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Super Lightweight & More Aero

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SKU: X38C/T Category:


2016 BladeX ULTIMATE ROAD X38 Road Racing Carbon Wheelset

Super Lightweight & More Aero




Size: 700C
Type: Clincher/Tubular Available
Weight: Clincher: 445±15g; Tubular: 325±10g 
Material: Torayca® T800
Ceramic Braking Surface: Yes
ERD: 569mm
Depth: 38mm
Max Width: 27mm
Brake Track Width: 25.0mm
Internal Width: 17.5mm
Nipple Hole Type: External
Allowed Tire Size: 21mm-27mm
Recommended Tire Size: 23mm or 25mm
Max Tire Pressure: 120psi
Model: Sapim CX-Ray
Type: Bladed/Straight Pull
Color: Black
Count: Front:20, RND: 12, RD: 12
Lacing: Front Radial, RND 2X, RD 3X
Nipple Type: External
Compatibility: Campagnolo 9/10/11 Speed or Shimano 9/10/11 Speed
Max Rider Weight: 120kgs
Color: Black/Red Available
Material: Titanium
Weight:  46g
Stiffer but Lighter

Needless to say, carbon fiber material is the first and most important thing for a carbon wheel, it determines the strength and stiffness of a carbon wheel. In other words, if we want to make a high performance wheel, we have to choose the right carbon fiber.

There are several manufacturers supplying carbon fiber but as we all know in the cycling industry, Toray is considered the best. Toray’s carbon fiber are used in the tail of the Boeing 777 and the fuselage of the Boeing 787, as well as various types of high end sporting goods further adding to the testament of their strength and popularity across disciplines. We also choose Toray as our exclusive supplier.

The chart below consists of data from Toray. Basically, higher Tensile Strength makes a wheel stiffer and higher Tensile Modulus makes a wheel stronger (not easy to break).

As you can see from the chart, T800 Tensile Modulus is 36% higher than T700. When carbon fiber is layered in different directions, a T800 wheel will be at least 36% stronger than an identically layered T700.

Additionally, T800 is 10% stiffer than T700 thus providing an increase in power transfer you can feel.

By using T800 material, we are able to achieve higher durability by applying the same amount of material. This allows us to reduce 2 layers of carbon fiber in certain low key areas to provide further weight reduction all while not effecting the overall integrity of the wheel. This leads to our ability to create a wheel that is stiffer but lighter.

X-Balance Design: Smooth transition between major parts

In X-Balance Design technology, each joint inside the rim is perfectly handled and doubled reinforced. The force from the tire, braking, and spokes are spread throughout the whole rim. X-Balance design is the base foundation to our rim durability.

X-Layup: Brake track & Spoke Hole
50C-23mm2 18 16
In order to increase the durability of the wheel, we add extra layers of carbon fibers to certain major sections of the rim.

35+4 Layer Spoke Hole Wall

Spoke holes account for most of the weight. By using as many as 39 layers on the spoke hole wall, the rims take on an extremely stiff and durable form. Our strict testing standards require every spoke hole on the X Series Rim take 300kgf strength without cracking.

Extra 4 Layers on the Brake Track

4 extra layers of carbon material are added to the brake track to further increase durability and safety while hardly effecting overall wheel weight.

With X-Ceramic Brake System, You Don’t Need Alloy To Have Excellent Braking.

We have been constantly testing and improving the performance of our braking surface. The Basalt Fiber material used in our Pro wheels line proved to work much better than the original carbon fiber. Now we have found an even better solution by applying Ceramic Fiber on the brake track. The Ceramic Fiber maintains much better heat resistance than Basalt Fiber.

Most importantly, Ceramic Fiber’s heat radiance is much better than the carbon fiber and Basalt Fiber thus putting an end to Carbon Clincher braking issue.

The Benefits of Using Ceramic Bearings
It’s simple to understand that smooth rolling can make your power more efficient, allow you to go faster, and the smooth braking can lead to better overall control. We make our wheels roll and brake smoothly by applying special proprietary material into the wheel’s design. In short, our wheels roll and brake smoother as a result.


A bicycle’s speed is most determined by the performance of its revolving components. Wheels are a primary component of a bicycle, thus making an upgrade to ceramic bearings a worthwhile investment. There are 2 main features of using Ceramic Bearings:

1. Ceramic Balls are closer to perfect round: A steel ball in Grade G25 is meant to be a high quality ball in this material. If measured by size, its precision is 25/1,000,000 inch.

Nevertheless, a ceramic ball can be made to be in Grade G5. Its precision is much higher than the best steel ball. That’s why we say Ceramic Ball is closer to perfect round.

2. Ceramic Balls are stiffer: Stiffness is very important to a ball used in a bike, it’s also called “Modulus of Elasticity”. A steel ball’s Modulus of Elasticity is around 30,000,000Pounds/Inch, while a ceramic ball’s is 47,000,000Pounds/Inch.

These features make ceramic bearings an ideal upgrade that roll smoother and provide longer durability with easy maintenance.

Also by upgrading to ceramic bearing, there are many other benefits over their steel counterparts:

Features Benefits
Higher hardness of rolling element
- Better wearability - Greater durability - Longer service life
Lower gravity
- Lightweighting the system - Lower centrifugal force during rotation, consequently less bearing wear and heat generation and bearings can run at higher speed
Higher stiffness
- Increase the rigidity of system - Less sphere deformation under load and this will transfer energy better
Higher precision and better surface finish of ceramic balls
- Less friction between ceramic balls and races - Less wear
- Less maintenance or maintenance free - Races will not block due to rusty
Magnetism free
- Less magnetic contaminations to be magnetized into the raceway that can affect smooth rotation and destroy the raceway
Electrical isolation
- No galvanically stimulated corrosion - Can be used in applcation that requires electrical isolation
Carbon Hub Shell
In order to decrease the overall wheel weight even further, carbon fiber is used in the central part of the hub. Carbon fiber also allow an increase in the strength of the shell.
Extremely Lightweight
With all the added benefits of our upgraded hubs, weights are only 88 Grams for front and 207 Grams for rear.
Sapim® CX-Ray Straight Pull

CX-Ray is best aero spokes in the world, in a weight as light as a titanium spoke, it still receive the best result in fatigue testing.

The article below from Sapim® describe the features of this spoke very well:

Its unique strength and flexibility make the CX-Ray suitable for most bicycle disciplines. The middle section of the spoke is drawn then pressed in a special mold to form its specific profile. CX-Ray spokes are used by top bike racers and triathletes around the world. Even downhillers use them, recognizing their strength and flexibility. Special alloy treatment and sophisticated production make this all possible. The CX-Ray fits is all standard hub holes.

Ref.: http://sapim.be/spokes/aero/cx-ray

Sapim® Self-lock nipples

The newly patented Secure Lock nipple of Sapim is a locking mechanism that prevents nipples from untightening.

Highly precise and accurate machines have specifically been developed to produce this type of locking system. They ensure stable and well defined deformation on the thread.

Ref: <http://sapim.be/nipples/aluminium/secure-lock-nipples>

Additional information

Weight N/A


  1. Garry

    Are prices shown in US or AUS dollars

    • admin

      Hi Garry, right now all the prices are in US Dollars.

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