Category Archives: BMX Bikes

BMX Groms Sunday Primer 16″ and 18″ BMX Bike Reviews


Sunday Primer 16 and 18 inch BMX Bike Review

Nathan Halahan cranks a turndown on the 16" Sunday Primer BMX

Nathan Halahan cranks a turndown on the 16″ Sunday Primer BMX

While scanning through the long list of Google search terms which brought people to the other day, this one caught my eye: “how old do u half to be to be able to ride bmx bike”? The answer is, if you are old enough to type a search phrase into Google, you’re definitely old enough to ride BMX, you just need the right size bike.  Sunday is a company that is taking creating bikes for smaller riders seriously, because they understand how important it is. So many kids fail at BMX, when their parents buy them a full size 20” bike that they can grow into. From frame geometry to components, they’ve thought of everything and Sunday has kept the cost down.

Mike Halahan is one of the most hardcore BMX Dad’s out there. The two Halahan boys, Lukas and Nathan show what 8 and 10 year olds can do on a BMX, when the bike is a size they can handle. The following independent review of the Sunday Primer 16” and 18” BMX bikes couldn’t have been done by anyone better. Thanks Mike Halahan!

Sunday Primer 16 & 18

Lukas Halahan tweaks a t-bog on the Sunday Primer 18" BMX in the Woods jump line at the wheelmill.

Lukas Halahan tweaks a t-bog on the Sunday Primer 18″ BMX in the Woods jump line at the wheelmill.

Review by Mike, Lukas and Nathan Halahan. Pictures by George Jenkins.

In 2014 a number of BMX brands dropped one or both of their 16 and 18 inch offerings. Yet, there seems to be an influx of youth entering the BMX freestyle market. This perplexed me. Jim Cielencki of Sunday Bikes is doing the opposite. This delights me.

I was fortunate to meet up with Jim C. at The Wheel Mill in Pittsburgh this past winter. We discussed youth, BMX, and Sunday Bikes. Specifically the Primer 16 and 18 inch complete models. Jim graciously hooked up my sons Nathan and Lukas with 16 and 18 inch Primers to test then give away to some lucky kiddos at their inaugural Next Generation Youth Jam.

The bikes showed up well packaged, blemish free and built up easily. The boys were stoked on the colors, Safety Green for the 16 and Ocean Blue for the 18. I also liked the look of the bikes. I noticed right away the concept proportional geometry that Jim and I discussed the month prior. The rider areas looked roomy, the rear ends nice and short, and the bar height and width just right.

The Primers are spec’d well with Sunday OEM kit. I would like to see a top load stem on the 18 but other than that I wouldn’t change a thing if we were to run them as completes. The bikes weighed in at 19.4 and 24.2 lbs on our shop scale. For sub $400 completes you won’t find much better than that. Most dads (and mums too) would likely swap some parts out for their higher end favorites and I see no problem with getting the weights down closer to the 17 and 19 lb weights of the boys current set ups. I would also like to see full chromoly frame and forks but understand the cost effectiveness with the mostly Hi-tensile steel used.

Sunday Primer 16" BMX Bike

Sunday Primer 16″ BMX Bike

The Sunday Primer 18" BMX Bike

The Sunday Primer 18″ BMX Bike

Next stop was The Wheel Mill to cut the boys loose. Both Nathan and Lukas appeared comfortable straight away. Lukas quickly pulled me to the mini ramp room excited to show me the ease at which he could manual across the deck and around the tree trunk feature. Nathan had me follow him to the park room to show me a crisp 540 transfer. With the rear ends on the Primer 16 and 18 being 1.5 inches shorter than their current bikes this did not surprise me. But, with these short rear ends, I really wanted to see how the boys jumped the big line in the woods jump room. It wasn’t long before my curiosity was satisfied. Although the boys were not boosting and tricking the jumps quite as they normally do, the bikes appeared to handle very well. Nathan did say he felt a little sketchy on the big hip, wall ride, and step down but had no qualms with the smaller trick box. Lukas said he didn’t feel quite as stable at first but felt comfortable by the sessions end. I would like to see (with the short rear ends) the boys roast these bikes at their local trail spot where a different set of skills and more stable platform is required. There is good reason why the adult version trail specific frames tend to have slightly longer chain stays than their street and park counterparts.

Nathan and Lukas Halahan getting tech on the Sunday Primer Bikes. The frame geometry makes a huge difference here, which younger BMX riders will really love.

Nathan and Lukas Halahan getting tech on the Sunday Primer Bikes. The frame geometry makes a huge difference here, which younger BMX riders will really love.

Overall the Primer 16 and 18 get thumbs up and smiles from Nathan, Lukas, and I. And, Jim C. gets high fives from all of us. Jim is stoked on getting right for the youth of BMX. His approach to proportionally designed geometry at Sunday Bikes is setting a new standard.

Sneak Peek Full Cromo USA Made 18″ BMX Forks

 Prototype USA Made Cromo 18" BMX Forks

So much to get stoked on in 18″ BMX right now! Check out the sneak peek of these prototype 18″ BMX forks. 100% cromo, made in the USA and from what we hear super light. Can’t say which company these are from yet, but exciting to see such quality stuff in the works for younger shredders. Stay tuned.

Prototype USA Made Cromo 18" BMX Forks

Sunday Radocaster 18″ Frame Sneak Peak!


This is so boss. Sneak Peak of the Sunday Radocaster 18″ frame (fork coming too)! Same geometry as the 18″ Sunday Primer which Sunday researched for smaller shredders. This is for real – full CR-MO with hollow dropouts and removable brake hardware! Awesome to see a company taking groms seriously! Coming end of summer / fall! Sunday is still working on the colours and graphics. What would you like to see?


St. Martin 2014 Mini Darwin 14″ BMX Bike


2014 St Martin BMX bike Mini Darwin 14 inch

St. Martin is a flatland BMX company, however this BMX would be perfect for flatland or any other style of BMX as the geometry is not flatland specific. This 14″ bike fills a gap between the 12″ and 16″ sizes. Here at BMX Groms we believe it is important to put kids on the right size of bike in order for them to stay safe and progress. If parents had their kids on a soccer team they wouldn’t buy shoes a couple of sizes too big, so kids could grow into them. Yet many parents buy their kids a 20″ BMX so they can grow into it. The large heavy cumbersome bike slows progression and can cause accidents. The following is the press release from St. Martin:

“Yes, a 14-inch bike, not 12, not 16. The original idea came from Taka at Delirium Distribution, St-Martin distributor in Japan. He realized that there was a big gap between 12″ and 16″ bikes. Some children feel unconfortable on 12″ and 16″ bikes because they are already too tall for a 12″ bike or yet too small for a 16″ bike. We’ve worked 6 months on that 14″ bike project to reach the best balance possible, in order to make kids happy when they ride. The bike uses modern technical solutions such as integrated headset, a headset stem, cassette hub on rear wheel, forged alloy crank, 4 alloy pegs, unidirectional tires and 1-pc seat/seatpost combo.
And it also uses specific solutions for small riders : 1″ headset, 19 mm O.D. handlebar and grips, 24×9 gearing with short crank arms. A too short gear ratio is not good when combined with short crank arms. Rider may loose bike control because body and legs move too fast.

This nice and small bike will be available in Japan in March and in Switzerland and France in April.”

Hit the link for complete specifications:

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