The IMTOS Ultralight Carbon Fiber Thru Axle is a modular, lightweight axle system praised for significant weight savings and compatibility, but with concerns about durability and fit.
Pros
- Extremely lightweight at 25-30g per pair
- Interchangeable heads for multiple frame standards
- Aesthetically pleasing design
- Manufacturer provides test data and is responsive
Cons
- Rough patches and pitting on carbon
- Gaps around glued hexagonal steel insert
- Potential safety concerns about modular design
- Length and fit issues reported
Key Facts
- Weight: 25-30g per pair
- Material: Carbon fiber shaft with aluminum threaded ends
- Thread pitches included: 1.0, 1.5, 1.75mm
Reviews & Ratings
The reviewer discusses the IMTOS Ultralight Carbon Fiber Thru Axle with Replaceable Head, noting that it comes as a kit with interchangeable heads to fit different bike standards. They mention that the axles are very light at 25g for the pair, but have some cosmetic imperfections such as rough patches and pitting. Despite these concerns, the axles have been ridden for about 500-600 km without issues, and the reviewer finds them fascinating as a niche product now available on AliExpress.
AI Summary
Pros
- Very light: 25g for the pair
- Interchangeable heads allow compatibility with different through axle standards
- No issues after 500-600 km of riding and frequent removal/retorquing
more pros in the video
Cons
- Rough patches and pitting on the carbon
- Gaps around the glued hexagonal steel insert
- Concern about the hex insert rounding out or spinning
more cons in the video
Key Points
- Weight: 25g for the pair
- Cost: 145 quid with coupon
- Comes as a kit with interchangeable heads
more key points in the video
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
more pros in the review
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
more cons in the review
Key Points
- Weight: 28-30g per pair
- Material: Carbon fiber shaft with aluminum threaded ends
- Thread pitches included: 1.0, 1.5, 1.75mm
more key points in the review
Where to Buy
25-29g Ultralight Carbon Fiber Thru Axle with Replaceable Head – Fits Most Road Bikes – High Strength Lightweight Axle
Questions about IMTOS Ultralight Carbon Fiber Thru Axle with Replaceable Head
Sign up and share your experience — help other riders decide!
Create Account & Review