Description
[MECHANIC'S COMMENT]
ASTRAL Serpentine is a robust and reliable mountain bike rim for all kinds of trail riding.
The main feature is the asymmetric design. By optimizing the spoke tension difference between the left and right spokes and improving the tension balance by up to approximately 30%, the overall rigidity, durability, and longevity of the wheel are increased. Sharp handling that prevents sagging even on rough trails and enables precise tracing of lines.
The wide 32mm inner width firmly supports modern high-volume MTB tires. Even at low pressure settings, the tire shape remains stable, enhancing cornering security and traction performance.
It also works well with modern geometry steel hard tails like the SKLAR PBJ, where the suppleness of the frame and the rigidity of the rim are well balanced.
CHRIS KING / Chris King Boost CL hub is a modern model combining Boost standard / Center Lock specification / Micro Spline free body.
The wide flange design ensures high wheel rigidity. It is suitable for a wide range of riding styles from trail to enduro and dirt touring.
The brake rotor uses a center locking system. This ensures both secure fixation and easy maintenance.
Shimano Micro Spline free body is used for the rear hub, which is compatible with 12-speed cassettes. The finely notched notches ensure quick power transmission and high durability.
Precision, durability, and serviceability.
As the name implies, this is the king of hubs, designed for long-lasting use.
[SPEC]
Tire: Tubeless compatible
Brake type: Disc brake
Axle type: Front 110x15mm , Rear 148mm
Number of spokes:32H
Compatible Cassette:SHIMANO Micro Sprlne
[PARTS]
| Manufacturer / Model | Color | |
| Front Rim | ASTRAL Serpentine 29" | Black |
| Front Hub | CHRIS KING Boost CL | Matte Black |
| Rear Rim | ASTRAL Serpentine 29" | Black |
| Rear Hub | CHRIS KING Boost CL | Matte Black |
| Spokes | SIMWORKS Condor #14 | Black |
| Nipples | Brass Nipple | Black |
What is a wheel in a bicycle? It is an important part for a bicycle to move forward and has a great influence on the appearance of the bicycle. The wheels are such a very, very important component. This time, I would like to talk about how they are assembled, not about their performance.
In the world of bicycle wheels, there are two types: "fully assembled" and "hand-assembled.
Complete assembly" is a wheel that is sent out by the wheel manufacturer as a finished product, and we, store mechanics, rarely have to make major adjustments to the wheel. (Some wheels need to be fine-tuned, and some wheels need to be hand-assembled.) Because of this, some wheels are made for a specific group of people, or for professionals, or for professional-level riders, and they are not made with each individual customer in mind.
This is where Circles' specialty, "hand assembly" comes in.
The advantage of "hand assembly" is that we, mechanics, select the parts that make up the wheel one by one and assemble them to complete the wheel to make it just right for the user.
- 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.

![GORILLA SPUN Build Wheel [ASTRAL Serpentine 29"x CHRIS KING Boost CL]](http://shop.circles-jp.com/cdn/shop/files/15Circles-GG30-Bla-Mat-Bla-29_-321.jpg?v=1772535887&width=1500)
![GORILLA SPUN Build Wheel [ASTRAL Serpentine 29"x CHRIS KING Boost CL]](http://shop.circles-jp.com/cdn/shop/files/15Circles-GG30-Bla-Mat-Bla-29_-323.jpg?v=1772536039&width=1500)
![GORILLA SPUN Build Wheel [ASTRAL Serpentine 29"x CHRIS KING Boost CL]](http://shop.circles-jp.com/cdn/shop/files/15Circles-GG30-Bla-Mat-Bla-29_-322.jpg?v=1772536039&width=1500)
![GORILLA SPUN Build Wheel [ASTRAL Serpentine 29"x CHRIS KING Boost CL]](http://shop.circles-jp.com/cdn/shop/files/15Circles-GG30-Bla-Mat-Bla-29_-325.jpg?v=1772536039&width=1500)
![GORILLA SPUN Build Wheel [ASTRAL Serpentine 29"x CHRIS KING Boost CL]](http://shop.circles-jp.com/cdn/shop/files/15Circles-GG30-Bla-Mat-Bla-29_-324.jpg?v=1772536039&width=1500)
![GORILLA SPUN Build Wheel [ASTRAL Serpentine 29"x CHRIS KING Boost CL]](http://shop.circles-jp.com/cdn/shop/files/15Circles-GG30-Bla-Mat-Bla-29_-326.jpg?v=1772535887&width=1500)