Yes, a speed rope without bearings is fast enough for double unders. A double under needs the rope to pass twice per jump, and that comes from wrist rotation and cable weight, not from friction in the handle. A bearing-free rope turns exactly as fast as your hands do, which is what makes rep forty feel the same as rep four.
By Geraldo Alken, founder and CEO of Elevate Rope. Published 24 August 2026.
What a double under actually demands
Two passes in one jump. Your feet are off the floor for roughly the same time as a single under, so the rope has to move about twice as fast in that window. People assume that means the handle needs to spin freely. It does not. What has to speed up is your wrists.
Watch anyone who strings twenty doubles together. Their jump barely changes height. Their hands are doing something different, tighter and closer to the hips, with the turn coming from the wrist rather than the elbow. That is the whole skill.
Why a bearing makes the timing harder, not easier
A bearing takes friction out of the connection between cable and handle, so the cable can keep turning faster than your arms are moving. In a workout that means the rope arrives slightly before your body expects it. On a single under you get away with it. On a double under, where the margin is a fraction of a second, you find out.
We build without bearings so the cable and your hands stay on the same clock. That is a design decision about rhythm, and the long version of it is in bearing vs bearing-free jump ropes.
What actually makes a rope fast
- Cable diameter. Our Speed Rope MAX runs 5mm PVC over a nylon core. Thin enough to move, thick enough to feel.
- Cable length. The wrong length costs you more reps than any handle ever will. Too long and the cable drags, too short and you clip your head.
- Handle weight and balance. Light handles let the wrist do the work. Heavy handles turn a double under set into a forearm workout.
- Your hand position. Hands near the hips, elbows in. Hands drift out, working length drops, and the rope starts catching your toes.
Setting a rope up for doubles in a WOD
Two things worth doing before your next metcon.
First, size it slightly shorter than your all-purpose length. A shorter cable comes round quicker and needs less air time. Work from the method in our sizing guide and take 3cm to 5cm off. Because there is no metal in the cable, you do that with household scissors and the snaplock inside the handle, in about a minute.
Second, do it while fresh. Sizing a rope after a workout, with tired arms and your hands drifting, gets you a rope tuned to bad form.
Why steel cable is not automatically the answer
Wire cable is faster through the air, and that is genuinely useful at the top end of speed work. What it gives up is feedback. The rope passes without telling you much, so a mistimed rep goes straight into your shins with nothing in between.
We chose PVC over a nylon core because it sits in a place we think suits more people: quick enough for doubles, with enough air resistance that you can feel the rope coming. Customers who came off a steel cable have told us it did not hold its shape as well when swinging. That comparison is set out properly in our jump rope material guide.
If you are still missing reps
It is rarely the rope's top speed. Run through the usual list first, because five of the six common causes have nothing to do with the handle: why you keep tripping on your jump rope. Handle weight and grip are covered separately in jump rope handles explained.
For programming and drills, our CrossFit rope range and the app that comes with every rope have progressions built for exactly this.
Common questions
Do I need a bearing rope for CrossFit?
No. A double under is limited by wrist speed and cable length, not by handle friction. Plenty of people jump well on bearings, but nothing about the movement requires them.
Should a double under rope be shorter?
Generally yes, a few centimetres shorter than your everyday length. Cut in small steps and test each one.
PVC or steel for double unders?
PVC gives you feedback, steel gives you air speed. If you are learning or training mixed sessions, feedback is worth more. If you are chasing a timed speed record, that flips.
What rope do you recommend to start?
The 5mm Speed Rope MAX. If you are still missing more reps than you land, a beaded rope for a few weeks will teach the timing faster than grinding it out on a fast cable.
About the author
Geraldo Alken is the founder and CEO of Elevate Rope. He designs jump ropes and works every day with jumpers, from complete beginners to professionals.