The Primer 18” is the ideal choice for riders who’ve outgrown a 16” but aren’t quite ready for a 20”.

The shorter chainstay, 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.

Key Features

• 18" Pro-Style Geometry
• Sunday Freeze Front Load Stem
• 9t Cassette Hub
• Sunday Cornerstone Grips
• Odyssey Springfield Brakes
• FSA Headset
• KMC S1 Chain

Specifications

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, chromoly 
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 
Tires: Sunday Current, 18 x 2.2" (F & R) 
Chain: KMC S1
Approx. Weight: 23.3lbs (with brakes)

Frame Geometry 

Top Tube Length: 18.5" 
Head Tube Angle: 74.5° 
Seat Tube Angle: 71° 
Chainstay Length: 11.7-12.00” 
Bottom Bracket Height: 10.35" 
Standover: 7.5" 

Handlebar Geometry 

Rise: 7.65" 
Width: 25.5" 
Backsweep: 12° 
Upsweep: 1°

*Specs subject to change without notice.