The ZTTO Ultraight cassette is a lightweight, budget-friendly option that performs well in smaller sizes, but larger versions have design flaws that can lead to structural failure. Reviewers agree it's a good value for weight-conscious riders, but durability and reliability concerns, especially with bigger sprockets, make it a risky choice for demanding use.
Pros
- Lighter than Dura-Ace (165g for 11-32 12-speed)1
- Costs only a quarter of Dura-Ace price1
- Performance on par with Dura-Ace in smaller sizes (11-28, 11-32)12
- Entirely steel except largest sprocket in smaller sizes, promising good durability1
- Visually appealing with color options2
- Good value for weight-conscious riders2
Cons
- Potential structural failure in larger sizes (11-34T, 11-36T) due to thin support arms and sharp internal edges acting as stress risers2
- Larger sprockets are more flexible, increasing failure risk, especially with spiky power delivery on rough terrain2
- Noisier than official Shimano/SRAM cassettes2
- Aluminium teeth can snap if shifting under load2
- Durability not fully tested (only 400 km in one review)1
- Questionable safety margin due to extreme material removal2
Key Facts
- Weight: 165 g for 11-32 12-speed cassette (claimed by reviewer, measured on scale)1
- Construction: All steel except largest sprocket (aluminum) in 11-32 version; larger versions (11-34, 11-36) have aluminum construction with thin support arms12
- Price: About a quarter of Dura-Ace (approx. 80-100 GBP)1
- Design flaw: Larger sprockets (11-34, 11-36) have thin support arms creating a cantilever beam effect, increasing risk of failure2
- Compatibility: 11/12 speed, available in 11-28/30/32/34/36T12
- Material: CNC-machined from aluminum for larger sizes, pushing material limits2
Reviews & Ratings
19:41The reviewer discusses the ZTTO Ultraight 11/12 Speed Road Bike Cassette, specifically the 'Ultimate Gen 2' model. They note it is lighter than Dura-Ace, costs only a quarter of the price, and is entirely steel except for the final sprocket which is aluminum. They have about 400 km on it and find its performance on par with Dura-Ace, provisionally rating it S tier pending further durability testing.
09:52The reviewer analyzes the ZTTO Ultraight cassette, focusing on a structural failure in the 11-36T version. They explain the design flaw, compare it to the more robust 11-28T version they use, and discuss how use case and sprocket size affect failure risk. They conclude these cassettes prioritize weight over durability.
Where to Buy
ZTTO Ultraight 11 12 Speed Road Bike Cassette 11s 12s 11-28/30/32/34/36T ULT Sprocket 11s 34T Gold Flywheel 11V 12V Gravel K7 HG
Variants
| Configuration | Speeds | Largest Cog | Weight |
|---|---|---|---|
| 11s 11-28T | 11 | 28 T | — |
| 11s 11-30T | 11 | 30 T | — |
| 11s 11-32T | 11 | 32 T | — |
| 11s 11-34T | 11 | 34 T | — |
| 11s 11-36T | 11 | 36 T | — |
| 12s 11-28T | 12 | 28 T | — |
| 12s 11-30T | 12 | 30 T | — |
| 12s 11-32T | 12 | 32 T | — |
| 12s 11-34T | 12 | 34 T | — |
| 12s 11-36T | 12 | 36 T | — |
Specifications
Attributes
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