Welcome to the official ICAN Japan blog.
This time, we're presenting a long-term review of the ICAN Aero 40 II wheels by the popular international cycling YouTube channel "Cycling Professor."

This review isn't just an unboxing impression.
It's a comprehensive evaluation that includes approximately 1,000 km of actual road testing, performance verification under harsh conditions like rain, strong winds, and rough roads, and even a teardown inspection of the hub's internal components.

"I want to use authentic carbon wheels while keeping my budget as low as possible."
For such cyclists, this review is incredibly helpful.

1. ICAN Aero 40 II — Amazing Lightness and Practicality

First, let's look at the specifications.

• Weight: Approx. 1,177g (front and rear set)
• Rim height: 40mm
• Inner rim width: 23mm
• Recommended tire width: 28-32mm
• Spokes: Sapim CX-Ray
• Hub: 45T ratchet system

At 1,177g, these 40mm deep-section carbon wheels for disc brakes are exceptionally lightweight.
They offer not only nimble handling on climbs but also excellent responsiveness during acceleration.

Furthermore, they utilize globally acclaimed Sapim CX-Ray spokes.
This provides peace of mind not only in terms of lightness but also durability and reliability.

2. Performance Revealed in 1,000km of Real-World Testing

The review involved testing the wheels in various environments over approximately 1,000 km.

Stable in Rain, Mud, and Rough Roads

During the testing period, conditions included muddy rain, strong winds, and completely wet roads.
The wheels were deliberately ridden through puddles to thoroughly check the hub's waterproofing and coating durability.

Despite this, the wheels were reportedly in excellent condition after riding.

Manageable 40mm Depth in Crosswinds

A 40mm rim depth is popular for its excellent balance of aerodynamic performance and ease of handling.

In the actual review,

"It's very comfortable even in strong winds, allowing for a relaxed ride."

was highly praised.

The characteristic suppleness of the Sapim CX-Ray spokes, which are not overly stiff, also seemed to contribute to a comfortable, less fatiguing feel even on long rides.

Smooth Flat Cruising

In fair weather tests, the wheels also received high marks for their cruising performance.
The aerodynamic performance of the 40mm rim combined with its lightweight construction provides a very smooth acceleration feel on flats.

3. Hub "Break-in" for Even Smoother Performance

What was particularly interesting in this review was the verification of the hub's "break-in" period.

May Feel Slightly Stiff Initially

When new, there was a slight stickiness in the freehub body when stopping pedaling.

However, this is not uncommon for new ratchet hubs and occurs as the internal grease and parts settle in.

Reaches True Smoothness After 500-700km

The review noted a significant improvement in rotational performance after about 500-700km of riding,
transforming into a very smooth rotation.

Even if new wheels feel a bit stiff, they will perform to their full potential as they break in.

4. Hub Disassembly Check — High Waterproofing Confirmed

After approximately 800-1,000km of riding, the rear hub was disassembled for an internal inspection.

The result was:

• Sufficient grease remaining
• No water ingress internally
• Almost no wear observed

which indicated an extremely good condition.

Despite repeated testing in adverse weather, the internal condition remained intact, confirming the high sealing performance of ICAN hubs.

Furthermore, these wheels employ ICAN's unique 45T ratchet structure,
achieving high engagement and stable drive feel.

5. High Durability, Resisting Trueness Issues Over Long Distances

No matter how lightweight, wheels that quickly go out of true cannot be used with confidence.

As a final check, the wheels were measured on a truing stand for the review.
Even after approximately 1,000 km of testing, the roundness remained in excellent condition.

This indicates:

• High rim molding precision
• High wheel assembly precision
• Thorough spoke tension management

demonstrating the high manufacturing quality of ICAN.

They can be considered a highly finished product that can be used with confidence for everything from daily training to long rides and races.

6. Simple and Refined Design

The Aero II series earns high praise not only for its performance but also for its design.

The understated logo design and clean rim shape naturally blend with a variety of frames.
The review video also received many positive comments regarding its stylish appearance.

7. Conclusion — ICAN Aero II 40mm is "Top Class within Budget"

The final evaluation from "Cycling Professor" was very simple.

"I genuinely recommend this wheelset. It's truly enjoyable to ride."

The points particularly praised were the following three:

• High cost performance, unbelievable for under 1,200g
• Durability and waterproofing proven in rain tests
• Good balance of climbing, cruising, and crosswind stability

For riders who want authentic performance while keeping costs down, the Aero II 40mm is a very attractive option.

Finally

The ICAN Aero 40 II is a carbon wheel that achieves a high level of lightweight, aerodynamic performance, and durability.

"I don't want to make a mistake with my first carbon wheels."
"I want performance beyond the price."

This is a model we highly recommend for those who feel this way.

ICAN Japan offers a carefully selected range of wheels for Japanese riders.
Please consider ICAN wheels for your next ride.