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Keiser Air300 Leg Curl Pro

SKU: KLCAi02 Category: Tags: , , ,


Completely redesigned to weigh 40 pounds (18 kg) less than its predecessor, our Pro leg curl features lighter moving components that allow for training at even faster speeds – as well as slow eccentric loading of the hamstrings. Offering unilateral or bilateral leg training, a wide resistance range and improvements that include a computer display in line with the user’s sight, ergonomically positioned thumb buttons and a contoured chest pad for added comfort make it the leg curl of choice for athletes and people in rehab.


  • Industry’s best leg curl machine for eccentric loading
  • Offers unilateral or bilateral leg training
  • Wide range of resistance for intense functional workouts
  • Smooth pneumatic resistance
  • Large digital display shows resistance and reps


26” / 660 mm
46” / 610 mm
72” / 1829 mm
113 lbs / 51 kg
10 – 226 lbs / 5 – 103 kg

Individual Product Manuals are being added daily to our Fitness Equipment Manuals page.

If you need one and don’t see it there send a request to

*All deliveries are done to curbside only. We do not/cannot bring items inside a home or business.

Assembly Required: Hand tools and the ability to follow printed instructions is all that is required here.

Boxed: Only partially dis-assembled to keep the shipping cost down.

Fully Assembled & Crated: Ready to use condition once the crate has been removed.


New equipment is just like it sounds: brand new equipment shipped to you.


Demo is equipment is just that: equipment with the very lightest usage as a demonstrator model.


Below is our general refurbishing and remanufacturing process for our commercial-grade fitness equipment:

  1. All Overlays Replaced
  2. All Electronic Sensors Replaced
  3. All Wearable Moving Parts Replaced Regardless of Condition
  4. New Running Belt & Motor Drive Belt On Treadmills
  5. Belts Replaced
  6. Decks Replaced
  7. Frames Repainted
  8. Roller Bearings Replaced
  9. Bushings Replaced
  10. Motors Rebuilt
  11. All Grips Replaced
  12. Decals Replaced
  13. Shrouds Replaced if Cracked
  14. All Electronic and Machine Functions tested twice before shipping

Primo Fitness has been refurbishing and remanufacturing used fitness gym equipment for over 20 years. We only used the highest quality replacement parts and our refurbished or remanufactured machines are like new again when they leave our shop. Here is a video about what everyone should know before purchasing refurbished or remanufactured fitness equipment.

Serviced and Cleaned (for indoor bikes only)

  1. We open the machine and break it down
  2. We then search for worn or broken parts
  3. The parts are then replaced
  4. Cosmetic touch up is done
  5. All functions are tested twice

Serviced & Cleaned is great for light commercial or home gyms, with 2 to 3 hrs. of use per day.

We offer a 30 Day Parts warranty on Serviced & Cleaned, after that, if a part does need to be replaced, they are very inexpensive and easy to replace. We are available for phone consultation if you have any questions.