Description
Alpha combines excellent functionality with a well-tailored, beautiful form
Alpha is a new helmet from KPLUS that combines excellent functionality with a well-crafted, beautiful form, offering not only safety, but also a high level of fit, ventilation, aerodynamics, and design.
And it provides faster, more comfortable, and safer rides for many cyclists, for all situations from on-road to gravel riding.
New Protection System Mips® Air
Mips®︎ stands for Multi-directional Impact Protection System, a system that protects the head from multi-directional impacts and serves to disperse the impact to the head in the event of a fall. Many manufacturers are now using this system, but the Mips® Air in the Alpha has a different structure than the previous Mips®.
The Mips® Air is the lightest and most breathable model in the Mips® system. It is jointed to the helmet body by a specially designed mechanism that slides over the top of the helmet liner in any direction upon impact, reducing the risk of serious head injury.
K2 Fit System
Alpha features the K2 Fit System, a new fitting system from KPLUS. The dial is of moderate thickness and size, designed to be easy to pick up and easy to rotatE Its shape is inspired by the tourbillon, a mechanical watch structurE
When the dial is turned, the plate holding the head moves back and forth to adjust the circumferencE The movement of the plate allows the watch to fit any head shapE
Magnetic buckle for easy attachment and removal
Many of the helmets in the KPLUS lineup use the patented FIDLOCK® magnetic buckle made in Germany. The magnetic buckle, characterized by its strong magnetic force and intuitive operation, snaps into place simply by placing it close to the helmet. The buckle can be easily detached by simply sliding the top and bottom parts of the bucklE
High ventilation by precisely calculated hole layout
Alpha features a sleek frame line from front to back in combination with calculated ventilation holes, which combine to achieve a high level of ventilation and aerodynamics.
The 17 ventilation holes are laid out at different angles, drawing air in through the front aero holes and directing it to the side and rear ventilation holes for smooth airflow. The optimized airflow removes heat and moisture from inside the helmet, keeping you comfortable at all times.
Weightless Center of Gravity
The helmet is designed to balance weight distribution so that the center of gravity is located near the upper part of the cervical vertebrae when the rider is in a riding posturE This is designed so that the burden of the weight is not felt easily and the neck does not get fatigued even after riding for a long timE
SIZE
S : 53-56cm
M : 56-59cm
L : 59-62cm


- 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.









