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19" Impact Reagent Pro Unicycle - White (32mm)


The Reagent is Impacts flagship Street and Flatland unicycle. Combining latest technologies with years of rider’s experience.

For more information about this product check out impactunicycles.com. Here are the Build Instructions for this Unicycle, and some important Assembly Advice

Primary Discipline: Street, Flatland
Secondary Disciplines: Trials

The Reagent is Impact’s all-round urban unicycle. Featuring a square crown frame ideal for coasting and wheel walk based tricks, this unicycle can also be used for trials and street thanks to its 19” wheel.

Sporting 130mm cranks, this unicycle is ideal for all-round riding, and can be modified with 118mm cranks for smoother flatland lines, 130mm Groovy cranks for flips and rolls, or 140mm Eiffel cranks for Trials. (For pure flatland riding, the Impact Sylph unicycle may be an appropriate alternative)

This unicycle is available with both 32mm (Reagent Pro) and 42mm bearings (Reagent).

– 32mm bearings are Impact’s performance bearing, providing a dramatic decrease in weight, as well as added stiffness. As a performance product, these bearings require maintenance and have a shorter life than 42mm bearings.

– 42mm bearings are used on almost all mid-professional tier unicycles. Although heavier than 32mm bearings, these bearings offer reliability and increased compatibility for other brand’s frames.

Saddle: Impact Naomi Unicycle Saddle – White
Seatpost: Impact ‘ALLinONE’ Seatpost 300mm (27.2mm)
Seatclamp: Impact ’2 Bolt’ Seatpost Clamps – Black (31.8mm)
Frame: 20′ Impact Reagent/Sylph Pro Frame – White (32mm)
Hub: Impact  ISIS CrMO 36 spokes – White (32mm)
Cranks: Impact EiffelTower Cranks – 130mm (2012 Version)
Pedals: Impact All Bran Pedals – White
Spokes: Stainless Black ED Finish
Rim: Impact 47mm Wide Rim – Black
Rim Tape: Black
Tyre: Maxxis Creepy-Crawler Tyre – 20′ x 2.5′

Weight: 4.6kg

Recommended leg length sizes for unicycle:
Standard seatpost: Minimum - 72cm (28.3"), Maximum - 86cm (33.9")
Cutdown seatpost: Minimum - 62cm (24.4")
These sizes are measured from crotch to floor wearing shoes

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   Frequently Asked Questions and Answers

  • General Unicycle maintenance

    Unicycles are not complicated but they do take a little bit of maintaining. Here are some of the key points:

    Creaking Cranks

    Stop riding immediately and tighten! If these are left they will destroy the cranks and hub. The creak comes ...
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  • Impact Unicycle Instructions

    Please select your Unicycle from the list below.

    All our instructions are PDF based, you will need a PDF viewer to use the links below. We recommend Adobe Acrobat Reader, which is a free, trusted global standard for viewing PDFs. You can downlo...
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  • Impact Unicycles Manufacturers Page

    Impact Unicycles is the best manufacturer in the world for trials and flatland unicycles. Although the brand was started in 2009 by the famous French rider Yogi. It is now wholly owned by Unicycle.com. Designed by unicyclists, ridden by world champions...
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