Matts J12 (Girl)


Matts J12 (Girl)

Color variants

Matts J12 (Girl)
frame MATTS J. 12
frame size 7"
color pink (blue)
fork Rigid Steel
derailleur (r) no
derailleur (f) no
shifter front no
brake lever Kid Lever
brake front Side Pull
brake rear Coaster in R.Hub.
chainwheel Steel 28T 89L BK
chain Z410A
hub front Steel NT
hub rear Steel Coaster
rim Alloy Black
freewheel 16T
tire front Kid Smooth 12 x 2.25"
handlebar Kid Alloy Rise 460
headset General
seat post Steel 22.2
saddle Matts kid 16
kickstand no
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


These models are built around a very small adult frame with 26" wheels. As the child grows, the wheels can be swapped for 650B wheels, meaning the bike will fit your child for longer.

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, again 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.