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Bjorn Stainless Steel Frame and Fork Kit


We’re as passionate about riding as we are about producing an environmentally sustainable bike.

Each Bjorn frame is produced using 60% recycled stainless steel and all the tubes are cut with diamond wire to minimize waste. The alloy forks are painted with eco-friendly paint and decals.

All frames are packaged in 100% recycled cardboard boxes and use no plastic packing materials. The bikes are shipped by sea in order to heavily reduce on carbon emissions and we offset any emissions that are an unavoidable result of manufacturing and shipping.  

Our geometry design uses a shorter stem than the average bike combined with a longer top tube. The result is the same reach as a conventional frame but more stability from the slacker headtube angle.








Comparable Fit   52 54 56 58 60
Seat Tube A 500 520 540 560 580
Seat Tube B 460 480 500 520 540
Effective top Tube C 550 570 590 610 630
Chain stay D 435 435 435 435 435
Headtube E 125 144 165 185 200
Headtube Angle F 69º 69º 69º 69º 69º
Seat Tube Angle G 74º 74º 74º 74º 74º
BB Drop H 75 75 75 75 75
Wheel base I 1055 1079 1099 1120
Standover J 765 748 802.4 821.2
Stack 555 574 592.8 611.4
Reach 390.7 405.4 420 434.7
Reach with 40mm stem 450.7 565.4 580 494.7


bjorn geometry


Headset top cup
ZS 44
Headset Bottom cup EC 44
Bottom bracket 68mm threaded BSA
Seatpost 30.9mm
Seat clamp 34.9mm
Rear hub spacing 142x12mm rear hub spacing
Front hub spacing

12x100mm front hub spacing

Max tire size


Rear brake

Flat mount disc mount

Front brake

Flat mount disc mount

Bottle mounts

Inner down and seat tube

Dropper compatibility

External down tube stealth seat tube

Fender mounts

Front and rear

Front Derailleur

Band clamp 34.9mm bottom pull


frame FRAME

Bjorn frames are produced using up to 60% recycled stainless steel. They don’t need to be painted and won’t rust.

fork FORK

Bjorn forks are 70% recycled 7005 alloy and painted with eco-friendly paint and decals.


Bjorn offset all carbon emissions from our manufacturing and shipping.


Bjorn frame and forks are produced in the most sustainable way possible with little to no material waste.


All Bjorn frame and forks are packaged using recycled cardboard and use no plastic materials and shipped by sea to heavily reduce carbon emissions.