The Radio Saiko 18" BMX Bike is designed for younger riders who want to learn their first BMX tricks. With 18" wheels, compact geometry and a durable frame, it offers better control and confidence while riding at the skatepark, pump track or during everyday sessions.

Radio Saiko 18" – Key Features

• Recommended rider height: approximately 135–149 cm
• Frame size: 18"
• Frame: Hi-Ten 1020 steel with 4130 Cr-Mo down tube
• Handlebar: 7.9" rise / 26.5" width
• Cranks: 3-piece 4130 Cr-Mo
• Tyres: Salt Tracer 18" × 2.2"
• Weight: 10.62 kg
• Skill level: Beginner / Intermediate

A BMX That Makes Learning Easier

The Radio Saiko 18" is built for younger riders who are not quite ready for a full-size 20" BMX. The smaller frame, compact geometry and 18" wheels make the bike easier to control, helping riders build confidence from their very first sessions.

It is an excellent choice for learning bunny hops, manuals and other basic BMX tricks. Whether riding at the skatepark, on a pump track or simply practising every day, the Saiko provides predictable handling that helps riders progress naturally.

The frame combines Hi-Ten 1020 steel with a stronger 4130 Cr-Mo down tube, increasing durability where it matters most while keeping the overall weight low enough for younger riders.

Built for Young BMX Riders

The Radio Saiko features a durable three-piece 4130 Cr-Mo crankset that delivers greater strength and stiffness than entry-level one-piece crank designs.

Salt Tracer tyres provide dependable grip on different surfaces, while the cassette rear hub with a 9T driver improves pedal response when practising tricks. The aluminium Radio AM U-Brake gives reliable stopping power whenever needed.

What Size Should You Choose?

The Radio Saiko comes with an 18" frame and is recommended for riders approximately 135–149 cm tall. It is the perfect step up for children who have outgrown a 16" bike but are still too small for a full-size 20" BMX.

You can find the complete frame geometry in the geometry diagram at the bottom of this description.

Ride Safe

Learning BMX tricks always involves the risk of falls. A properly fitted helmet and quality protective gear help reduce the risk of injury and allow you to ride with greater confidence.

Radio Saiko 18" – Full Technical Specification

Frame

• Radio Saiko 18"
• Hi-Ten 1020 steel
• 4130 Cr-Mo down tube
• Gyro (Rotor) compatible
• Top Tube: 18"
• Chainstay: 12.2"
• Head Angle: 75°
• Seat Angle: 71.5°
• Bottom Bracket Height: 10.75"
• Standover Height: 7.5"

Fork

• Radio Saiko 18"
• Hi-Ten 1020 fork legs
• 4130 Cr-Mo steerer tube
• Tapered fork legs

Handlebar

• Radio Saiko 18"
• Hi-Ten 1020 steel
• Rise: 7.9"
• Width: 26.5"

Stem

• Salt Junior
• Aluminium
• Top Load

Headset

• Salt Pro
• Integrated

Wheels

• Radio AM rims
• 18"
• 36H

Tyres

• Salt Tracer
• 18" × 2.2"

Crankset

• Radio Rookie Tubular
• 4130 Cr-Mo
• 3-piece
• 152 mm

Bottom Bracket

• BMX standard

Sprocket

• Radio Vision
• 25T

Front Hub

• Radio AM
• 10 mm (3/8") Cr-Mo axle
• 36H
• Ball bearings

Rear Hub

• Radio AM Cassette
• 14 mm Cr-Mo axle
• 9T driver
• 36H
• Semi-sealed bearings

Chain

• Salt AM
• WZ1

Brake

• Radio AM U-Brake (rear)
• Aluminium

Brake Lever

• Radio AM

Seat

• Radio Century Slim
• Combo

Seatpost

• Integrated Combo design

Pedals

• Radio Pro
• Nylon with fiberglass
• 9/16"

Grips

• Radio AM
• Flangeless
• 150 mm

Weight

• 10.62 kg

Frame geometry:

• Top Tube (TT): 18"
• Chainstay (CS): 12.2"
• Head Angle (HA): 75°
• Seat Angle (SA): 71.5°
• Bottom Bracket Height (BB): 10.75"
• Standover Height (SO): 7.5"
• Handlebar Rise: 7.9"
• Handlebar Width: 26.5"
• 1" = 2.54 cm

BMX bikes are regularly exposed to heavy impacts from jumps, landings and tricks. No freestyle bike is indestructible. Regularly inspect the frame, fork, wheels, drivetrain and all bolts. Routine maintenance improves safety and helps extend the lifespan of your bike.

Important Information About Your New BMX Bike

• Read the warranty conditions supplied with your bike before your first ride.
• Your bike is delivered approximately 90% assembled.
• Before your first ride, install the pedals, handlebar, seat and, if required, the front wheel.
• The manufacturer recommends having the bike inspected by a professional bicycle workshop before the first ride. This service is chargeable. The inspection is required to keep the manufacturer's warranty valid. Keep your service receipt.

Important

Before riding your new BMX bike, have it checked by a professional bicycle workshop. The initial inspection removes any assembly-related play, ensures all components are correctly adjusted and is required to maintain the manufacturer's warranty.

FAQ – Radio Saiko 18"