Best Retrospec kids bikes

Retrospec does the one thing almost no other budget brand does: it publishes a minimum and maximum saddle height for every kids bike it sells. That single habit is why it keeps winning our budget picks — you can check the fit from your sofa instead of guessing from a wheel diameter.

Koda or Dart? The honest split

The Koda line is single speed, steel, rim-braked and light for its price. The Dart line adds seven gears and, on the Plus models, real mechanical disc brakes — and about four pounds for the privilege.

The rule we use: buy a Koda if the child is still learning or rides flat ground, and a Dart if they ride hills, gravel, or far enough from home that a single speed turns every incline into a walk. The case for and against gears at each age is on when do kids need gears.

Weight is the price of the price

Retrospec frames are steel, and steel weighs what it weighs. The Dart Plus 24 at 30.6 lb is nearly ten pounds heavier than a woom EXPLORE 5 at the same wheel size.

A median nine-year-old is about 63.2 lb, so the Dart Plus 24 is the proportional equivalent of an adult riding a 86 lb bicycle. That is manageable on the flat and punishing on a climb. If weight is your deciding factor, the lighter options are on best lightweight kids bikes.

The Koda 20 is the quiet standout

It is the only Koda with no coaster brake — a rear V-brake with a reach-adjustable lever instead — and it publishes a 21.5 to 27.5 inch saddle range plus a 150 lb rider weight limit. That is a six-inch adjustment window, which at this age is two or three years of growth, and it is unusual at any price.

The trade-off is a single speed at a wheel size where most rivals are geared. For a six- or seven-year-old on pavement that is the right call; for a nine-year-old riding to school it is not.

Discs on a budget: the Dart Plus

Mechanical disc brakes at this price are genuinely rare, and the 160 mm Tektro rotors on both Dart Plus models work far better in the wet than a V-brake on a steel rim. They also need occasional pad adjustment, which a rim brake on a kids bike largely does not.

If you want the brake question settled from first principles, start with kids bike brake types explained.

What we would actually buy

For most children: the Retrospec Koda 16. 18.5 lb, a published 18.5–23 inch saddle range, a hand lever as well as the coaster, and the lowest-risk purchase in the budget tier.

For a six- to eight-year-old on pavement: the Koda 20 — hand brakes only and a six-inch saddle window.

For hills or wet weather: the Dart Plus 20 or Dart Plus 24, accepting four extra pounds for seven gears and disc brakes.

At 12 inch, we would not. The Koda 12 is a decent 12-inch pedal bike, but at that stage a 6.7 lb balance bike teaches more — see best balance bikes.

For the woom side of this comparison in full — GO 1 to EXPLORE 6, with every published fit range — see best woom bikes.

Two cuts of this size worth reading next: the Retrospec options are compared on best Retrospec kids bikes, and the geared models across 20 and 24 inch are on best kids bikes with gears.

Once you have decided gears are due, the models worth buying — and why the shifter matters more than the gear count — are on best kids bikes with gears.

Every bike at this size is geared, so the shifter is the real decision. We compare trigger against twist across 20 and 24 inch on best kids bikes with gears.

For what each budget actually buys right now — one pick per stage with every published figure — see best bikes for kids in 2026.