Do Hard Things™ - Spark Kit

$ 29.99 Regular price
Unit price

Free USA shipping on orders over $45. Shipping calculated at checkout.


New to CrossFit and you're looking to improve on those elusive double unders? This Spark kit is our recommended starting place for anyone new to double under jumping.

Ultra light ergonomic handles at 0.6oz reduce forearm fatigue while you're practicing, and we've included three different cord types (at different thickness and speed) to help you progress from your first double unders to long sets of 50+.

Prefer bigger handles? Try our REP Rope progression bundle, which is also designed for beginners but offers a heavier, longer aluminum handle often preferred by people with bigger hands.


  • 1/8" PVC Coated Beginner Cable: This is our recommended starter cable for learning double unders. It's thicker than standard speed cables, helping to "slow" the rope so you can feel and develop a rhythm. The PVC coating also makes it more flexible than the steel cables, meaning it hurts less when you miss... Made in the USA.
  • 3/32" Nylon Coated Speed Cable: This is the standard speed cable used in most double under jump ropes. Nylon coating ads durability to the cable for longer use. Progress to this cable after 25 unbroken double unders with the 1/8" cable. Made in the USA.
  • 1/16" Bare Cable: An uncoated steel cable that is thinner and lighter than the other ropes, making it much faster. It "cuts" through the air quickly. Progress to this rope once you've mastered 50 double unders unbroken with the 3/32" cable and set a new personal best. Made in USA. 

Handle Specs: 0.6oz weight each / 5.35" length / diameter at widest part: 0.87"

Sizing: Cable comes in a 10 foot length. Will fit anybody up to 6' 4" tall. Cut off the extra cable after adjusting with the adjustable screw/collar system. 

Handles accept cable diameters up 3.2mm and everything thinner. Purchase additional cables separately. 

  • Same Day Shipping

    We ship same day on orders placed by 11am PST and next day on orders placed after 11am PST. Orders placed on the weekend (after 11am Friday, PST) ship on Monday. Estimated Delivery Times.

  • USA Customer Service

    We are easy to get in touch with over the phone or email. Have a question or an issue? We can be reached M-F 8am to 5pm PST.  Contact us.

  • Quality Guarantee

    We make premium quality products for the best athletes in the world, and we guarantee our products 100%. Within the 1 year warranty we will refund, repair and /or replace parts or products that are defective in materials or workmanship.

  • Get it Customized

    We make most of our products to order, and we offer a range of customization options for your gym, business or personal use, from custom colors to adding logos or sayings on your handles. Contact us to learn more.

Jump Smarter

We recommend using a jump rope mat to reduce impact on your joints and to extend the life of your jump rope, especially on hard outdoor surfaces.

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