Comas Zero Evo 20" 920mm Bike

Comas Zero Evo 20" 920 mm Bike

Has your child already mastered their 18" trials bike? Are they ready for something bigger but not quite tall enough for an adult bike? The Comas Zero Evo 20" is exactly what you need.

With its vibrant fluorescent yellow colour and updated graphics, this bike isn’t just eye-catching—it’s designed for young riders between 1.20 m and 1.40 m tall. Lightweight, durable, and easy to handle, it’s perfect for learning and improving without frustration.

It’s equipped with hydraulic disc brakes that not only provide precise stopping power but are also ideal for small hands. They’re smooth to operate and don’t require much force, ensuring comfort and control every time.

If you’re looking for quality, safety, and a bike that will support your child’s first steps into trials, this is it. Because they deserve to start off on the right foot—or better yet, with the right wheels.

Components and Technical Specifications

Frame and Fork
- Frame: Comas Zero 20”, Features a headtube, for 1 1/8” headsets, Post Mount disc brake mounts , Fluorescent yellow color.
- Fork: Comas Entry 20”, 1 1/8”, Post Mount disc brake mounts, BLACK COLOR.

Wheels
- Front hub: Comas Entry Disc 28 spoke holes, with rotor mounts, 100 mm spacing, anodized black.
- Rear hub: Comas Entry Disc 32 spoke holes, with rotor mounts, 116 mm spacing, anodized black.
- Chain tensioner: Comas snail cams, black.
- Front rim: Comas 20'', single wall, 32 mm wide, 28 spoke holes, anodized black.
- Rear rim: Comas 20”, single wall, 32 mm wide, 32 spoke holes, anodized black.
- Spokes: Comas 13G (1.8 mm), made of steel, black.
- Nipples: Aluminium 13G, black.
- Rim tape: Comas, white.
- Front inner tube: Comas 20”x 1.75.
- Rear inner tube: Comas 20”x 1.75.
- Front tyre: Innova 20”x2.25”.
- Rear tyre: Innova 20”x2.25”.

Brakes
- Front brake: Tektro hydraulic  disc brake 160 mm, Post mount.
- Rear brake: Tektro hydraulic disc brake 160 mm, Post mount.
- Rotors: Comas Race 160 mm.

Drivetrain
- Cranks: Comas JIS (square), 160 mm long.
- Bottom bracket: Comas JIS (square), 124.5 mm axle.
- Freewheel: Comas 30.6 18T, with 30.6 engagement points, 18 teeth.
- Chain: YBN S20, 1/2x3/32”.
- Rear sprocket: Comas 15T Screw-on, Aluminum 7075-T6.
- Pedals: Plastic pedals (we recommend replacing them for some higher quality pedals).
- Bashring: Comas ultralight bashring, anodized black.

Steering
- Headset: Comas 1 1/8" internal , black.
- Stem: Comas 20º, 130 mm x 20º, 31.8 mm Oversized handlebar diameter, black with white Comas graphics.
- Grips: Comas rubber grips.
- Handlebar: Comas 7075, 720 mm long, 115 mm rise, 31.8 mm Oversized handlebar diameter, black with white Comas graphics.

Geometry (based on Comas fork 370 mm and +40 mm offset).

(1) Wheelbase: 920 mm
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(2) Rear End: 327 mm
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(3) Bottom Bracket Height: +55 mm.
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(4) Head Angle: 72°.
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Weight
- 8,780 Kg ( With plastic pedals at 342 g).

Additional information:
The list of components may change. Any changes on the components will be communicated to the customer before delivery, ensuring the component replaces is of the same or higher quality than listed.

The photos shown on the product page correspond to the Comas Zero Factory model. Please read the specifications carefully, so please read the description carefully.

This bike is partially set up by our workshop, so the customer will only have to front wheel, pedals, and the headset up.

If you have any doubts, please contact to info@trial-bikes.com.