MATTS J. 20+

  • material: aluminium
  • 20" wheelsize
  • 135x9/100x9mm axle standard
  • BSA bottom bracket standard
frame size 10"
  • material: aluminium
derailleur (r) Shimano RD-M310
shifter rear Altus
brake front Tektro HD-M275
brake rear Tektro HD-M275
chain KMC Z7
crank size 127 mm
  • 100x9mm width front hub
  • 24 spoke holes
  • 135x9mm width rear hub
  • 24 spoke holes
  • material: aluminium
  • 14-34 teeth
  • 7 speed
spokes Black steel
  • material: aluminium
  • 31.8mm diameter
  • -5 A
  • 60 mm
  • material: aluminium
  • 580mm width
  • 20mm rise
headset FSA TH888
  • material: aluminium
  • 27.2mm diameter
  • 15mm setback
kickstand center type alloy
weight 9.56 kg
Bike Frame Geometry Image
Frame Size 10"
Tyre Sizes 20"
Frame Size CM 24
ST seat tube [mm] 240
TT top tube [mm] 445
CS chain stay length [mm] 360
HTA head tube angle [°] 68
STA seat tube angle [°] 72
BD bottom bracked drop [mm] 20
HT head tube [mm] 120
FL fork length [mm] 340
R reach [mm] 305
S stack [mm] 432
WB wheel base [mm] 872
SH stand over height [mm] 483


New design, weight optimised aluminium frame with replaceable dropout hanger, designed to take 24"+ or 20"+ tyres. Low stand over height and low bottom bracket for improved handling. Equipped with mounts for bottle cages, rack, mudguards and kickstand.

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.



‘F-Mount’ equipped bikes have integrated fittings for mud guards (some bikes require model specific mud guards), making fitting fast and simple.



Integrated mount on the chainstay to fit a MERIDA kickstand (or any commercial kickstand).



‘C-Mount’ equipped bikes have the fixing points for a rear rack already integrated (some bikes require model specific rear rack), making fitting fast, simple and reliable.