Using thru axles to secure wheels to frames and forks is the best possible method available. They are superior in concept, but the lack by the bicycle industry of a common standard has been a nightmare for some people. Thru axles can greatly increase the stiffness of the interface between the hub and the dropouts. Also giving the hub a unique mounting position to improve the interface between caliper and rotor on bikes with disc brakes. Whether it comes down to the difference between front and rear standards, diameter and axle thread pitch, and a confusing list of dropout widths, there are many standards to sift through.
Unfortunate is the fact that there aren’t many places to find good answers to questions about compatibility. Most manufacturers of frames do not even post the standards that they currently are using. In the chance that you lose your stock axle or want to upgrade, this absence of information can be very frustrating. That is why we are taking the time to try to clarify a few issues.
A Common Misunderstanding: Firstly, understand that DT Swiss manufactures thru axles for just about every possible standard. Try not to expect that just because your current thru axle has a DT logo it uses this DT standard. There is a big possibility that it is some other standard chosen or developed by the manufacturer with a stock axle that DT Swiss simply manufactured.
The E-thru Mystery: “E-Thru”, a Shimano-developed standard, has several standards. Use of internal or external threading, dropout thickness, and use of an external, replaceable nut are all used to determine if the axle fits your frame. For example, a basic 142 axle also fits many Boost 148 frames, while the standard E-Thru boost axle may be too long for many E-thru 142 frames because they require a shorter model. We strongly advise that you measure the actual length of your existing E-Thru axle when ordering a replacement. Don’t expect that because your frame has Boost 148 and uses E-Thru that it requires the E-Thru Boost 148 axle, as this may not be the case.
What About Sizing?
There are 4 main characteristics to consider when deciding on the proper thru axle for your bicycle frame or fork:
- Head Shape: Flat or conical (tapered)
- Total Axle Length: The length of the axle, not including the bolt head.
- Thread pitch: Expressed as distance between threads in millimeters, this is the thread standard for axles.
- Thread Length: The total length of the threaded part of an axle.
Other Helpful Tools:
- Fits…A list of known forks or frames that are compatible. (usually not very extensive)
- Also Important to observe: Sometimes there can be very small variations within each standard. For the most part, the model within the standard listed should work for you with only a few small exceptions.
Our axles are CNC-machined from high strength 7075 T6 aluminum, with multiple butting.
T6 temper 7075 has an ultimate tensile strength of 510–540 MPa (74,000–78,000 psi) and yield strength of at least 430–480 MPa (63,000–69,000 psi)
Our CNC machine can provide 0.02mm accuracy or less on each axle
Anodizing is “hard” or “hardcoat” anodizing providing protection of mechanical parts, a visually appealing look, and a good tactile feel of each axle for a long time.
100% of our axles made in Lviv, Ukraine, so we control product quality during each step of the manufacturing process.
· CNC-machined from high strength 7075 T6 aluminum, with multiple butting
· Mounting 6 mm Hex key – usually the biggest Allen key in your pocket multi-tool
· “Hard” or “Hardcoat” industrial Anodizing
· Available colors: black, red, orange, green, blue, and purple