed‑bearing pulleys and a guided path that ensures:

• Friction‑stable motion, even under heavy loads

• Balanced resistance curve through full range — eccentric and concentric match

• Low‑maintenance performance, ideal for frequent use

This consistent feel is key for muscular control and user confidence.

Built for Commercial Longevity

Engineered for daily wear-and-tear, the JAWS Prime Seated Leg Extension stands up to commercial demands:

• Steel structural tubing, powder‑coated for protection against scuffs and corrosion

• High‑density HD foam and vinyl upholstery, moisture‑resistant and hygienic

• Commercial cables and thick‑wall pulleys, rated for extensive use

• Stable baseplate and floor contact foot, ensuring no roll or slip under tension

Every material choice reinforces machine safety and lifecycle performance.

Refined Operator/ Gym Experience

JAWS Prime has integrated practical design elements:

• Clearly labelled adjustment levers and pop-pins

• Compact, vertical weight-stack with high-visibility weight increments

• Foot-level cable routing for reduced visual clutter

• Seated upholstery pressed within frame outlines—easy to wipe and resistant to wear

• Front and side access pathways for easy entry and exit

Maintenance is only a matter of basics - wiping upholstery and lubricating cable guide rods intermittently.

Smart on Space and Style

Measuring approximately 145 cm (L) × 120 cm (W) × 155 cm (H), this machine maximises value in medium-to-large layouts. Its sleek black-on-black finish gives a cohesive aesthetic across gym floors, while integrated custom colour option means branding or theme palette match is easy.

Versatile Application across Training Environments

• Commercial Gyms - fast adjustments, intuitive use, appealing longevity

• Athletic & S&C Centres - isolation control, programming prototype for knee-dominant movements

• PT Studios & Rehabilitation Clinics - detailed fit-focused biomechanics and hot-swap adjustments

• High Volume Use Facilities - quick setup, quick clear floor spacing, consistent feel rep-after-rep

From endurance activation to strength cycles, this machine is a dependable component of any lower‑body stack.

Specifications at a Glance

Standard and Custom Finishes

The JAWS Prime Seated Leg Extension comes preset in black frame with black upholstery. A wide range of premium upholstery and frame colour upgrades are available upon request—enabling visual alignment with facility branding or interior styling at a modest additional cost.

Installation & Aftercare Services

All JAWS Prime machines are:

• Assembled and tested in-house prior to delivery

• Optional installation service available, from our own team

• Supported by ongoing customer service for after-sales queries, part orders, or refurbishing

Optional floor-protection mats and cleaning packages are offered during purchase.

Elevate Lower-Body Training with Premium Precision

The JAWS Prime Seated Leg Extension offers a refined, durable solution for focused quadriceps training—combining strength trainability, biomechanical consistency, and build quality in one premium machine.

This is more than a seat-and-lever combo—it’s a studio-grade quad isolator engineered for everyday lifting, elite performance, and polished facility presentation.

JAWS Prime: engineered to perform, built to last.