Established 1997


Big-Rigs Shock Absorbing Caster Forks for Rear-Wheel Drive Power Chairs

item #: 40087

sku : BF789

brand : Frog Legs Inc.

Big-Rigs Shock Absorbing Caster Forks for Rear-Wheel Drive Power Chairs

List price: $599.00

Quick Overview

  • Fits wheels with diameter sizes of 6x2, 7x2, and 8x2


This shock absorbing powerhouse has same design and features of the Frog Legs Ultra-Sport with the strength and proportion to handle power chair and some adult tilt-in-space applications. Not only will this fork absorb nearly 80% of shock - it will improve your wheelchair's traction by keeping the drive wheels in better contact with the ground.


  • Big Rigs were designed to replace our very popular BULLFROG (all hard points are the same).
  • Suspension fork uses a "hinge" design encapsulating a high energy-absorbing polyurethane cylinder. The cylinder will flex to eliminate vibration and soften bumps by absorbing the force created when the front wheel strikes an object.
  • 3 inches of arch travel allowing the front wheel to lift back, up and over obstacles and prevent pitching
  • Approved HCFA codes E1018R and E1018L
  • Will not change the wheelchair's foot to floor dimensions.
  • Custom stem bolt lengths are available to accommodate a variety of geometry requirements
  • Fits wheels with diameter sizes of 6x2, 7x2, and 8x2.
  • All forks CNC machined of 6061-T6 aluminum
  • 1144 steel stress-proof clear zinc plated flanged studs (stem bolts) available in both metric and imperial measurements.
  • 1144 steel stress-proof stainless steel hinge and axle pins.
  • Bronze bushings within the hinge improves pivoting abilities.
  • Lifetime limited warranty on fork with exception of urethane polymer cylinder. Under normal use, the polymer component holds its shock absorbing ability for 5 to 7 years. Replacement polymers are readily available.
  • Free Shipping


Weight Capacity 600 lbs.
Fits Wheel Sizes 6″, 7″, 8″ & 9″
Warranty Lifetime Limited Warranty

Customer Reviews


Return Policy

If you are not 100% satisfied with your product, we offer a full refund (on most products, see below).
To qualify for a return please note the following:

  • Product must be clean, unused and in its original packaging.
  • Return shipping costs are the responsibility of the customer
  • Items must be returned within 30 days

You must have a return authorization number to qualify for a return:
Please call us at 1-800-320-7140 Monday - Friday 9am to 5pm EST to obtain a return authorization number and a return address. Returns may not be sent to our corporate address

Full Refund

We offer full refund on all:
  • Transport chairs
  • Standard manual wheelchairs
  • Light weight manual wheelchairs
  • Folding ultralightweight wheelchairs* (except for the 9000, etc)
  • Recliner wheelchairs
  • Heavy duty transport wheelchairs
  • Walkers
  • Rollators
  • Wheelchair accessories (bags, ramps & attachments)

10% Restocking Fee

There is a 10% restocking fee on all:
  • Electric Wheelchairs
  • Electric Scooters
  • Heavy duty wheelchairs
  • Volume sales
  • Karman products

15% Restocking Fee

There is a 15% restocking fee on all:
  • Lift chairs
  • Patient Lifts

Sorry, No Returns

We cannot accept returns on all:
  • Hospital beds
  • Mattresses
  • Ultra lightweight ridged frame wheelchairs
  • Custom wheelchairs
  • Court wheelchairs
  • Sport wheelchairs
  • Built to order items
  • Wound care
  • Wheelchair scales
  • Wheelchair Cushions
  • Back Cushions
  • Tempur-Pedic cushions
  • Invacare 9000 series reclining wheelchairs
  • Incontinence Products
  • Nutritionals
  • Bath Safety products
  • Adaptive Strollers
  • Harmar Products

Open Box Specials

  • Open Box Specials are new products that were ordered incorrectly or may have slight imperfections. These Specials are non-returnable and do not include any in-home service.

Refused Deliveries/Packages

  • If packages are refused at the point of delivery, you will be responsible for the return shipping.