2025 Sunday Primer 18

The Primer 18” is the ideal choice for riders who’ve outgrown a 16” but aren’t quite ready for a 20”. The shorter chain stay, lighter wheels and size-specific, pro-style frame geometry makes it the go-to bike for serious BMXers in this size range. The Primer is packed with quality parts like Odyssey Springfield brakes and a fully sealed cassette hub for reliability that you can count on every time.

Frame: Sunday 'Primer', 18.5" top tube, integrated 1-1/8" head tube 
Fork: Sunday 'Primer', 18" fork w/ 2-piece steerer tube and welded pre-load 
Handlebar: Sunday, 2-piece 
Stem: Sunday 'Freeze' front load, 48mm 
Headset: FSA integrated, 1-1/8" 
Alloy Cap: FSA aluminum cap 
Brake Lever: Aluminum, U-brake compatible 
Brakes: Odyssey 'Springfield' U-brake 
Brake Cable: Odyssey 'Quik Slic' 
Grips: Sunday 'Cornerstone' 
Seat: Sunday 'Badge', seat and post combo 
Seat Post: Integrated 
Seat Clamp: Sunday 
Sprocket: Sunday 'Sabertooth v2', 25T, steel 
Cranks: 140mm, 3-piece, Cr-Mo 
BB Parts: Sealed, Mid, 19mm 
Pedals: Wellgo platform, plastic 
Rims: P-7X aluminum, 18", 28H 
Front Hub: Sunday, 28H, low-flange, loose-ball, 3/8" axle 
Rear Hub: Sunday, 28H, sealed, 14mm axle w/ 9T Driver 
Spokes: 14g steel, black 
Tyres: Sunday 'Current', 18 x 2.2" (F & R) 
Chain: KMC S1
Approx. Weight: 10.5kgs (with brakes)