11 reviews
Size Chart

All-round performance for gravel sorties and backcountry missions. With no rear pockets it won't fight with your backpack. And its long sleeves provide warmth and shade as the day changes its temper. Bombs away.

  • Stand-up collar for UV protection.
  • UPF 50+
  • Long front zip for maximum venting.
  • No rear pockets to clash with your backpack.
  • Long sleeves protect your forearms from both the sun and the cold (how does it know?).
  • No-elastic hem for warm weather comfort.
  • Designed & made by us in Aotearoa | New Zealand.

  Weight: 190 gm

A lightweight summer fabric packed with technology to keep you cool and dry as. The bi-component knit backs a sharp-looking polyester outer with a smooth layer of nano-charcoal polyester against your skin. Nano-charcoal disperses sweat to accelerate evaporation and is naturally anti-microbial to fight nasty smells. The fabric dries at the speed of light - great when reduced to hand washing on tour - and even performs its quick-drying magic in the wet under a rain jacket.
  • Composition: 75% polyester; 25% nano-charcoal polyester.
+UPF 50
HyperActive's UPF 50+ rating extends your no-burn time by 50 times over bare skin. Designs with a stand-up collar and long sleeves maximise protection from the sun's UV rays. Yank 'em up if it gets too stifling.

Ground Effect tops are cut with extra length in the back... and in the sleeves too. So when you stretch out in search of the perfect downhill position, neither your shirttail or sleeves will ride-up to expose your back or wrists to the elements.

+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.

  Zip Tie  Rock Lobster B52
Pockets Four at rear Three at rear None
Activity Road Mtb & Tour Mtb & Tour
Sleeves Long Long Long
Sizes S - XL S - XXL S - XL

  • 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
4.9 Based on 11 reviews
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Filter Reviews:
    Christopher G.
    Australia Australia
    Great Allrounder

    The B52 is my jersey on my Saturday morning ride, kept me cool on the Kingaroy rail trail and was perfect as a driving shirt on my recent camper van trip. B52 ticks all the boxes on and off the bike .

    Darin B.
    New Zealand New Zealand

    Great top so far. Nice light, breathable and visible too.

    Ian M.
    New Zealand New Zealand

    Bought this for summer/autumn cycling during lockdown and have worn it a bit - but haven't had it long enough to test durability. Comfortable and lightweight and I layer it on the cold autumn mornings. No back pocket - but this is what I wanted as I usually commute with a backpack.

    Anne G.
    New Zealand New Zealand
    B52 no pockets

    The long sleeves, provides sun protection and the light weight fabric is cool enough on hotter days. The fabric is fairly light so most probably that's why back pockets haven't been included. I wear this shirt when on a road bike. The colour is bright enough not to wear a highviz jacket so pockets would be a real advantage because I'm back to wearing both.

    Andrew L.
    New Zealand New Zealand
    B52's the bomb

    I recently spent three weeks this summer touring in Tasmania & wore the B52 every day. It performed admirably in temperatures from 10 to 35 degrees - cool enough to ride long sleeved in the heat (great sun protection) & effective as a thermal layer in the lower temperatures. The cut is comfortable without flapping too much at speed & sizing suits my long arms & back. The deep zip was welcome during sweaty climbs. The only issue is avoiding snags that pull a thread out of the surface knit, I have two such scars now.

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