Move from one gym's cable crossover to another's and your usual weight can suddenly feel twice as heavy or half as light. Nothing is wrong with you, or with either machine. The difference is almost always the pulley ratio: the way the cable is routed between the handle and the weight stack.

What a pulley ratio means

On a 1:1 machine, the cable runs over fixed pulleys straight from the handle to the stack. Pull the handle 1 metre and the stack rises 1 metre. The force you need is roughly the weight of the plates you have pinned.

On a 2:1 machine, the cable passes round a moving pulley before it reaches the stack. That arrangement halves the force you need but doubles the distance: pull the handle 1 metre and the stack rises only 50 cm. This is the same principle as any pulley system, in which you pull more rope in exchange for needing less force (OpenStax, 2020).

The same logic extends to 3:1 and 4:1:

Ratio Resistance you feel Handle travel for each 10 cm the stack rises
1:1 About the full stack 10 cm
2:1 About half the stack 20 cm
3:1 About a third 30 cm
4:1 About a quarter 40 cm

A note on notation: manufacturers write the ratio both ways. Life Fitness lists "3:1" for its Universal Cable, for example, while Matrix lists "1:4" for its Aura functional trainer. Whichever way it is written, divide the stack weight by the larger number to estimate what you feel.

What manufacturers publish

Where manufacturers publish both the stack and the "effective" resistance, the arithmetic matches:

Machine Ratio Stack (as published) Effective resistance (as published)
Life Fitness Adjustable Cable Crossover 2:1 197.5 lb (92.5 kg) per stack 98.75 lb (46.25 kg)
Matrix Varsity Functional Trainer (VY-6044) 2:1 71 kg / 156 lb 35 kg / 78 lb per side
Life Fitness Universal Cable 3:1 2 × 307.5 lb (2 × 153.75 kg) 5 to 102.5 lb (2.3 to 51.25 kg) per side
Matrix Aura Functional Trainer (G3-MSFT3) 1:4 2 × 131 kg / 290 lb 32.9 kg / 72.5 lb per side
Hammer Strength HD Elite Dual Pulldown-Row 1:1 300 lb (136 kg) Not stated; the full stack

Figures are quoted as published on each product page, checked in October 2026. The Matrix figures come from Johnson Fitness & Wellness product pages. The Life Fitness crossover page gives 197.5 lb and 92.5 kg for the same stack, which are not exact conversions of each other, so we quote both as published.

Combined stations can mix ratios. Hammer Strength's discontinued HD Elite Cable Row, for example, lists its row station at 1:1 and its adjustable pulley station at 4:1. Some machines can also be converted: Inflight Fitness sells a 4:1 ratio kit for its FT1000 functional trainer. When you use or buy a cable machine, check the ratio of each station, not just the machine.

Why use a ratio at all?

If 2:1 simply halves the resistance, why not fit a lighter stack? Manufacturers give three reasons, and physics adds a fourth.

  1. Low starting weights and fine steps. A higher ratio makes the first plate and every step lighter at the handle. Life Fitness says the 4:1 ratio on one of its dual adjustable pulleys provides "lower starting resistances for less experienced users", and Matrix describes its 1:4 Aura trainer in similar terms.
  2. Long cable travel. Because the handle moves further than the stack, a tall machine can allow long movements such as overhead presses, rotations and full crossovers without the stack hitting the top. Life Fitness lists 366 cm of cable travel for its 3:1 Universal Cable, and Matrix 457 cm for its 1:4 Aura.
  3. Speed. Matrix describes its ratio trainers as suited to "high-speed, low-inertia exercises", and Life Fitness says its 3:1 Universal Cable supports "both dynamic athletic movements and controlled rehab exercises".
  4. Less inertia. This is the physics behind point three. On a high-ratio machine the stack moves more slowly than the handle, so a quick pull has to get less mass moving and the stack is less likely to bang or bounce.

The trade-off is maximum resistance. A 4:1 machine with a 100 kg stack gives you about 25 kg at the handle. For heavy pulling, such as rows and pulldowns, many dedicated stations stay at 1:1.

Friction and feel

Real machines are not perfect pulley systems. Every pulley and bearing adds a little friction, which works against you as you pull and with you as the stack lowers, and the more pulleys a cable passes over, the more there is. How much depends on the design and, on a pre-owned machine, on the condition of the pulleys, bearings, cables and guide rods. A machine that feels rough or uneven at a light weight usually needs attention.

Cable machines also differ in how resistance changes through a movement. The angle between the cable and your limb changes the load on your joints, which we explain in How strength machines load your muscles.

The lat pulldown and other dedicated stations

People often ask whether a lat pulldown's weight stack shows the "real" weight. On many dedicated pulldown and row stations the answer is close to yes, because they are built at 1:1: Hammer Strength lists its HD Elite Dual Pulldown-Row at 1:1, for example. Selectorized machines with cams or levers are different, because the cam changes the resistance through the range. Treat their numbers as specific to the machine, as we explain in Plate-loaded vs pin-loaded machines. The same applies to leg presses, as we show in How much does a leg press weigh without plates?.

How to compare cable machines

If you train:

  • Compare weights only on the same machine and the same station. A 2:1 crossover at "40" and a 1:1 pulldown at "40" are very different loads.
  • When you change machines, work out the effective resistance (stack ÷ ratio) and start a little lighter, then build up.
  • Note the ratio in your training log next to the weight.

If you run or equip a gym:

  • Label each cable station with its ratio, so members can compare and log accurately.
  • Choose ratios by use. A 2:1 or 4:1 functional trainer suits mixed and athletic training and beginners, while 1:1 stations suit heavy rows and pulldowns.
  • Check the effective maximum. Divide the heaviest stack setting by the ratio and ask whether it is enough for your strongest members' exercises.
  • On a pre-owned machine, confirm which ratio it is set up with, check every cable for fraying and every pulley for smooth, quiet rotation, and follow our inspection guide.

The bottom line

The number on a cable stack is only half the story. Divide it by the ratio to estimate what you actually feel, compare machines on that basis, and remember that higher ratios buy you travel, speed and light starting weights at the cost of maximum resistance.

References

  1. OpenStax. Physics, section 9.3: Simple machines. OpenStax; 2020. openstax.org
  2. Life Fitness. Adjustable Cable Crossover, product specifications, checked October 2026. lifefitness.com
  3. Life Fitness. Universal Cable, product specifications, checked October 2026. lifefitness.com
  4. Life Fitness. Life Fitness Dual Adjustable Pulley (CMDAP), product page, checked October 2026. lifefitness.com
  5. Life Fitness. Hammer Strength HD Elite Dual Pulldown-Row (HDU-DPR), product specifications, checked October 2026. lifefitness.com
  6. Life Fitness. Hammer Strength HD Elite Cable Row (HDLRW), discontinued, checked October 2026. lifefitness.com
  7. Matrix Varsity Functional Trainer 2:1 (VY-6044), product page, checked October 2026. johnsonfitness.com
  8. Matrix Aura Functional Trainer 300 Stack (G3-MSFT3), product page, checked October 2026. johnsonfitness.com
  9. Inflight Fitness FT1000 Functional Trainer 4:1 ratio kit, product page, checked October 2026. johnsonfitness.com

Further reading

This article is general information about training and equipment. It is not medical advice. Speak to a qualified professional before starting a new exercise programme, particularly if you have an injury, a health condition or have been inactive.