| Size : Step-Thru, S, M | Step-Thru, S, M, L, XL |
| Material : Double-Butted Chromoly Steel | Double-Butted Chromoly Steel Frame & Fork |
| Seat Post diam. | 31.6mm |
| Seat Clamp Size : 34.0mm | 34.0mm |
| Front Wheel : 20" (etrto 406) / TA 15 x 100 mm spacing | 20" (etrto 406) / TA 15 x 100 mm spacing, Disc Brake only |
| Rear Wheel : TA Insert : 700c (etrto 406) | TA Insert : 700c (etrto 622) / 12 x 142mm spacing, Disc Brake only QR Insert : 700c (etrto 622) / 10 x 135mm spacing, Disc Brake only |
| Front Tire Clearance : 55mm with mudguards | 55mm with mudguards |
| Rear Tire Clearance : 55mm with mudguards | 55mm with mudguards |
| Front Thru Axle : 15 x 100, 125mm long, Disc Brake only | 15×100, 125mm long, 17mm thread length, 1.5mm pitch |
| Rear Thru Axle : 12×142, 172mm long, 17mm thread length, 1.5mm pitch | 12×142, 172mm long, 19mm thread length, 1.75mm pitch |
| Fork Headset : | 1-1/8″ threaded Integrated with locking cap |
| Steerer Headset : 1-1/8″ Ahead | 1-1/8″ Ahead |
| Bottom Bracket : 68mm BSA | 68mm BSA |
| Brake Mounts : IS brake mount front and rear, for minimum 160mm and max 180 rotors | IS brake mount front and rear, for minimum 160mm and max 180 rotors |
| Q-Factor : 145mm | 145mm |
| Gears : For 1x rear derailleur gear system | For 1x rear derailleur gear system |
| Standard Rack Weight : 1,320g | 1,320g +/- |
| Rack Dimensions : 400 x 500mm | 400 x 500mm |
| Rack Bolt Size : M15 x 15mm | M15 x 15mm |
| Weight : 18kg | Complete Medium bike weighs 18kg |
| Maximum Total Loading Weight Including Rider : 125kg | 125kg |
Description
This product is in stock and can be delivered immediately.
This product is sold as a frame set.
The "Blurple" and "Pirate Black" colors will incur an up-charge of +22,000 yen.
Cargo bike that can be used in Japan where roads and bicycle parking spaces are narrow
Copenhagen, Denmark-based brand OMNIUM creates fast, lightweight, and stable cargo bikes that make light work of everything from carrying luggage to daily transportation to traveling.
The OMNIUM Mini v3.1 is an updated model that combines the latest frame standards and practicality with a compact design that fits the Japanese urban environment.
While maintaining the easy handling of the previous Mini series, the revised frame design accommodates a wider range of riders. In particular, the addition of the Step-Thru model adds new value in terms of ease of getting on and off the bike.
The standard maximum width of 55mm (2.15") tires can be accommodated, and a through-axle standard and high-performance dropouts are used. It is highly reliable and can be used for both daily use and long rides.
The compact size offers an excellent balance between load capacity and handling, and its performance can be fully demonstrated in narrow alleys and bicycle parking environments.
Adjustable rocker dropouts allow for a variety of drivetrains, including external gear shifting as well as internal gears and belt drive. Flexible customization is possible according to usage and preference. Theoretically, assembly to fixed gear specifications is also possible.
Furthermore, the use of interchangeable inserts allows for both through-axle and quick-release rear end standards. The design allows for easy replacement of the rear derailleur hanger in the event of trouble, making it suitable for long distance rides and harsh usage environments.
Rocker dropouts can be selected from the following at the time of frame kit purchase
10 x 135mm QR with IS brake mount
(for internal gear hub or QR rear hub)
12 x 142mm through-axle / IS brake mount
(for through-axle hubs)
In both cases, the front fork is a 15 x 100 thru-axle specification.
The ride quality of the Mini v3.1 can be summed up in one word: "It rides so naturally that you forget it is a cargo bike.
Despite the large front carrier, the handling is natural and uncluttered. The support structure of the rack is directly integrated into the frame, so the weight of the cargo has minimal effect on handling. The vehicle is remarkably stable even when loaded.
OMNIUM is more than just a means of transportation; it enriches everyday mobility itself.
This vehicle, which combines a sense of fun with practicality, is sure to change the scenery of your daily life a little more lightly.
[SPEC]
| Frame Kit Accessories |
|
[SIZE GUIDE]
| Height | Recommended Frame Size |
| 155 - 185cm | Step-Thru |
| 165 - 175cm | Small |
| 175 - 185cm | Medium |
| 185 - 195cm | Medium 185 - 195cm |
| 195 - 205cm | X-Large |
[GEOMETRY]
| Mini v3.1 | Step Thru | S (52) | M (54.5) | L (57) | XL (60) |
| Seat Tube (Center - Top) (mm) | 520 | Seat Tube (Center - Top) (mm) 520 | 540 | 570 | 520 520 540 570 600 |
| Stack Height (mm) | 545 | Stack Height (mm) | 520 520 | 570 | Stack Height (mm) |
| Stack (mm) | 552 | 552 | 572 | 601.5 | 630 |
| Reach (mm) | 380 | 355 | 369 | 390.5 | 411.5 |
| Stand Over Height (mm) | N/A | 767 | 786.5 | 815.5 | Bottom Bracket Height (mm) |
| Bottom Bracket Height (mm) | 288 | 288 | 288 288 | 288 288 288 | Bottom Bracket Drop (mm) |
| Bottom Bracket Drop (mm) | 81 | 81 | 81 81 | 81 81 | Seat Tube Angle |
| Seat Tube Angle | 73.3° Seat Tube Angle | 73° Seat Tube Angle | 73.5° Seat Tube Angle | 73.5° Seat Tube Angle | 73.5° 73.5° 73.5° 73.5° 73.5° 73.5° 73.5 |
| Head Tube Angle | 73.5° 73.5° 73.5° 73.5° 73.5° 73.5° 73.5 | 73.5° Head Tube Angle | 73.5° Head Tube Angle | 73.5° Head Tube Angle | 73.5° 73.5° 73.5° 73.5° 73.5° 73.5° 73.5 |
| Wheel Base (mm) | 1030.8 | 1006.5 | 1026.5 | 1057 | 1086 |
| Axle to Crown (mm) | 298.5 | 298.5 | 298.5 298 | 298.5 298.5 298.5 298.5 298.5 298.5 | 298 298 298 |
| Rake (mm) | 25 | 25 | 25 | 25 | 25 |
| Trail (mm) | 50.5 | 50.5 | 50.5 | 50.5 | 50.5 |
| Chain Stay Length (mm) | 462 | 462 | 462 462 | 462 462 | 462 462 462 462 |
| Full Bike Length (mm) | 1660 | 1636 | 1656 | 1686.5 | 1715.5 |
- Orders are shipped within 1–2 business days after payment is confirmed. Orders placed by 10:00 AM are generally shipped the same day.
- Messenger delivery is available within Nagoya City only (excluding complete bikes and framesets).
- We ship every day from Monday through Sunday, except on temporary closure days.
- Shipping destinations: throughout Japan and worldwide.
- Shipment may be delayed depending on credit card processing. If you would like to request a delivery date or time, please add a note in your cart.
- All orders are shipped from Circles.
- For damage or loss during transit, please contact the carrier.
Complete Bike Shipping within Japan
- A shipping fee of ¥9,900 (tax included) applies to complete bikes. Additional charges may apply for Okinawa and remote islands.
- After purchase, we perform a final inspection before shipping. Please allow 1–2 weeks in some cases.
- For packing, some parts may be removed. We strongly recommend having the bike reassembled and checked by your local bicycle shop before riding.
- We will contact you by email with delivery details.
- Products are also sold in-store, so availability may change before the order is finalized.
Frameset Shipping within Japan
- Flat-rate shipping within Japan: ¥5,500 (tax included). Additional charges may apply for Okinawa and remote islands.
- Shipping rates for OMNIUM framesets and complete bikes differ.
- We will contact you by email with delivery details.
- Facing and tapping preparation for framesets purchased from Circles is available at no additional charge. Details will be provided after purchase.
- Headset and bottom bracket installation are also available for an additional labor fee. Please contact us if required.
Custom & Stock Wheel Shipping within Japan
- A shipping fee of ¥2,000 (tax included) applies. Additional charges may apply for Okinawa and remote islands.
- Stock wheels undergo a final inspection by a mechanic before shipping. Please allow approximately 3 business days for dispatch.
For international orders, shipping costs vary by destination. Please check the amount shown at checkout.

![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/DSC02839.jpg?v=1777539601&width=1500)
![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/MAXIME-OMNIUM_2026_MINI_LILAC_HAZE.jpg?v=1777531128&width=2510)
![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/Copperhead_d6a0ce33-27fa-479b-90eb-4a3e3c52a8f1.jpg?v=1764759425&width=1200)
![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/Blurple_9c63a49f-3ed6-4d3a-beea-30aff6c876aa.jpg?v=1764759424&width=1200)
![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/Glorious_Grey_f1e837b1-ae90-484c-a723-2248370d1542.jpg?v=1764759425&width=1200)
![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/matt_black_930afd05-d27e-4eeb-830f-0383e00d0237.jpg?v=1764759425&width=1200)
![[Available for immediate delivery] OMNIUM Mini V3 Frame Kit](http://shop.circles-jp.com/cdn/shop/files/LILAC_HAZE_f10cd22f-4a42-4c31-bea0-37969ed9e3e4.jpg?v=1764759425&width=1200)