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Customer Experiences

Impact 19" Athmos Unicycle - Black

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Product Description

Impact’s Athmos features all of the small details and performance you'd expect to see at a higher price tag, but offered in an affordable ready to ride trials package.  Durable components will give any rider confidence in choosing the best line you can ride.

  • Features:
  • Saddle: Impact Athmos, with lift handle
  • Seat post: 25.4mm x 300mm steel, welded rectangular mounting bracket, 4 hole - Click Here for Replacement
  • Seat post clamp: Impact (white) single bolt, aluminum
  • Frame: Impact Athmos (black) steel, semi round flat top, stamped bearing clamps - Replacement Not Available
  • Hub/axle: Impact ISIS (white) 36H, high flange, crMo spindle, 100mm center bearing to center bearing - Click Here for Replacement
  • Spokes: 14G stainless black (164mm in length for 3X) with silver nipples - Click Here for Replacement
  • Rim: Impact Athmos (white) 36H, 47mm wide, reinforced eyelets, doublewall, offset spokes, aluminum - Replacement Not Available
  • Rim strip: Rubber - Click Here for Replacement
  • Tube size: Innova 20" x 2.125" - Click Here for Replacement
  • Tire: Bike Trial 19" x 2.5". This is a specific tire for this rim. A regular 20" tire cannot fit this rim. - Replacement Not Available
  • Crank arms: Impact Athmos (black) 140mm, aluminum, 9/16 threads - Click Here for Similar Replacement 
  • Pedals: Wellgo Block (black) steel spindle, plastic, 9/16" threads
  • Bearings 42mm x 22mm - Click Here for Replacement
  • Approx. cycle weight: 13 lbs


  • Recommended leg length sizes for unicycle:
  • Standard seatpost: Minimum - 74cm (29.1"), Maximum - 86.5cm (34.1")
  • Cutdown seatpost: Minimum - 62.5cm (24.6")
  • These sizes are measured from crotch to floor wearing shoes



Minimum Inseam Length:
25" (64cm)
Type - Unicycle:
Type - Seatpost Clamp:
Single Bolt - 25.4mm
Seatpost - Diameter:
Color - Frame:
Color - Rim:
Type - Crank:
Crank Length:
Type - Pedal:
Bearing Size:
Cycle Weight:
13 lbs.
Wheel Size:
19 inch
Write Review

  1. Love it 5 Star Review

    Posted by on Jan 31st 2018

    I've not had a trials uni in almost 12 years... Extremely happy with how far affordable, quality unicycles have come since my days off destroying Savages!

  2. Indestructible 5 Star Review

    Posted by on Oct 18th 2017

    Fantastic for the money and nearly unbreakable for beginner/ intermediate trials. Nice and light and easy to jump around on.

  3. the best for the money 5 Star Review

    Posted by on Jan 10th 2017

    probably the best unicycle I've ever bought at that price. It has a super rigid seat, blazing fast bearings, and a light frame. the only thing that might need to be changed in my opinion when you get it is new pedals. the pedals that come with it aren't bad, they are just not the absolute strongest.

  4. Best unicycle ever 5 Star Review

    Posted by on Oct 6th 2013

    Great unicycle! It is very quality, and it is light. It holds up well also, I have done some pretty decent trials on it and it has handled very well.

  5. Overall a good choice if you're looking for a durable light trials uni 5 Star Review

    Posted by on Sep 22nd 2013

    I was looking for a uni for "old man trials" - learning to hop/drop off of small stuff, ride skinnies, and generally improve my muni skills. I'm not looking to do anything youtube worthy, because I have a job and family and don't want to spend time in the local emergency room. More importantly, I wanted to learn this stuff on a smaller wheel b/c falling off my 26 gets pretty painful after a while, and I don't want to beat the hell out of it while learning to do the stuff mentioned above.

    So, I wanted a durable uni that would not break while I lightly tortured it, but would not break the bank either. I think this one fits the bill nicely.

    It seems well made. The pressed bearing holders look a bit cheezy, but what do you want for the price? Other than that, it seems *really* solid and very well built. I was worried about the 1-bolt seat clamp letting the seat spin on hard wipeouts, but with the knurled seatpost, it hasn't budged a single time. The seat is on as straight as the day I set it.

    The athmos seat is pretty comfortable for dinking around. It's trim, and a bit narrower than my KH freeride seat. It's also more rounded in profile, but the support seems nice, without crunching the family jewels. I wouldn't want to ride miles and miles on this one, though. The padding on top is a bit skimpy. But, that does make it easier to get in and out of the saddle. All and all, I like the saddle for what it was designed for.

    My uni came in at 12.4 pounds, so it's not a featherweight, but it aint a torker DX either. I think it's reasonably lightweight for the money. It feels pretty snappy when pedaling and stopping too. So, no complaints there.

    Overall, if you are looking for a uni that is *signifcantly* tougher than the starter 20" models, don't want to spend big bucks, and you don't need a trials uni that will survive being run over by a car, this one is a good choice. I have no regrets about my purchase.

Product Videos

Impact Athmos 00:54

Тест уницикла Impact Athmos

  • Impact Athmos
    Тест уницикла Impact Athmos

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