Omnium Mini V3.1 Cargo Bike Frame Kit
V3.1 UPDATES
The OMNIUM Mini is a fast, agile reimagining of the short john bike, built to handle surprisingly heavy loads. Its compact size makes it easy to manoeuvre and integrates simply with both smaller residences and multimodal transport. The front rack is ideal for anything too bulky and uncomfortable to carry on your back. You can keep your belongings in sight and carry serious weight all day without the bike feeling overloaded. The 29-inch rear wheel helps the Mini effortlessly keep pace over longer distances, giving it an edge over other short john designs. Full rear rack mounts let you attach a range of panniers or rack mounted child seats, ideal for urban commuters. Unlike many cargo bikes, the Mini rides like a regular bike. It feels quick, stable, safe and intuitive. Adapting to the Mini takes minutes and you quickly wonder how you managed without it.
DESIGN
The Mini is designed around a 55 mm (2.15 inch) tyres front and rear. Bigger tyres come with plenty of benefits, and these are the ones that matter most. High volume tyres run at lower pressure, which gives you a natural layer of cushioning between you and the road. The result is more comfort, more control, and an easier ride on rough surfaces like gravel, cobblestones, and battered city streets.
We have also updated the frame with the new v3.1 segmented fork that still comes with thru axles. Thru axles first appeared on downhill mountain bikes in the late 90s, and these days they are the standard on most disc brake bikes. They make perfect sense on a cargo bike. This setup increases stiffness, improves braking performance, handles heavy loads more securely, and reduces the chance of incorrect installation or brake rub.
| Frame Material | Double Butted Chromoly Steel Frame |
| Sizes | ST (Step Through), S, M, L, XL |
| Rack Dimensions | 400x500mm |
| Seat post diameter | 31,6mm |
| Seat post clamp size | 34mm (ST 34,9mm) |
| Fork Brake Mount | IS – Disc only |
| Rear Brake Mount | Dependent on insert choice – Disc only |
| Front Wheel | 406, 15x100mm spacing |
| Rear Wheel | TA Insert: 622, 12 x 142mm spacing, disc only QR Insert: 622, 10 x 135mm spacing, disc only |
| Tyre Clearance Front | 55mm with mudguards |
| Tyre Clearance Rear | 55mm with mudguards |
| Thru Axle Front | 15×100, 125mm long, 17mm thread length, 1.5mm pitch |
| Thru Axle Rear | 12×142, 172mm long, 19mm thread length, 1.75mm pitch |
| Headset | 1 1/8” Ahead |
| Bottom Bracket | 68mm BSA |
| Gears | For 1x rear derailleur gear, single speed or internal hub gears |
| Rack Bolt | M15 x 15mm |
| Rack Weight | TBU |
| Frame Kit Weight | TBU |
| Maximum Loading Weight on Front Rack | 50kg |
| Maximum Total Loading Weight Incl. Rider | 125kg |
| Mini V3.1 | Step Through |
S (52) | M (54.5) | L (57) | XL (60) |
| STL – seat tube length (c-t) | 520 | 520 | 540 | 570 | 600 |
| TTL – top tube length (c-c / actual) | 545 | 520 | 540 | 570 | 600 |
| Stack | 552 | 552 | 572 | 601.5 | 630 |
| Reach | 380 | 355 | 369 | 390.5 | 411.5 |
| SO – standover height | N/A | 767 | 786.5 | 815.5 | 844 |
| BBH – bottom bracket height | 288 | 288 | 288 | 288 | 288 |
| BBD – bottom bracket drop | 81 | 81 | 81 | 81 | 81 |
| STA – seat tube angle | 73.3 | 73 | 73.5 | 73.5 | 73.5 |
| HTA1 – head tube angle rear | 73.5 | 73.5 | 73.5 | 73.5 | 73.5 |
| WB – wheelbase | 1030,8 | 1006.5 | 1026.5 | 1057 | 1086 |
| A-C – axle to crown | 298,5 | 298 | 298 | 298 | 298 |
| R – rake | 25 | 25 | 25 | 25 | 25 |
| T – trail | 50,5 | 50,5 | 50,5 | 50,5 | 50,5 |
| CSL – chainstay length | 462 | 462 | 462 | 462 | 462 |
| FL – full bike length | 1660 | 1636 | 1656 | 1686.5 | 1715.5 |
Frame kit includes : Frame, fork, headset, seat clamp, rack, thru axle front and choice of QR dropouts or 12mm Thru Axle dropouts and axle.








