2024 Sunday Primer 18"

$409.99

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.

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°

By Sunday
Color: Fire Engine Red
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Fall is the best time of year to catch some laps in the woods. The temps are perfect and the trails are running fast. @elih401 making a classic table look good in the woods of RI. #circuitbmx #rhodeisland
What do you do when you come out of BMX retirement? You build your dream bike! That’s what we just dude for @nicholashennigar This is a proper @sandmbicycles @irodetoday Rambler decked out with a @profile_racing drivetrain. Thanks for the support Nick!! #circuitbmx #supportyourlocalbmxshop
I’ve been laughing and riding with Don Houle @houlesdoingthings for almost 35 years and I hope to keep doing that for the foreseeable future. Stoked to call Don a friend and to build him up his new @sandmbicycles @credence_bikes @over_roast rig. #circuitbmx #donhoule
Not all rigs are the same. This one is built different. @sandmbicycles @moeller_chris out the door today and ready for some summer fun. #circuitbmx #maddog
@klegraefe Spot Master, Wizard Biker!! #circuitbmx
The stoke runs deep with @timmy_ike13 and this Circuit Woodsman Build. Now that’s a bike!! Should we do another run of Woodsman Frames? #circuitbmx
@krobjrbmx made the move out to Southern California a month ago and he has been making the most of it. Stoked to see what’s to come from this dude. Keep killing it Kev!! #circuitbmx
Marley brought everyone together to celebrate the unofficial start of summer. #hennybadger did a turndown to celebrate his 40th year on earth and to make sure his legs are still working.It’s always BMX Celebration in the Green Mountains. 📸 @cappsie @cappsphoto #circuitbmx #vermont
We are always stoked to get a New England Bad Boy back on the rig. @philmuolotattoo with the perfect @sandmbicycles @credence_bikes MOD build. Thanks for the support Phil! #circuitbmx
All eyes on @krobjrbmx taking the high air at @florideahswampfest This kid is always on 11. #circuitbmx #floridaswampfest2024 📸 @cappsie
Sometimes you need a new rig to get you stoked for trail season. @brad_fardy with his new @sandmbicycles ATF getting ready to rip for 2024. #circuitbmx #trailsrule
We will have a restock of softgoods in about a month including this “No Brains” long sleeve shirt. Stoked on this one. Spring is around the corner. Get stoked!! #circuitbmx #nobrainsallheart
The time has come!! Another batch of Circuit Frames will go into production for this coming season. We present to you the Circuit Woodsman Frame. Built for smooth cruising or big blasting. We are stoked to have these made in the USA by @sandmbicycles Swipe for geometry and color options. Tap the photo for pre book link. #circuitbmx #woodsmanbmx (20.27 is a typo- 20.75 is the correct size. It’s correct on the store)
Another year well spent doing what we love. Here’s to 2024!! Thanks to everyone that has supported us through the past 17 years. #circuitbmx #trailsrule #rhodeisland
On this day, the day of your birth we give you the promise of many sweaty and smelly days in a van, traveling with a group of people that have the same love and passion for bmx that you have. Welcome to the party!! @krobjrbmx Happy Birthday #circuitbmx #getinthevan 📸 @cappsie #weekendatmarleys #newenglandbmx
It’s that special time of year when ask for your support to carry us though the slow winter months ahead. Supporting your local BMX should be a no brainer but sometimes it has to be said. Since we love you guys so much we are offering 15% Off site wide and store wide starting Nov 20-27. Use code CIRCUIT15. If you see it in store or online it’s 20% off. We will also match any price you see online if the item is in stock. Ready, set, go!! Thank you for the support over the past 17 years. #circuitbmx #supportyourlocalbmxshop
Just wrapped up a few days of touring around with @markmulville we hit as many local trail spots as possible in a 4 day period and unfortunately got rained on on our last day. We still had a blast. If you know Mark then you know he’s a beacon of light with endless positive energy. Keep an eye out for a @profile_racing / @circuit_bmx_shop Trails Edit in the near future. Here’s a shot from an evening sesh at @wethersfield_woods Thanks to @high_sodium401 for opening up the place for us. #circuitbmx #dudesinthewoodz
@elih401 getting loose on his new Rooster build. Keep an eye out for a pre book on another run of Circuit Frames this Fall/Winter. 📹 @houlesdoingthings #circuitbmx #walkerwoods #woodsman
If you spend a lot of time in the woods alone, you’re going to form some weird friendships with inanimate objects. The most durable dude in the woods has to be your “Barrow Buddy” I’ve been using mine for 15 plus years and he’s still going strong. Everyone needs a good push!! Thanks to Mr Zuppani for bringing my ideas to life. #circuitbmx #dudesinthewoods We also have some @drop_in_coffee available with buddy to get you stoked for those morning sessions.
One way or another you know @codydiggs will be ripping lips!! Surfs up in the back woods of RI. #circuitbmx #endlessdeah #dudesinthewoods