Color variants

  • material: aluminium
  • 12" wheelsize
  • 112x9/100x9 wheelsize
  • BMX bottom bracket standard
frame size 7"
brakes Tektro 985A caliper
brake lever APSE BL-01 alloy
headset VP H721
  • material: aluminium
  • 440mm width
  • 120mm rise
  • material: aluminium
  • 22.2mm diameter

  • 42 mm

grip Kraton
seat clamp Alloy Allen
saddle MERIDA kid little
pedal Wellgo LU-P17
chain KMC S1
  • 16 teeth
  • 1 speed
bottom braket Black steel, 9pcs
hubs KT KT134 / KT KT305R coaster
  • material: aluminium
spokes Steel UCP
  • 12x2.125"
  • wire
kickstand Support side wheel
weight 8.3 kg
Bike Frame Geometry Image
Frame Size 7"
Tyre Sizes 12"
Frame Size Inch 7
Frame Size CM 18
ST seat tube [mm] 180
TT top tube [mm] 300
CS chain stay length [mm] 241
HTA head tube angle [°] 70.5
STA seat tube angle [°] 73
BD bottom bracked drop [mm] 8
HT head tube [mm] 80
FL fork length [mm] 199
R reach [mm] 221
S stack [mm] 259
WB wheel base [mm] 583
SH stand over height [mm] 317
Body Height Cm < 110


Durable aluminium frame. For 24" and 20" wheels with replaceable dropout hanger and equipped with mounts for rack, mudguards and kickstand. 16" or 12" wheel options are optimised for the use with training wheels.

The specific demands on childrens' components make them differ a lot from adult components. Not only that kids are smaller, but also do not have the same strength in their hands, for example, when it comes to braking. That's why we have chosen specific components to ensure that our youngest cyclists are able to use their bikes safely and comfortably and make them easy to handle in any situation.

Our MATTS J.+ bikes feature not just the well-proven weight and geometry optimised frame but are also designed around a lightweight, rigid fork combined with 20" or 24" 'plus' tyres for extra grip and comfort. The result, no unnecessary weight, simple, stylish and hugely effective.

Many of our bikes feature rigid forks. This helps to keep the weight down, which is a big advantage for much lighter riders. Gears are also kept to a minimum, avoiding confusion for young riders, as well as reducing weight.

All kids' bike frames are made with the same 6061 lightweight aluminium we use in our adult bikes; we don't cut any corners. They're also painted and lacquered in the same way, so the bikes can still look great even after a few tough knocks.




We use a minimum of 6061 aluminium. The pay back is that it’s possible to make lighter and more advanced frames. We use an additional heat treatment and double-butted wall thicknesses to produce light and stiff frames.