frame J12 Alloy Coaster
frame size 7"
fork Rigid Steel
derailleur (r) -
derailleur (f) -
brake lever Kid Lever
shifter rear -
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"
tire rear Kid Smooth 12 x 2.25"
wheelset Alloy Black
spokes Steel UCP
handlebar stem XF-S890
handlebar Kid Alloy Rise 460
headset General
seat post Steel 22.2
saddle Matts kid 16
kickstand -
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




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.