Description
Circles Special Order RETROTEC Single Speed Mountain Bike
Once upon a time, Surly created a model called the 1x1. It was not just a bike frame, but a single speed bike with infinite possibilities (and imagination) in its extreme simplicity.
For our first MADE, we asked RETROTEC / RETROTEC Curtis to create a beautiful, simple, and uniquely Curtis bike that would carry on the 1 x 1 concept.
I knew before I placed the order that Curtis would make it look great, and when they did, the only thing that came out of my mouth was "awesome.
The smooth curve of the top tube and seat stays.
The slightly thicker chromoly tubing, painted in a single color.
The bikes he makes are equal parts playful and beautiful.
When ridden, they have a light coggyness that makes you want to scream in the mountains, and when set down and gazed at, they have a presence that quietly brings tears to your eyes.
This frame is the result of the intersection of his aesthetics, technology, and Circles-like selfishness.
Ultimate simplicity: no gearboxes, no extra cables, all you need is the power to pedal and the will to decide which way to go. Simplicity is the pure joy, pleasure, and pain of riding a bicycle.
Robust chromoly frame: supple yet extremely sturdy. It supports the rider on all surfaces, from pavement to rough terrain, and provides long-lasting reliability.
Too deep versatility: The bike has the grace of a single speeder, but can be fitted with bigger tires to make it an off-road partner, or with racks and fenders to make it a reliable commuter. It can be transformed into any style you can imagine, just as there have been models with both disc brakes and rim brakes.
Ease of maintenance: The simple construction minimizes the need for daily maintenance and repairs. This makes the relationship with a bicycle more accessible and enjoyable.
[SPEC]
| Frame Material | Steel |
| Head Tube | 1-1/8" |
| Compatible Head Parts | EC34/34 |
| Brake Mount | V-brake |
| BB | BSA/JIS, 73mm Threaded |
| Front End | 100mm QR |
| Rear end | 135mmHorizontal Dropouts |
| Tire Clearance | 26x2.4" |
| Suitable Height | Around 170-185cm / One Size Fits All |
[GEOMETRY]
| Top Tube Length Effective (C-C) | Top Tube Length Effective (C-C) |
| Top Tube Length | 534mm |
| Seat Tube Length (C-T) | Seat Tube Length (C-T) 410mm |
| Seat Tube Angle | 73.0° (C-T) |
| Chain Stay | 420mm |
| Head Tube Length | 140mm |
| Head Tube Angle | 71.0° (0.5mm) |
| Standover Height | 775mm |
| BB Drop | 42mm |
| Front Center | 648mm |
| Fork Length | Fork Length 400mm |
| Fork Rake | 45mm |
- 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.