BLADEX SDM™ HUB TECHNOLOGY
Strength & Durability Maximized Geometry, Built-in Ceramic Bearings
|Model:||BladeX SDM Ceramic||BladeX SDM Ceramic|
|Center to L/R Flange:||40.5mm / 40.5mm||35.5mm / 16.3mm|
|Flange Diameter L/R:||30mm / 30mm||37mm / 90mm |
|Bearings:||2 Ceramic||5 Ceramic|
When you start using your bike to sprint and climb, lateral stiffness becomes one of the most important parameters controlling your wheels’ performance. Poor lateral stiffness means that there’s more strain rubbing away your brake pads as you ride, your pedaling power isn’t transferring to your wheels efficiently, forcing you to work harder and wear out your bike’s hardware sooner just to finish your ride. How do we maximize the lateral stiffness in our wheelsets? Check out the figure below:
The formula that determines a wheel’s lateral stiffness is D = W/L. D refers to the lateral stiffness in your wheels, while W is the distance from hub center to right flange and L is the length of the drive side spoke. The design of BladeX ULTIMATE’s rear hub extends the W to the maximum distance possible for a road bike system, and it’s oversized right flange (90mm in diameter) shortens the spokes’ length by 9mm. So, from the aspect of geometry, with its optimized W and L, a wheel with the ULTIMATE hub is stiffer than a wheel with a DT Swiss 240 hub.
We use an oversized, 90 mm flange for the BladeX SDM’s rear hub, which results in 118% more torsional stiffness than the competing DT Swiss 240S can offer. With optimized torsional stiffness, the power from your pedaling goes more directly to your wheels. You’ll enjoy noticeably quick and responsive acceleration, along with improved your climbing and sprinting. Simply put, you don’t feel like anything’s dragging on your bike and trying to hold you back when you’re climbing and riding with this much power.
Durable Cassette Body
Currently, there are two materials used for cassette body making: steel and a lighter alloy blend. The alloy reduces your bike’s overall weight, but it’s not as strong as steel, so it gets worn and “bitten” by the cassette over time. To make the rear hub both light and strong, we use the alloy to make most of the cassette body, but we reinforce it with 8 steel bars. The 8 bars are screwed to cassette body, and they stay in direct contact with the cassette, protecting it from everyday damage.
When you ride, every ounce of impact that your bike’s wheels take leads to the hub, which may deform, dislodge, and too, and reducing bearing balls’ life. We use a Reinforced Ring to prevent the ball bearing from getting deformed or dislocated by impact, making each wheel more resilient.
Ceramic Bearings Integrated
How fast of a bicycle is most determined by the performance of its revolving components, wheels are the main revolving components of a bicycle. This makes it reasonable to upgrade the wheels with Ceramic bearings. There are 2 main advantages of using Ceramic Bearings:
- Ceramic Ball is 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, it’s precision is 25/1,000,000 inch. Nevertheless, a ceramic ball can be made to Grade G5, it’s precision is much higher than the best steel ball. That’s why we say Ceramic Ball is closer to perfect round.
- Ceramic Ball is 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. Both of the main features make the bearing with ceramic balls smooth, easy to maintain and fit for all conditions. Also upgrading to ceramic bearing brings a lot of benefits over the steel counterparts:
|Higher hardness of rolling element||
– Better wearability
– Greater durability
– Longer service life
– Lightweighting the system
– Lower centrifugal force during rotation, consequently less bearing wear and heat generation and bearings can run at higher speed
– 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
– Less magnetic contaminations to be magnetized into the raceway that can affect smooth rotation and destroy the raceway
– No galvanically stimulated corrosion
– Can be used in application that requires electrical isolation