If you've ever stared at a frayed gym cable and thought, "How the hell do I measure this thing?" — you're not alone.
Most people have never measured a cable assembly before, every shop seems to have a different method, and if you get it wrong, your new cable won't fit.
This guide settles it. One clear method. Step by step. With photos.
Method 1: Check Your Machine Manual (The Easiest Way)
Before you touch a single bolt — find your machine's owner manual.
Most home gym machines (Weider, Marcy, Body-Solid, Bowflex, Gold's Gym) include a parts list in the back of the manual. The cable assembly is usually listed with its length.
Can't find the paper manual? Search online: "[Brand] [Model] manual PDF" — for example, "Weider Pro 8500 manual PDF". Most manufacturers have downloadable PDFs on their support sites. If you find a part number but no length, email it to us. We maintain a reference database of common machine cable specs and can often tell you the correct length from the part number alone.
If the manual gives you a length — great, you're done. Skip to ordering.
If you can't find the manual (or the manual doesn't list cable specs), move on to Method 2.
Method 2: Remove the Cable and Measure It (The Most Accurate Way)
This the gold standard. If you can remove your old cable, you'll get a perfect measurement.
Step 3: Lay It Flat and Measure — End to End, Outermost Point to Outermost Point
This is the part where people make the most mistakes. Here's exactly what we mean by "end to end":
✅ CORRECT METHOD: Total Overall Length — Outermost Point → Outermost Point
Your measurement must include everything in the cable assembly — the bare wire rope, any coating, the ball stopper (that black sphere on the cable), and both end fittings in their entirety.
· Place the zero mark of your tape measure at the outermost edge of the left end fitting.
· Follow the cable straight through all components.
· Read the measurement at the outermost edge of the right end fitting.
· Record to the nearest 1/8 inch.
· Measure twice. If the two readings differ, measure a third time.
What to use: A flexible tailor's tape measure. Not a rigid ruler or construction tape — those can't follow the cable's natural curve and will give you a short reading.
⚠️ Don't pull the cable tight while measuring. Lay it straight naturally — don't stretch it. Stretching adds length that isn't real, and your new cable will end up too long.
The 6 Most Common Measurement Mistakes
Method 3: The Rope Method (If You Can't or Don't Want to Remove the Cable)
Sometimes removing the cable isn't practical. Maybe you're not confident about reinstallation. Maybe the bolt is seized. Maybe you just don't want to deal with the hassle. That's fine — here's your fallback.
⚠️ LESS ACCURATE (expect ±1 inch): Trace the Cable Path With a Rope or String
1. Get a piece of non-stretch string, rope, or even a long charging cable.
2. Starting at one connector, trace the string along the exact path your cable follows — through every pulley, around every bend.
3. Don't skip the pulleys. The cable wraps around them. The length of cable sitting in the pulley groove must be included. This is the step most people miss.
4. Mark the string at both connection points.
5. Remove the string and measure it with a tape measure.
Pro tip: Use a brightly colored string so you can clearly see where it's touching each pulley. Take a photo of the strung path before you remove it — you may want to double-check against the photo later.
⚠️ Important: The rope method gives an approximation, not an exact measurement. String doesn't sit in pulley grooves the same way a steel cable does. Expect ±1 inch of error.
Don't Forget: Identify Both End Fittings
Length is only half the equation. If you order the wrong connector type, the cable won't attach — no matter how perfectly you measured.
31.6% of our customer emails involve confusion about connector types. This is just as common as measurement questions.
Take clear, close-up photos of both ends of your cable. Then compare them to our Connector Type Visual Guide.
Common end types include: ball end, carabiner/snap hook, eyelet/loop, threaded stud, fork/clevis. If you can't identify yours from the guide — email us the photos. We'll identify them for you.
Also Worth Checking: Cable Diameter (Thickness)
Most home gym cables use one of three diameters:
If you have calipers — measure. If you don't — take a photo of the cable cross-section next to a US quarter coin (25¢). We can determine the diameter from the photo.
Frequently Asked Questions
Q: Should I measure in inches or centimeters?
Inches. All our cables are manufactured and listed in inches. If your tape measure is metric-only: 1 inch = 2.54 cm.
Q: What if my cable is already snapped — how do I measure a broken cable?
Collect all the broken pieces you can find. Lay them out in order, align the break points as closely as possible, and measure the full assembly. If a section is missing — email us photos of your machine. We can often determine the correct length from the machine model.
Q: My old cable stretched over time. Should I subtract some length?
No. Steel cable stretch over years of use is typically less than 1/4 inch — well within tolerance. Order the length you measured. If your cable has visibly elongated (more than 2 inches longer than the spec), it's severely worn and overdue for replacement anyway.
Q: There's a rubber ball stopper in the middle of my cable. Do I include it in the measurement?
Yes. The ball stopper is part of the cable assembly. Your measurement runs from the outermost edge of the left end fitting, through the ball stopper and the cable body, to the outermost edge of the right end fitting. Everything counts.
Q: Different shops seem to measure differently. How do you measure?
We measure total overall length — from the outermost edge of one end fitting to the outermost edge of the other, including all components in between. This matches how our factory produces cables: we cut to total length. Some shops only quote the bare wire rope length (excluding fittings), which is shorter. If you're comparing prices, make sure you're comparing the same measurement method.
Q: What if I measure wrong?
Contact us as soon as you realize the error. Most orders ship within 2 business days. If you reach us before your order has shipped, we can adjust the specs at no charge. Once a custom cable has been manufactured and shipped, it cannot be returned (it was built to the measurements you provided). This is why we encourage you to email us photos before ordering if you're unsure — it's a free check that takes 5 minutes and prevents a lot of headaches.
Q: I bought a used machine and the cable is completely missing. How do I order?
Use Method 3 — the rope method to trace the cable path. Then email us: (1) your machine brand and model, (2) the rope measurement you got, and (3) photos of both connection points. We'll cross-reference your machine model against our database, compare with your rope measurement, and help you nail the correct length.
Q: Can you just tell me the correct length if I give you my machine model?
Often, yes. Email us your machine brand and model number (usually found on a sticker or metal plate on the frame). We maintain a reference database of common home gym cable specs and can confirm the correct length for many models — especially Weider, Marcy, Body-Solid, Gold's Gym, and Bowflex.
Q9: Do I need to measure the coating separately?
No. Measure the entire cable as you see it — coating included. We manufacture using coated cable of the same overall diameter, so your measurement already accounts for the coating.
Q10: I took photos. Can you just look at them and tell me what I need?
Yes. This is what we do every day. Send clear photos to support@jbryantfitness.com showing: (1) left end fitting, (2) right end fitting, (3) the full cable laid out, and (4) your machine's model label if visible. We'll identify your connector types, confirm your measurement or suggest the correct one, and point you to the right product — all free.
Still Not Confident About Your Measurement?
You're in good company. 70% of our customers ask for help before ordering.
Send your photos to support@jbryantfitness.com. We reply within 12 hours.