SUNDAY
Sunday 18" Primer Bike
Wheel: 18"TT: 18.5"
Warehouse stock takes 24–48 hours to be ready for pickup.
Not sure about size or compatibility? Ask Blue Groove.
Description
The Sunday 18" Primer is the in-between BMX for riders who have outgrown a 16" but still suit the shorter, easier-to-handle proportions of an 18".
It uses Sunday’s scaled-down freestyle geometry so young riders can learn real BMX skills on a bike that feels like the bigger models they will eventually grow into.
Specifications
Key fit measurements first, followed by the full build detail available for this bike. Variant-specific specifications should be checked against the selected option.
Bike & Fit
- Riding Style:
- Freestyle BMX
- Wheel Size:
- 18"
- Top Tube:
- 18.5"
- Model Year:
- 2025
- Weight:
- 10.5 kg
Frame & Cockpit
- Handlebar Rise:
- 7.65"
- Handlebar Width:
- 25.5"
- Headset Type:
- Integrated
Drivetrain
- Crank Length:
- 140 mm
- Spindle Diameter:
- 19 mm
- Bottom Bracket:
- MID
- Gearing:
- 25T
Wheels & Tyres
- Tyre Size:
- 18 x 2.2"
- Axle Standard:
- Front: 3/8" / Rear: 14 mm
- Hub System:
- Cassette
- Driver Size:
- 9T
- Spoke Hole Count:
- 28
Brakes
- Brake Position:
- Rear
- Brake Mount:
- U-brake / 990
Seating
- Seat Mount:
- Integrated Combo
About SUNDAY
Sunday Bikes launched in 2005 with a clear engineering focus: solve the durability problems BMX frames were experiencing as riding became harder and more technical. The brand became known for putting unusual attention into frame construction, tubing and manufacturing details, then carried that same approach into complete bikes and aftermarket components. Sunday’s range now covers youth bikes through to pro-level completes, frames and parts for modern freestyle BMX, with geometry...
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