"A Heritage of Quality, The Spirit of Innovation"

Office Hours: Mon-Fri – 8:30am to 5pm EST | Contact: 1-888-707-1880

Spirit Medical Logo on a stylised header

Optional Upgrades

MA900 RAC Bike Upgrade Kit

MA900 RAC Bike Upgrade Kit


The MA900 flexibly accommodates patients by its incrementally adjustable cranks, from as little as 15 degrees. Smaller degrees render smaller circular lower body motions. As a result, patients with limited ROM can start therapy earlier than by using other rehab equipment. Ultimately, patients acquire passive and active mobilization for hips, knees and ankles.

Training merits with the MA900 include:

  • Isolated closed kinetic chain exercising for quads and hams.
  • Exercising in the pain-free parts of the body, thereby reducing patient's discomfort and fear.

The MA900 can replace most existing 9/16" threaded bike cranks. Your standard exercise bike becomes a clinically effective rehabilitation tool.

The MA900 benefits: total knee replacements, total hip replacements, ACL, MCL, & PCL repairs, ligamentous tears, patella femoral conditions, tibial stress injuries, tendonitis, and other arthritic, neurological, and muscular conditions.

  • Fits both upright and recumbent bikes
  • 10 incremental pedal position adjustments
  • Adjusts from 15 degrees to full range
  • Passive attachment arm allows passive ranging

MA900 RAC Bike Upgrade Kit

MA-902 Lower Extremity
Bi-Lateral Stabilization Set


The set offers advanced calf support for patients experiencing lower body deficiencies or weaknesses that require additional leg and foot alignment to achieve maximal results. This accessory complements the CRS800S Recumbent Stepper.

Training merits with the MA902 include:

  • Minimized lower limb adduction or abduction
  • Easy attachment and removal on footplate assembly
  • Lightweight construction

Key Features:

  • Attachment just below the knee, thereby eliminating any knee torque
  • Fully adjustable to keep the lower limb in proper alignment
  • Calf support pivoting allows the ankle to move freely in its normal path