First Degree Fitness


MX-Select 55 Adjustable Dumbbell

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Imagine this.
You have gotten into a good flow for your workout. Music playing. Pushing you to test your limits. You break through your current plateau. It is time to add more weight to the dumbbells. You have limited space.  You opted for adjustable weight dumbbells.  You fumble around with the plates for what seems like an eternity.  You are finally ready to go. Too much time as passed.  Your momentum is lost.

Regain your momentum.
Enter the MX-Select 55 Dumbbell. The sleek form.  The way it feels in your hand. The seamless weight transition between reps. Rebuilds. Your. Momentum. You are able to push through your sets with more intensity.  You have less fumbling with plates to get ready than ever before. Unique safety features built into the MX-Select 55 help to inspire fresh confidence. And propel you to the next level.

Discover the perfect blend of function and design.
These adjustable dumbbells were created by engineers with a passion for fitness innovation. The MX55 takes on any potential rivals in the market head on.  And comes out on top. You will love the balance and function of the MX55 combined with its unique sculpted form. It is the perfect blend of function and design to use in your training routines.

Soar to new heights.
Push yourself further and reach new heights. The steel craftsmanship of the MX55 looks, feels and functions exactly like a pro-style dumbbell. The perfect balance obtained by shortening each side evenly as weight decreases will ensure you remain stable throughout your workout. Need to get in a quick workout at night without waking the house? Changing weight on these adjustable dumbbells does not involve handling the weight so operation is quiet and smooth.

 * As of 10/20/20 there is a 3 week lead time for the MX-55 before shipping.


  • Steel craftsmanship that looks, feels and functions just like a pro-style dumbbell makes every workout more productive.
  • The length of the weight changes accordingly as weight is added or removed in order to provide perfect balance and stability.
  • There is no need to handle the weight plates directly when adjusting the dumbbell so operation is quiet and smooth.
  • The selector dials settle back into the dumbbell collars after weight selection, eliminating protruding knobs or ends to get caught up on.
  • The open handle design aids in biomechanical and ergonomic precision.
  • The dumbbells weight plates will stay securely in place thanks to the unique rack and pinion design of the MX-55.
  • The dumbbell handset is easy to handle. It can be removed and replaced at 180 degrees without problems.



Dumbbell weight range:
10-55 lbs in 5lb increments or 4.5 – 24.9 kg in 2.25 kg increments

Total weight with stand:
137.5 lbs (62.3 kg)

Dimensions at 55 lbs (24.9 kg):
15.94” long (40.5 cm) – end to end/out of stand

Dimensions at 15 lbs (6.8 kg):
9.58” long (24.3 cm) – end to end/out of stand

Dimension of weight stack:
Distance from outside of dumbbell handle to outside of weight – approx. 4” (10.2 cm)

Dumbbell handle length:
5.21” (13.2 cm) (inside dimensions) by 1.125” (2.9 cm) diameter

System footprint in stand:
18.74” L X 22” W X 30.675”H (47.6 cm L X 55.9 cm W X 77.9 cm H)

    • Shipping Cost: Free Shipping to Continental US!

    • Leaves Warehouse: 15-20 Business Days (estimated)

    • Average Delivery From Order Date: 19-25 Business Days (estimated)

    Shipping and delivery times listed are estimates and could be affected by current events outside the control of Sunburst Fitness Supply. These events include, but are not limited to, the ongoing covid-19 pandemic, protests and demonstrations, hurricanes, or whatever else this crazy year and future years throw at us.

    For more information on shipping and returns, please view our shipping and returns policy.


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