This time, we will introduce our best-selling carbon frame, the AERO 007.

This model boasts excellent quality for a low-priced aero carbon frame, and is designed very faithfully to the basics, with a design that is not破綻のないもの (not broken or distorted).

You can see our unique technology everywhere, but we'll show you the details without revealing any trade secrets (lol).

About AERO 007 Aero Carbon Frame

The Aero 007 was launched to achieve the best performance at a reasonable price. It is a beloved frame with many enthusiasts within the company.

The total weight is light, with the frame alone at 1140g and the fork at 390g, making a total of 1530g.

At first glance, you'll notice a generous volume in key areas, which is evidence of its aerodynamic shape while ensuring rigidity and strength.

Each pipe has a predominantly straight shape, and we will explain the reason for this later.

This time, we will discuss the design philosophy behind each part of the frame.

Your perspective on frames might just get an upgrade.

Understanding the basics of road bikes from each part of the frame

As you probably know, let's review the names of each part of the frame first.

Then, when you look at the Aero 007 frame again, you'll notice that it's designed faithfully and seriously to the basics.

The reason why each pipe is predominantly straight without curves is due to considerations for rigidity. Frame curves are effective when you want to create flex, but in the 007 frame, flex is designed through pipe cross-sectional shape, thickness, and wall thickness.

The good thing about carbon material is that it allows for such free design. Even with wall thickness, continuously identical parts are surprisingly few.

There are different grades of carbon fiber materials. We use Toray T700 and T800. While there are even more expensive carbon fibers, more expensive doesn't necessarily mean better. High-modulus fibers, which are expensive, are stiff but lack strength. Therefore, T700 and T800 are optimal for bicycles.

The 007 frame uses T700.

Now, let's start by looking at the triangular pipes in the center of the frame.

① Main Frame Description

Top tube

The center is thin, and the ends are thick-walled, featuring a butted structure because they receive stress. High-end aluminum frames also have double-butted or triple-butted structures, but carbon frames allow for even more complex butted structures.

Furthermore, as you move forward, the cross-section also becomes thicker at the front due to the strong forces received from the handlebars.

Also, the overall width is wide from side to side, not top to bottom, due to strong forces in those directions and for ride comfort.

The pipes are edged as they go forward, also considering design, aerodynamics, and strength.

The sloping top tube (lower at the back) is advantageous for overall rigidity and also helps lower the center of gravity.

Head tube

You'll notice that the head section of the Aero 007 has a rather tough aero shape.

And, faithfully to the basics, it has a tapered shape with a thicker lower section.

The way rigidity is imparted to this section makes a significant difference in handling.

The design philosophy is, precisely, sharp handling.

If you read this in conjunction with the front fork section, you will understand the general design philosophy of the Aero 007.

Down tube

The downtube is the thickest part of all frame components. As you might guess, this is because it's the part that absorbs the most force.

What's interesting is that while the front head section is vertically flat, the BB (bottom bracket) side is horizontally flat. The head side receives vertical forces from pushing and pulling the handlebars, while the BB side receives lateral forces from pedaling. Of course, it goes without saying that it has an aerodynamic shape.

By the way, most carbon frames have internal cable routing. This is done for aerodynamic benefits as well as aesthetic appeal.

However, when assembling a bike yourself, this wiring can be quite tricky. ICAN also struggles with this point, and we want to assure you that the design is made to be as easy to assemble as possible.

Seat tube

The forces on the seat tube are also complex. Since it receives forces from the front, back, left, right, and also twisting forces, one might wish for a perfectly circular cross-section here. However, an oval cross-section is adopted with an aerodynamic shape in mind.

Furthermore, while maintaining an aerodynamic shape, a sturdy lug is provided for the connection with the top tube. In terms of styling, there's an intention that it's okay if this part is slightly bulging because it will be hidden by the rider (lol).

That concludes the explanation of the three pipes of the main frame + the head.

Next, we will explain the rear triangle, which is the sub-frame, and the front fork.

② Sub-frame Description

Seat stay

The seat tube extends from the seat post to the rear hub.

As you can see, it is much thinner compared to other parts. This is because it bears relatively less stress and is the part that creates flex, improving ride comfort. There are even frames where this part is curved.

We already mentioned that the upper part of the seat tube, where it connects to the main frame, has robust reinforcement, but you'll also notice that the connection point is slightly lower. This design, which makes the rear triangle smaller, is popular, but do you know why?

The correct answer is to increase the rigidity of the rear.

Of course, the positioning is also for aerodynamic effect.

Chainstay

This part extends from the BB to the rear hub. It also receives complex stresses. You've already rightly inferred the vertical and horizontal stresses, but another force is also added.

This is related to the chainring being on the right side.

Force tends to be biased to the right.

As you can see in the photo of the Aero 007, this part has a vertically flat cross-section.

This is not only for aerodynamic shape but also a strategy to use a thick and strong pipe in a narrow space.

Front fork

Finally, the front fork. As you can see, this part is largely exposed to wind resistance, so it has a flat, aerodynamic shape. And it is mostly straight. Why is that? Here's the final quiz.

This is because straight forks are stiffer than bent forks.

The rigidity of this part directly affects handling. As we discussed in the head tube section, higher rigidity leads to quicker handling.

Summary

Thank you for your patient attention.

I tried to avoid overly technical language as much as possible, but how was it?

I hope you understood the orthodox and all-around characteristics of the Aero 007, and that you also thought about the shape of your own bike frame.

At the same time, I hope you realized that carbon frames are designed with meticulous attention to detail, providing ample strength where needed and minimizing weight in areas that don't bear much stress.

Therefore, please handle with the utmost care!

This is a request from ICAN.

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