Description
Astral releases its long-awaited 20" rim!
The Outback is a tough and reliable rim designed for gravel riding, MTB trail riding, and cross country racing.
The asymmetric (asymmetric / offset) design improves the balance between left and right spoke tension by up to 30%, resulting in a stiffer, more durable, and more stable wheel. This 20-inch model rim accommodates tire widths from 35mm to 67mm (1.35" to 2.6") and can reliably handle the footwork of cargo bikes loaded with luggage or tough minivelos pushing through rough terrain.
The name "Outback" refers to Australia's vast unexplored lands, symbolizing a sense of adventure and the challenge of exploring the unexplored. Its superior reliability and stability have earned it a reputation among handmade bike builders and many gravel riders.
[FEATURE]
All ASTRAL CYCLING rims are designed to maximize tubeless compatibility. The center of the rim has a deep groove called a "Drop Channel" that allows for smooth installation of tubeless tires. The "Tubeless Easy" system, which features a precision-aligned bead seat diameter for easy and safe tire installation and removal, is also used. This system also reduces the risk of bead damage. In addition, the design allows the bead to be easily raised even with a floor pump, making it easy to change tires in your garage or at home, depending on where you ride.
[SPEC]
| Material : Aluminum | Aluminum |
| Color : Matte Silver | Matte Silver |
| Size : 20" (406) | 20" (406) |
| Hole : 28H, 32H | 28H, 32H |
| Height : 23.0mm | 23.0mm |
| Width : Inner 25.0mm, Outer 28.0mm | Inner 25.0mm, Outer 28.0mm |
| Brake Type : Disc Brake Only | Disc Brake Only |
| Nipple Type : External | External |
| Optimal Tire Width : 35mm - 67mm / 1.35" - 2.6 | 35mm - 67mm / 1.35" - 2.6" |
| Tire Interface : Clincher / Tubeless Ready | Clincher / Tubeless Ready |
[SIZE]
| Size : 20 | 20" |
| ETRTO : 406 | 406 |
| Weight : 208g | 208g |
| Spoke Bed Diameter : 374.5mm | 374.5mm |
| ERD : 377mm | 377mm |
| Max Spoke Tension : 130kgf | 130kgf |
| Spoke Bed Offset : 2.5mm | 2.5mm |
[Wheel Building Tips]
Wheel Building Spec from ASTRAL (*Brand's website)
The product may have minor scratches or paint irregularities, but if they do not affect the function or performance, they are treated as good quality. We ask for your understanding and tolerance as these products are directly imported from overseas.
- 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.