ZTTO Ultralight 11/12 Speed Road Bike Cassette 11s 12s 11-28/30/32/34/36T ULT Sprocket Freewheel 112g~146g 11V 12V Gravel K7 HG

Reviews & Ratings

Tom Bowers Cycling on YouTube3 months ago

00:15:22@ 09:10

I Made My 5.5kg BMC Even Lighter - Diminishing Returns Hit Hard

The reviewer discusses their experience with the ZTTO Ultralight SLR Gen 3 cassette, which they have purchased as a replacement for a previous ZTTO cassette that failed. They note it is a newer, supposedly improved generation.

AI Summary

Pros

Offers a massive weight saving (around 127g).
ZTTO has reportedly gone back to the drawing board to improve it.
The weight has been increased slightly from the first generation, which is theorized to improve durability.

Cons

The reviewer's previous first-generation ZTTO cassette failed 'pretty disastrously'.
They are skeptical about its durability, especially under high power (e.g., 450+ watt hill climbs).
They explicitly state they are not ready to endorse or recommend it yet.
They position themselves as a 'guinea pig' to test its longevity.

Key Points

This is the new 'SLR Gen 3' version.
The reviewed sample weighs 127.1 grams.
It is about 15 grams heavier than the failed first-generation model.
The reviewer hopes using a smaller 34-tooth chainring will put less stress on the large aluminum sprockets, potentially extending its life.

kubackje of Chinertown in Component Deals & Selection 8 days ago

Purchased: 2026-03-31