2025 Sunday Primer 18" (Gloss Fire Engine Red with 18.5" tt)

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

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.

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:Â Sunday Primer, 18.5" top tube, integrated 1-1/8" head tubeÂ
Fork:Â Sunday Primer, 18" fork w/ 2-piece steerer tube and welded pre-loadÂ
Handlebar:Â Sunday, 2-pieceÂ
Stem:Â Sunday Freeze front load, 48mmÂ
Headset:Â FSA integrated, 1-1/8"Â
Alloy Cap:Â FSA aluminum capÂ
Brake Lever:Â Aluminum, U-brake compatibleÂ
Brakes:Â Odyssey Springfield U-brakeÂ
Brake Cable:Â Odyssey Quik SlicÂ
Grips:Â Sunday CornerstoneÂ
Seat:Â Sunday Badge, seat and post comboÂ
Seat Post:Â IntegratedÂ
Seat Clamp:Â SundayÂ
Sprocket:Â Sunday Sabertooth v2, 25T, steelÂ
Cranks:Â 140mm, 3-piece, chromolyÂ
BB Parts:Â Sealed, Mid, 19mmÂ
Pedals:Â Wellgo platform, plasticÂ
Rims:Â P-7X aluminum, 18", 28HÂ
Front Hub:Â Sunday, 28H, low-flange, loose-ball, 3/8" axleÂ
Rear Hub:Â Sunday, 28H, sealed, 14mm axle w/ 9T DriverÂ
Spokes:Â 14g steel, blackÂ
Tires:Â Sunday Current, 18 x 2.2" (F & R)Â
Chain:Â KMC S1
Approx. Weight: 23.3lbs (with brakes)

Frame GeometryÂ

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

Handlebar GeometryÂ

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