Description
Outback is a tough and reliable rim designed for gravel rides, MTB trail rides, and cross-country races.
The Stealth Grey series, a limited-production model from ASTRAL CYCLING , features ceramic coating technology from the American brand Cerakote. This high-performance coating, which offers excellent wear and corrosion resistance, is hard, crack-resistant, and highly resistant to abrasions and other damage, making it widely recognized as a military-spec (Mil-Spec) coating.
The matte-finish rims with ceramic coating deliver exceptional durability even under harsh conditions, such as rough off-road terrain, allowing you to build wheels that withstand long-term use.
The asymmetrical (offset) design improves the balance of spoke tension between the left and right sides by up to 30%, enabling the assembly of wheels with high rigidity, durability, and stability.Compatible with tire widths ranging from 35 mm to 67 mm (1.35 inches to 2.6 inches), this 20-inch rim is a reliable choice for cargo bikes loaded to the brim and tough mini-velos tackling rough terrain.
The name “Outback” refers to Australia’s vast, untamed wilderness and symbolizes a spirit of adventure and the challenge of exploring uncharted territory. Its outstanding reliability and stability have earned high praise from handmade bike builders and many gravel riders alike.
[FEATURE]
All ASTRAL CYCLING rims are designed to maximize tubeless compatibility. A deep groove called the “Drop Channel” is located in the center of the rim, allowing for smooth installation of tubeless tires.They also incorporate the “Tubeless Easy” system, which precisely adjusts the diameter of the bead seat where the tire contacts the rim, allowing for easy and safe tire installation and removal. This system also reduces the risk of damaging the tire bead.Furthermore, the design allows the bead to be easily seated even with a floor pump, making it simple to change tires in your home garage to suit your ride.
[SPEC]
| Material: | Aluminum |
| Color: | Stealth Grey |
| Coating: | Ballistic Armor Coating |
| Size: | 20" (406) |
| Hole: | 28H, 32H |
| Height: | 23.0 mm |
| Width: | Inner 25.0mm, Outer 28.0mm |
| Brake Type: | Disc Brake Only |
| Nipple Type: | External |
| Optimal Tire Width: | 35mm - 67mm / 1.35" - 2.6" |
| Tire Interface: | Clincher / Tubeless Ready |
[SIZE]
| Size: | 20" |
| ETRTO: | 406 |
| Weight: | 208g |
| Spoke Bed Diameter: | 374.5 mm |
| ERD: | 377 mm |
| Max Spoke Tension: | 130 kgf |
| Spoke Bed Offset: | 2.5 mm |
[Wheel Building Tips]
Wheel Building Specifications from ASTRAL (※Brand’s official website)
*Since these are products imported directly from overseas, they may have minor scratches or paint imperfections caused during manufacturing or shipping. We select and ship items that do not affect their usability, so we would appreciate your understanding.
*Decal specifications may vary depending on the shipment batch.
- 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.