SE Bikes Gaudium 20-inch BMX bike — a 21-inch frame for street and skatepark riding:

Key features

• Suggested rider height: Approx. 175 cm and above
• Wheel size: 20 in
• Top tube length (TT): 21 in
• Frame: 100% 4130 chromoly
• Bar: 4130 chromoly, 9 in rise, 30 in width
• Cranks: Three-piece chromoly, 175 mm
• Weight: Approx. 11.29 kg
• Riding style: Street and park
• Rider level: Intermediate to advanced

Choose a frame that suits your riding position

The Gaudium has a 21-inch top tube, 13.7-inch chainstays and a 75° head tube angle. Compare those measurements with your current BMX when choosing a street and park setup. The suggested rider height is around 175 cm and above, but check reach and frame clearance too.

The 21-inch measurement is the frame’s top tube length. The wheels are 20 inches, with 2.4-inch tyres. A 9-inch-rise, 30-inch-wide bar gives you another useful measurement to compare before choosing.

Frame, fork and drivetrain

The frame and fork use 100% 4130 chromoly, with butted fork legs. The build has 175 mm three-piece chromoly cranks, a 19 mm Mid bottom bracket with cartridge bearings and a sealed cassette rear hub. The cassette requires back-pedalling when you roll backwards.

A frame prepared for a gyro

The frame is prepared for a gyro, giving you an option to consider if you want to change the brake cable setup. That preparation does not mean a gyro is included. Have the correct parts and cable routing checked before making changes.

The Gaudium has a U-brake with a two-finger lever, Alienation rims, SE DSP grips and nylon pedals. Check the brake adjustment and inspect the bike before each session. Choose obstacles suited to your ability and the bike’s intended use.

SE Bikes Gaudium 20-inch BMX bike — specifications:

Sizing, weight and other details:

• Suggested rider height: Approx. 175 cm and above
• Wheel size: 20 in
• Weight: Approx. 11.29 kg
• Riding style: Street and park
• Rider level: Intermediate to advanced

Frame geometry:

• Top tube length (TT): 21 in
• Chainstay length (CS): 13.7 in
• Head tube angle (HA): 75°
• Seat tube angle (SA): 71°

Frame:

• Frame: 100% 4130 chromoly

Handlebars:

• Bar: 4130 chromoly, 9 in rise, 30 in width

Cranks:

• Cranks: Three-piece chromoly, 175 mm

Brakes and controls:

• Gyro compatibility: Frame prepared for a gyro
• Brake: U-brake

Fork:

• Fork: 100% 4130 chromoly, butted legs

Stem:

• Stem: Aluminium, top load

Wheels and rims:

• Rims: Alienation, 36H

Tyres:

• Tyres: 20 x 2.4 in

Bottom bracket:

• Bottom bracket: Mid, 19 mm, cartridge bearings

Chain:

• Chain: KMC S1

Front hub:

• Front hub: Sealed bearings, female axle

Rear hub and driver:

• Rear hub: Cassette, sealed bearings, 14 mm axle

Brake levers:

• Brake lever: Two-finger

Saddle and seatpost:

• Seatpost: Pivotal
• Seat clamp: Integrated

Grips and bar ends:

• Grips: SE DSP

Pedals:

• Pedals: Nylon

Safety while riding

Freestyle BMX riding puts high loads through the bike during tricks, jumps and landings. No bike is indestructible: parts can wear out or become damaged. Check the frame, fork, bars, wheels, axles, cranks, pedals, brakes and bolted connections before every ride. Inspect the bike after a hard impact and stop riding if you find looseness, cracks or damage. Have any problem checked and repaired before riding again.

Wear a properly fitted helmet and suitable protective pads. Read our important information before buying and riding a BMX bike for assembly, servicing and riding checks.

Important information about your new bike

• Read the instructions and warranty supplied with the bike before riding.
• The bike is delivered approximately 90% assembled for shipping.
• Before the first ride, fit the pedals, saddle and handlebars, and the front wheel where required. Follow the assembly instructions and check all components.
• Have a professional bike workshop carry out a pre-ride inspection. This is a paid service; keep the receipt as proof for the manufacturer’s warranty and follow the warranty terms supplied with your bike.

The manufacturer’s warranty is separate from your statutory consumer rights. Continue to inspect and service the bike throughout its use.

Frame geometry diagram