12 reviews
Size Chart

A down-sized version of the big-boys' Supertankers. Bulletproof baggy shorts for hitting the pump track, playing bullrush or falling off ya scooter. The stretch lumbar panel and gusseted crutch ensure cycling comfort. Combine with the kids' Dynamos for increased performance. Hoo-hah!

  • Heavy duty Hi-Impact Plus™ fabric takes the knocks.
  • Easy-Rider™ stretch lumbar panel.
  • Smooth fitted waist with adjustable waist strap.
  • Gusseted crutch for pedalling freedom.
  • Combine with kids' Dynamos for increased performance.
  • Open hand pockets plus rear patch pocket.
  • Long legs hang around your knees.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 170 gm

+More than Kiwi Made
Ground Effect clothing is crafted right here in New Zealand. Has been ever since we started back in 1994. Manufacturing locally works for us. We operate a quick-response system - holding minimal stock of any one item, but churning out a few more quick-smart when the pile gets low. The upshot is that we are seldom caught with our shelves empty, so orders get despatched the same day you place them.


  • All Ground Effect clothing enjoys a warm 40ºC machine wash. Try to avoid cold-water detergents and those with bleach, 'oxygen whitener' or fabric softener.
    • The cold-water varieties have little enzymes that are super-charged to brave the cold but can damage technical fabrics and cause skin irritation. 
    • Bleach rots natural fibres like merino, strips the dye, attacks laminates of waterproof fabrics and can also cause skin irritation.
    • Sodium Percarbonate (the main ingredient in oxygen whitener) can make colours run.
    • Fabric softener and stuff containing it like wool wash destroys the water repellent finish on waterproof and water resistant fabrics, and can cause colours to run. 
  • As a rule of thumb, a product that is easy on the planet is also easy on your body. Select a mild plant-based soap like EcoverEcostoreEarthwise or Aware.
  • Hand washing is sometimes the only option on tour, but a washing machine rinses more thoroughly and is preferable if you have the choice.
  • Most Ground Effect gear dries super-fast so hanging on the line or drooping over the bedpost is generally the best option. High heat can damage some fabrics so if you do take your threads for a spin, set the device on 'medium' or 'warm' rather than hot. A lap in the dryer is recommended for your rain jacket, after it has dried on the line, as it helps recharge its water repellent finish. 

Customer Reviews
4.8 Based on 12 reviews
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Filter Reviews:
    Robert S.
    Australia Australia

    These shorts were purchased for my grandson and he loves them they have been comfortable from the first time he wore them and if allowed he would wear them everywhere

    Katja B.
    Australia Australia
    Perfect Baguettes

    Got a XS for my daughter. Skinny 7 years old, ( 120 cm, 21 kg ) a loose fit to grow into but she is very happy with it. The stretch/strap works well around the hip. And there is room for some leggings to wear under. Length is like a 3/4 at the moment. And the fabric is durable and easy to wash & dry. YES, definitely to recommend !

    Cassie N.
    Australia Australia
    Great Shorts

    My son loves these shorts. We just purchasrd a second pair recently at my sons request cause he loves them so much.

    James N.
    New Zealand New Zealand
    kids bike shorts

    Amazing biking shorts, they are so comfy and fit me well. I like them a lot.

    Gillian C.

    Heavy duty - great fit - after many online purchases of kids mtb shorts that were too big or bright, these are the an absolute gem fir on and off the trails...even have been worn to bed! Great match with kids enduro top too

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