Sportsmith Blog

Bowflex Parts

bowflex xtremeFor all of you Bowflex lovers out there we have some great news for you!!

Sportsmith is proud to announce that we are now carrying Bowflex Replacement Parts. Did you think Sportsmith would let you get away with not working out because a rod cable was broken on your Bowflex? We don’t think so!! Dust off those machines because we have some great new parts in stock for Bowflex. They are at a great low price too! The parts we have in stock are for the following models:

We have several different ways to help you get the right Bowflex parts you need. You can check out the manual or parts diagram for your specific Bowflex home gym by clicking the links above. Call us directly at 888-713-2880 for customer support and we would love to help you find your part!


Red Pedal Tool

Are you an indoor cycle instructor or a spin enthusiast that is tired of wrestling with the removal of the toe cage found on the popular Schwinn Triple Link pedals? You know what kind of headache it is to remove the shoe clip before a class so the pedals are ready for LOOK or SPD shoe cleats.

Now there’s an easier way with the Red Pedal Tool. No more delayed classes, bruised knuckles, or broken pride. With the Red Pedal Tool, Triple Link pedals can be removed safer and easier from your indoor spin bike.

The Red Pedal Tool eliminates the hassle instructors or members face when removing the toe cage used for regular running shoes to make pedals SPD or LOOK compatible.



SPORTSMITH™ is always looking at ways to get new parts and products to its customers, and we pride ourselves on carrying parts for the best exercise equipment in the world. Currently, Concept2 makes some of the best indoor rowing machines in the business, and we are proud to carry the parts that make these machines go!

SPORTSMITH™ has recently begun carrying parts for Concept 2 rowers to all 5 models in the Concept2 line (models A-E). We currently carry over 100 different parts for all Concept2 lines. This includes everything from foot straps and seats to bolts and pulleys.  Just go to and use our easy to understand interface to see all the items we carry for your Concept2 indoor rower.


StairMaster Stepper Resistance Troubleshooting

About This Video

This video covers general resistance troubleshooting for the Stairmaster 4400CL, 4600CL, and SC916 Steppers

Tools Needed: Volt Meter, Jumper Wire

Resistance problems could be either mechanical or electrical in nature.

Mechanical problems are easily identified by noise. If a grinding noise is heard while pedaling, this is an indicator the drive hub assembly is having a problem. If a ratcheting sound is heard while pedaling, this is an indicator of a loose belt or a belt that could be coming off.

Once you’ve eliminated the possible mechanical causes for resistance problems, then it is time to investigate the electrical system.

The easiest test of the electrical system when investigating a resistance problem is to step onto the pedals and access Diagnostics. This is done by pressing Level ^, 6, ENTER. (DIAGNOSTICS will appear in the upper display window.) Press Level Down twice to get to the alternator test. (ALT TEST will appear in the upper display window.) Press ENTER to begin the test. As the video shows, resistance drops out when the test begins. So, if this occurs, press the Level ^ one time. This will turn the field ON. This verifies that voltage is passing from the display through the display cable to the lower control board. This confirms there is good communication between the console and the lower control board and that the voltage is being supplied to the alternator. If resistance is lost during this portion of the test, inspecting the cable should be the first step of action. Look for bent pins, loose connection or crimped wire.

Other components of the electrical system to inspect for resistance problems are the battery, load resistor, speed sensor and alternator.

We’ll discuss the battery first. In order to get a proper reading, testing the battery should be done with the pedals in motion. There are 3 different battery readings a person may encounter. A reading of 6 VDC or greater indicates a good battery. A reading below 6 VDC but higher than 4.8 VDC indicates the battery needs charged for 24 hours. A reading below 4.8 VDC indicates your battery is bad and needs replaced. For more information, watch our battery testing video.

If your battery is good, the next item to check is the speed sensor. The speed sensor should be spaced a business card thickness away from the speed disc. If the speed sensor is spaced properly, the function of the speed sensor can be verified by confirming that proper voltage is present. For more speed sensor troubleshooting, watch our video on speed sensor testing and adjustment.

Next to inspect is the load resistor. Load resistor testing is pretty simple. Load resistors are ohm rated, and you want to verify the proper ohms for the load resistor being tested. Load resistors can cause the resistance to come and go. This means you may pedal a few steps and then the pedals will drop or loose resistance. Then, as the load resistor cools down a bit, you may get resistance again for a few steps. If the resistance goes back and forth like this, the load resistor likely needs replaced. For more information, see our load resistor testing video.

The last electrical component to inspect when investigating a resistance problem is the alternator. The alternator can be easily tested by performing the B+ to Field jumper test. For details on how to perform this test, watch our alternator testing video.

For more information about this video click here.



There is one component of every treadmill that is considered the most important for its smooth operation. That is the running belt. It sees the most wear and tear of any component by far, and needs to be tough and sturdy to resist all the rough treatment it receives. Belts come in all sizes, just like treadmills do, but the one thing you universally want is a high quality belt. Anything else is inefficient and could potentially damage your expensive treadmill!

SPORTSMITH™ GoPro belts are tough, period. They are tested for over 12,000 hours of use and upwards of 30,000 miles of walking. That is the equivalent of walking across China almost 10 times! SPORTSMITH™ GoPro belts feature a carbon fiber underside. This reduces static build up (a major problem with treadmills), and ensures less friction resulting in smoother operation. This will save you hundreds of dollars in costly repairs, and who doesn’t like to save money?

They are manufactured with high quality Class 10 materials or higher, which greatly increase the belt’s overall strength, tractability, and durability. This has the effect of reducing stress and strain on the other components of your treadmill, increasing its overall lifespan as well. With many of today’s products designed with built-in obsolescence, it can be nice to know that some things are still built with quality and longevity in mind. Our belts also come with a 120-day warranty. Who else can offer that?

Here’s a quick comparison of belts currently available.

Attribute SPORTSMITH™ GoPro Belts Other Belts
Anti-Static metallized fiber finish YES Questionable
Seam splice at 100 PSI (the industry’s strongest seam) YES NO
Unique multi-filament thread designed for superior strength YES Questionable
Material class used in manufacture Class 10 Materials Class 5 Materials
Material consistency for reduced motor amp draw, roller shaft load, noise level, and roller bearing stress YES Questionable
Overall lower maintenance costs YES NO

As you can see, SPORTSMITH™ GoPro belts are some of the highest quality available in the market today. Here is what one of our long time customers had to say:

“Your belts were half the price of the OEM (Original Equipment Manufacturer) belts, so I gave them a try. Yours were a lot better! The belt seam is of far greater quality than the original OEM belt. I have ordered parts for other units and found the same high quality of work in all of your parts. SPORTSMITH™ should have a slogan like ‘Double the quality at half the price’ or something similar. I thank you for the quality of your treadmill belts and better yet the low price.”

Reginald L. Jones, CBET – Marshall Medical Center, North Guntersville, Alabama

The bottom line is that SPORTSMITH™ GoPro treadmill running belts are simply better made than almost anything else. They save you money, time, and trouble when it comes to repairs and replacement parts. In today’s world, everyone could stand to have more money, more time, and less headache!


SPORTSMITH™ Announces StairMaster® and Schwinn Fitness® Product Support Tech Center

Tulsa, OK – June 7, 2010 – SPORTSMITH™, the nation’s largest supplier of fitness equipment parts, today announced its alliance with StairMaster® and Schwinn Fitness®. Beginning June 1, 2010, the company will launch the Official Authorized Product Support Center, sourcing all non-warranty replacement parts and providing technical support worldwide for legacy StairMaster® and Schwinn Fitness® Models.

An additional 20,000 square feet of warehouse space accommodates its expanded parts selection. StairMaster® and Schwinn Fitness® non-warranty equipment owners will now receive around-the-clock service through the new StairMaster Product Support Center accessible at

Using this web portal, consumers may purchase replacement parts, view parts diagrams and watch repair tutorial videos. Live web-based technical support will also be available via online chat. Improved shipping rates have already been secured.

"This alliance allows us to better utilize our staff and focus on growing our business,” explains Dustin Grosz, StairMaster CEO. “We chose SPORTSMITH™ because of their vast knowledge of the StairMaster® and Schwinn Fitness® brands, including their innovative warehouse capabilities and same day shipping of fitness equipment parts and fitness products."

Moving forward, StairMaster™ will concentrate efforts on manufacturing and warranty services for existing business segments. “As the business grows, we are relying on SPORTSMITH™ to be the experts and manage the non-warranty aspects,” continues Grosz.

StairMaster® and Schwinn Fitness® models include:

StairMaster® Stepper Models

  • 4000PT
  • 4100PT
  • 4200PT
  • 4400CL
  • 4400PT
  • 4600CL
  • 4600PT
  • 7000PT StepMill
  • SC916 StairClimber
  • SM916 StepMill

Schwinn Fitness® Bike Models

  • AC Classic
  • AC Performance
  • AC Sport
  • IC Elite
  • IC Evolution
  • IC Evolution SR
  • IC Pro

With a 15-year legacy, SPORTSMITH™ is proud to be the nation’s leading product support company with a solid reputation within the fitness industry. The company has built its stellar reputation by consistently delivering world-class quality product support, efficient customer service and expert technical support. The company offers the most technologically advanced user-friendly website in the fitness industry.

"We are honored to be chosen by StairMaster® as the company’s preferred product support provider,” states Brad Schupp, President of SPORTSMITH™. “We’re ideally poised to add real value to the company’s existing operations. We’re driven to ultimately enhance the industry as a whole by helping organizations focus on their core strengths, whether that is manufacturing world-class exercise equipment, developing the finest fitness facility within their community  by making exercise equipment maintenance as fast, easy and cost efficient as possible. SPORTSMITH™ is a proven asset to the OEM manufacturers we work with and health clubs alike, that incorporate SPORTSMITH™ product support services within their business practices."

For more information, call 888-713-2880 or visit


Founded in 1995, SPORTSMITH™ is the nation’s largest supplier of fitness equipment and parts for health clubs and health-conscious individuals. The company is recognized for its superior quality, express same-day shipment on all orders, comprehensive selection of more than 40,000 individual items and overall value, with products 10 to 30 percent below competitive retail prices. The company serves customers through its 40,000 sq. foot state-of-the-art office warehouse, with orders placed by mail, fax, phone or online via its direct mail catalog and secure ecommerce website.


Electrical Troubleshooting for Stairmaster

Stairmaster 4600, 4400, & 4000PT Stairclimbers, among the most popular exercise machines sold on the market today, have three electrical components that are responsible for most troubleshooting calls.  The Alternator, Diode, and the resistor are the heart and soul of the Stairmaster 4600/4400PT Stairclimber and often cause resistance levels to drop creating performance problems.

Tools Needed:

7/16”, 3/8”, & 1/4” nut drivers. 4” piece of wire with alligator clips attached to each end, and a multi-meter,


The Stairmaster loses all resistance when you step onto the pedals.

Alternator Test:

First, remove the machine from its power source. Then remove the side panels so you have a clear view of the alternator. On the back of the alternator, remove the black wire from the terminal B+ (marked POS). Remove the brown wire from the field terminal. You will need a length of wire 4” long with alligator clips attached to each end of the wire. Attach the wire to the B+ (POS) terminal and the field terminal, step on the machine for 10-15 seconds; if full resistance is present, the alternator has correct current flow. If no resistance is present, the next item to check is the alternator brushes. The brown square plate with two machine screws is the cover to the brushes. Remove the two machine screws with a ¼” nut driver and remove the alternator brushes. There should be ¼” or more of brush, any less and the alternator brushes should be replaced first. If the proper amount of brush is available, replace the alternator.

Diode Test:

Remove the brown wire and diode from the field terminal of the alternator and set the multi-meter to the Ohms setting. Place one lead on each end of the diode, and then reverse the leads. A good diode will indicate a high reading in one direction and a lower reading in the opposite direction. Replace the diode if both readings are high or if both readings are low.

Resistor Test:

Remove one wire from the load resistor and place one lead from the multi-meter, one each threaded post on the resistor. If the multi-meter does not read 0.5 Ohms, replace the resistor.  As with any maintenance, procedures always consult your owners’ manual or seek the advice of a qualified repair technician.

Stairmaster Equipment Troubleshooting Videos


Star Trac 4000 Treadmill Belt and Deck Replacement

Star Trac 4000 Treadmill Belt and Deck Replacement

Tools Needed: Phillips Screwdriver, ¼” Allen Wrench, 4MM Allen Wrench, ½” Wrench, Bungee Cord, Pliers (optional). Tools needed may vary depending on your hardware.

  1. Switch the Power off on the unit.
  2. Next, unplug the unit from the wall
  3. Loosen the two lower bolts from the upper portion of the right handlebar and remove them.
  4. Loosen and remove the bolt in the bottom of the right handlebar.
  5. Now carefully twist the handlebar clockwise to remove it from the unit.
  6. Remove the finger guard retaining screws and carefully remove them from the deck at each end of the rear roller.
  7. Loosen each rear roller bolt by 10 full turns. Then count the remaining turns necessary to remove the rear roller bolts. Remember to write down the number of turns needed to remove the bolts in each side for future reference.
  8. Carefully remove the rear roller from the unit. Clean any wax or debris buildup from the roller and place it aside.
  9. Raise the shroud and secure it with a bungee cord.
  10. Work the drive belt off the motor pulley by hand turning the flywheel while pushing the belt aside.
  11. Now remove the front roller retaining bolts.
  12. Carefully remove the front roller from the unit. Clean off any wax or debris buildup and set it aside.
  13. Loosen and remove the deck bushings from the left side frame rail. Stubborn deck bushings can be removed with the assistance of pliers, once the screws have been loosened completely.
  14. Move the deck toward the left side of the frame to free the deck from the right side. The deck will move down once the frame has been cleared.
  15. Remove the deck and belt by raising the right side edge of the deck over the frame rail and sliding it to the right to remove.
  16. When installing a new belt or deck it is important to note that a new belt and deck surface should always be installed together. Failure to adhere to this guideline will severely shorten the life of the installed parts. Some decks can be used on both sides. However, be sure that each side is only used once. Be sure to install the belt in the proper direction on the unit. Consult the belt manufacturer for proper direction if the belt is not marked or you are unsure.
  17. Install the belt and deck by first putting the belt on the deck, and then installing them from the right side as a unit.
  18. Be sure the deck is lined up with the frame and push the deck to the left side.
  19. Now carefully lower the right side of the deck to insert it into the frame rail and then push the deck to the right as far as possible.
  20. Install the deck bushings from the left frame rail. (Check with mfr. for proper torque during install process.)
  21. Carefully place the front roller on the deck under the belt and push it forward into place, while placing the drive belt on the inside of the drive pulley.
  22. Replace the front roller bolts. (Check with mfr. for proper torque during install process.)
  23. Now spin the roller by hand while pushing the drive belt onto the pulley. Be sure to spin the roller several times to insure complete installation of the drive belt on the pulley.
  24. Install the rear roller into unit. Carefully start each bolt and turn one to two threads to ensure no cross-threading has occurred.
  25. Tighten each rear roller bolt the number of turns you kept earlier for reference.
  26. Install right handlebar and bolts into the unit. (Check with mfr. for proper torque during install process.)
  27. Now, Plug in and power on the unit.
  28. Carefully remove the bungee cord from the shroud and lower it back into place.
  29. Start the unit at a very slow speed and check for proper belt alignment. Remember to start at the slowest speed possible and be ready to stop the unit quickly if needed.
  30. If the belt is moving to right side of unit tighten the right roller bolt, If the belt is moving to the left side of the unit tighten the left roller bolt until the belt is tracking properly.
  31. Caution: make very small adjustments such as ¼ turns and then watch the belt for several moments before making another adjustment.
  32. Once the belt is tracking properly walk on the unit at a slow speed and check for belt slippage on foot fall. If this is happening tighten each of the rear roller bolts equal turns until the slippage is no longer occurring. Caution: make very small adjustments such as ¼ turns and then watch the belt for several moments before making another adjustment.
  33. Now use the unit at a jogging speed to check for belt travel or slippage.
  34. If slippage still occurs make small equal adjustments (1/4 turns) to both sides of rear roller and re-test.
  35. Install the finger guards once you have enough clearance from the rear roller.
  36. Some manufacturers require wax or lube during the install process, please consult your owner’s or service manual for further information regarding this.

Items Discussed Above

Treadmill Running Belt for Star Trac SS #: P031301630S

Deck, Star Trac Treadmill SS #: P030501630S