SE Bikes Ripper 20-inch BMX bike — a compact Bike Life setup with two pegs included:

Key features

• Suggested rider height: Approx. 145–160 cm
• Wheel size: 20 in
• Top tube length (TT): 20 in
• Frame: 6061 aluminium
• Fork: SE Landing Gear, 4130 chromoly
• Rear hub: SE Racing Alloy flip-flop, fully sealed
• Brake: Promax V-brake
• Pegs: Two SE Bike Life Wheelie pegs included
• Weight: Approx. 10.56 kg

A smaller Bike Life setup

The Ripper brings SE’s BMX and wheelie-bike layout to 20-inch wheels. A 6061 aluminium frame, 20-inch top tube and 7-inch-rise bar give younger riders a compact setup to consider for riding with friends and practising wheelies in a suitable riding area. Two SE Bike Life Wheelie pegs are included.

Set your riding position

The Race Rocker Micro-Adjust seatpost lets you adjust the saddle position within the saddle and post limits. Check your reach to the 25.5-inch-wide bar and make sure you can operate the Promax brake lever comfortably. The suggested rider height is around 145–160 cm, so use that as a starting point rather than a guarantee of fit.

The 20-inch top tube describes the frame length; the wheels are also 20 inches. The 10.2-inch seat tube measurement runs from the bottom bracket to the top of the seat tube, not from the ground.

Pedal, coast and brake

The 170 mm SE Racing Alloy cranks drive a 38T chainring and 14T freewheel. It is a single-speed setup with no shifters to operate. The freewheel lets you coast without turning the pedals, and the Promax V-brake is operated by a two-finger aluminium lever.

The build includes a 4130 chromoly Landing Gear fork and Wing Bar, Alex C1000 rims and Vee Tire Co x SE Racing Cub 20 x 2.0-inch tyres. SE Bike Life grips with rubber end plugs and nylon fibre platform pedals complete the contact points.

SE Bikes Ripper 20-inch BMX bike — specifications:

Sizing, weight and other details:

• Suggested rider height: Approx. 145–160 cm
• Wheel size: 20 in
• Pegs: Two SE Bike Life Wheelie pegs included
• Weight: Approx. 10.56 kg

Frame geometry:

• Top tube length (TT): 20 in
• Chainstay length (CS): 14.8 in
• Head tube angle (HA): 74°
• Seat tube angle (SA): 71°
• Bottom bracket height (BB): 12 in
• Seat tube height (SO, bottom bracket to top of seat tube): 10.2 in

Frame:

• Frame: 6061 aluminium

Fork:

• Fork: SE Landing Gear, 4130 chromoly
• Fork size: 20 in

Rear hub and driver:

• Rear hub: SE Racing Alloy flip-flop, fully sealed
• Rear hub details: SE Racing Alloy flip-flop, 14 mm chromoly axle, fully sealed, 36H

Brakes and controls:

• Brake: Promax V-brake

Handlebars:

• Bar: SE Wing Bar, 4130 chromoly; 7 in rise, 25.5 in width; 11° backsweep, 3° upsweep

Cranks:

• Cranks: SE Racing Alloy, 170 mm

Chainring or sprocket:

• Chainring: 38T

Bottom bracket:

• Bottom bracket: Euro, 19 mm, cartridge bearings

Drivetrain:

• Freewheel: 14T
• Drivetrain: 38T / 14T freewheel

Chain:

• Chain: KMC S1

Wheels and rims:

• Rims: Alex C1000, 20 in, 36H

Tyres:

• Tyres: Vee Tire Co x SE Racing Cub, 20 x 2.0 in

Front hub:

• Front hub: SE Racing Alloy, 10 mm (3/8 in) chromoly axle, 36H

Brake levers:

• Brake lever: Promax two-finger, aluminium

Saddle and seatpost:

• Saddle: SE Ripper with Super Grippy top cover
• Seatpost: Race Rocker Micro-Adjust, aluminium, 27.2 mm
• Seat clamp: Aluminium, 31.8 mm

Pedals:

• Pedals: SE Nylon Fiber platforms

Grips and bar ends:

• Grips: SE Bike Life with SE rubber end plugs

Safety while riding

BMX and wheelie practice put loads through the bike. Falls and impacts can damage components. 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