Primer Jr. (16″) Previous Model • View Current Bikes »

After revolutionizing 24″ bike geometry, Sunday is now proud to offer the 16″ Primer Jr. (formerly known as The Lil Spark). The progressive spec and angles on this bike make it easier for a new rider to learn the fundamentals of riding BMX at a younger age. Featuring a 16.5″ top tube, steeper 25mm fork offset, taller 6.75″ bars, a 40mm reach stem and lightweight 28 spoke wheels, the Sunday 16″ Primer Jr. is the perfect starting point for new riders. The awkward geometries found on other 16″ bikes are now a thing of the past. The 2013 Sunday Lil Spark is the best handling 16″ bike that money can buy.


Frame: Chromoly DT & Dropouts
Fork: Chromoly steerer tube w/ welded pre-load thread insert
Handlebar: Lil’ Spark, Hi-Ten steel, 6.75" H, 23" W, 12° backsweep, 1° upsweep
Stem: 40mm Reach Top-Load
Headset: Integrated, 1 1/8"
Brake: Odyssey Springfield
Brake Lever: Junior Reach aluminum
Brake Cable: Sunday
Grips: Junior
Seat: Junior seat and post combo
Seat Post: Integrated
Seat Clamp: Sunday
Sprocket: Sunday Steel, 25-T
Cranks: 3-Piece Tubular Chromoly, 140mm
Bottom Bracket: 19mm Sealed Mid
Pedals: Wellgo
Rims: Single Wall, 28-H
Front Hub: Looseball 3/8" axle, 28-H, Low Flange
Rear Hub: Sealed Cassette, 14mm, 28-H, 9-T
Tires: Duro 16" x 2.10" Front and Rear
Chain: KMC Z410H
Weight: 20.7 lbs

*Specs subject to change without notice.


Head Tube Angle: 74.5°
Seat Tube Angle: 71°
Bottom Bracket Height: 9.25"
Chainstay Length: 10.625"