MyBike.parts
Choice Day x Love Delivers
This is the SLR Gen3 cassette I bought from AliExpress. I've had two of them at this point, and the quality is very good for the price of just £60.
However, the selling point is the weight. This things weighs just 122g, which is bonkers.
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Bike part mentions in this video
CassetteZTTO Ultimate 11/12 Speed Road Bike Cassette 11s 12s 11-28/30/32/34/36T ULT Sprocket Freewheel 112g~141g Road Gravel K7 HG
Created: September 12, 2025The reviewer analyzes a super lightweight cassette from AliExpress, which is the ZTTO Ultimate model. They describe its unique two-piece construction, with the front sprockets milled from a single block of steel and the rear sprockets milled from a single block of aluminum, pinned together to save weight. They weigh it at 122g and compare it to a heavier, standard 11-34t steel cassette. They note they have used an identical gold version for about 1,000 miles, showing visible wear on the aluminum teeth but with shifting still perfect. They caution that durability is a trade-off, as the aluminum teeth will wear quickly if used frequently in hilly terrain. They mention the price has dropped since launch, and they purchased it for just over 60 pounds.
AI-Summary
Pros
- Extremely lightweight (122g)
- Unique, weight-saving two-piece construction
- Shifting performance remains perfect even after 1,000 miles of use
- Prices have dropped significantly since initial release
Cons
- Aluminum rear sprockets are softer than steel chains and show visible wear
- Durability is a concern, especially in hilly areas where the larger aluminum cogs are used frequently
- Will wear through quite quickly if used often in hilly terrain
Key Points
- Latest generation super lightweight cassette from AliExpress
- Construction: front sprockets are a single milled steel block, rear sprockets are a single milled aluminum block
- The two pieces are pinned together
- Weight: 122g for the 11-28t model shown
- Reviewer has 1,000 miles of use on an identical model
- Shifting is still perfect after that use
- Purchased for just over 60 quid