Item Condition: New
Replacement for Some Costway Superfit Rectangular Magnetic Safety Key Treadmill 14 × 35 mm (Approx. 0.55" × 1.38")
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Item Description
Condition New
Superfit Rectangular Magnetic Safety Key – Treadmill Replacement - Measure Before Ordering
This rectangular magnetic safety key is commonly used on Superfit treadmills (Costway) and similar compact folding or 2-in-1 models. It features a small rectangular magnet housing designed for consoles with narrow, flat magnetic switch plates rather than deep insert slots.
🔩 Key Features
-
Compact Rectangular Design
Slim profile fits smaller console safety switch areas found on many Superfit-style treadmills. -
Magnetic Emergency Stop Function
Instantly shuts off the treadmill when the key is pulled—this acts as the machine’s primary safety system. -
Clip-On Safety Lanyard
Includes cord and clothing clip for automatic shutoff during use. -
Lightweight & Easy to Use
Simple placement and removal for quick start/stop operation.
📐 Specifications
- Overall Dimensions: 14 × 35 mm (Approx. 0.55" × 1.38")
- Shape: Rectangular
- Magnet Type: Flat magnetic contact
- Material: Durable ABS plastic housing
- Attachment: Safety cord with clip
🏃 Compatibility
Primarily used on:
- Superfit / Costway treadmills (2-in-1 folding models, under-desk treadmills)
- Some compact residential treadmills with narrow rectangular switch plates
Superfit is a Costway brand with multiple residential treadmill models that use proprietary replacement parts like safety keys.
⚙️ How It Works
-
Place Key on Console
Magnet completes the circuit so the treadmill can run. -
Attach Clip to Clothing
Secures to your shirt or waistband. -
Emergency Stop Activation
If pulled away, the treadmill immediately shuts off.
✅ Compatibility Notes
- Best for flat or shallow safety switch areas
- Not compatible with round or large-diameter magnet keys
- Must match both shape (rectangular) and size (14×35mm)
💡 Why This Size Matters
- Smaller footprint = fits compact consoles
- Prevents loose contact or intermittent shutdown
- Ensures proper alignment with narrow magnetic plates
Let customers speak for us
from 1240 reviewsOrdered a part from Hydra Fitness Parts because the OEM part was back ordered for months. Part came in just a couple of days and had it installed by my service tech shortly after. My cross trainer works like new again. Definitely recommend.
Works great perfect fit would buy again
I moved my treadmill from one room to another. I happened to break off a rear foot to it during a difficult spot. It has been like this for 2 years. I decided to look for the part, it was hard to find. But then I found it and jow my treadmill is back together and ready to use
Ordered a part for our treadmill that got lost during a move. Perfect fit! Quick and easy shipping. Would highly recommend if you are looking for odd parts for your Horizon treadmill.
Hydra fit had the part I needed to repair my Bowflex treadmill for only $150. Bowflex techs were telling me I needed a new monitor control for $2,000 but I knew that was wrong because there was no electrical supply to the monitor so it couldn’t be that! Hydrogen gave me a couple ideas I I figured it out. NO thanks Bowflex, and thanks hydro fit.
Used power rods appear to be in good shape and delivery time was very good.
Parts no longer made from my treadmill. Hydra Fitness Exchange had a front roller that works great! Quiet, smooth, almost like new again! Timely shipping, good packaging, helpful website. Thanks!
Product fits perfect. Was able to verify that it would fit my model, and it arrived in a timely fashion. I would order from you guys in the future.
Spirit XE200 elliptical. Common problem of the wheels jumping off and galling the aluminum track rail covers. By the time I fixed the problem, my original track rail covers were too damaged. These were inexpensive and appear to be OEM. Only two bolts to swap them out. Excellent!
Ordered replacement part for my eliptical machine and fit tightly into place and the machine is working fine.
Upon receipt of the item, it would not charge. In working with them I was told to give charging one last shot. This time I pressed the start button multiple times and it started to charge. It synched with my bike. I thanked them for their patience in working out the problem.
The website was easy to use and the product arrived when promised.
We’ve been looking for this part for about 7 years. It fits perfectly. Shipping time was excellent.
Thank you so much!
Product was received on time and fit the description as advertised.
Great value for the price.
