Reviews & Ratings
The IMTOS Ultralight Carbon Fiber Thru Axle is a modular, universal thru axle system designed for weight savings and compatibility across different frames. Users report weights around 28-30g per pair, significantly lighter than typical 67-90g stock axles. The product uses carbon fiber shafts with interchangeable aluminum threaded ends in various pitches (1.0, 1.5, 1.75mm) and lengths. Prices range from €160 on AliExpress to $169-220 USD from other sellers. The design allows transfer between frames with different thread requirements, but has sparked debate about safety, proper fit, and the modular interface.
AI Summary
Pros
- Extremely lightweight at 28-30g per pair, offering significant weight savings over stock axles
- Universal design with interchangeable thread adapters works with multiple frame standards and thread pitches
- Aesthetically pleasing design with high-quality finish according to users who received them
- Manufacturer provides test data and is responsive to customer inquiries
- Successfully tested in real-world riding conditions including sprints over 1000W and rough roads
Cons
- Potential safety concerns about the modular design where threaded ends screw onto carbon shafts
- Length and fit issues reported, with some users finding axles too short or needing specific adapters
- Requires careful assembly, specific torque (8-9Nm), and potentially two tools for installation
- Color of thread adapters may not match frame aesthetics since thread pitch determines color
- Expensive for weight savings with cost per gram savings around $3.33 according to one user
Key Points
- Weight: 28-30g per pair
- Material: Carbon fiber shaft with aluminum threaded ends
- Thread pitches included: 1.0, 1.5, 1.75mm
- Price range: €160-220 USD
- Torque specification: 8-9Nm
- Modular design with interchangeable components
Where to Buy

25-29g Ultralight Carbon Fiber Thru Axle with Replaceable Head – Fits Most Road Bikes – High Strength Lightweight Axle

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