L-TWOO GRT 1x12s Carbon Gravel Hydraulic Disc Brake Groupset

The L-TWOO GRT 1x12s Carbon Gravel Hydraulic Disc Brake Groupset is praised for its high-quality finish, smooth shifting, and value, with some caveats regarding brake mounting and bleeding. It offers a compelling budget option for gravel builds, though users should be aware of its specific requirements.

Pros

High-quality finish and attention to detail on shifters and derailleur.1 2
Smooth and crisp shifting with multi-shift capability.2
Strong clutch on rear derailleur prevents chain slap.1 2
Large cage on rear derailleur accommodates big cassettes.1
Brake calipers look high quality for the price, with cooling fins on pads.1
Easy installation similar to Shimano components.2
Includes necessary mounting hardware and adapters.1
Extremely cheap price for a full hydraulic groupset.1
Derailleur can be locked for wheel removal, a convenient feature.2

Cons

Brake calipers are two-piece bolted design, not one-piece.1
Brake calipers come with post mount only, requiring adapter for flat mount frames.2
Left shifter has no shifting mechanism, only brake lever.2
Bleeding brakes may cause fluid leakage if not done carefully.2

Key Facts

Price around £130.1
Rear derailleur supports up to 50-tooth cassette.1 2
Brake calipers are flat mount (with adapter needed for post mount frames).2
Compatible with Shimano brake pads and mineral oil.2
Shifters are carbon fiber (aluminum version available).2
All shifting is controlled from the right shifter.2
Uses standard BSA bottom bracket interface.2
Derailleur has a locking mechanism for wheel removal via Allen key.2

Sources

1
Tom Bowers CyclingI Built a Full Carbon AliExpress Gravel Bike for Under £1000!
2
BASIC BikesDie neue LTWOO GRT 1x12 Gravel Schaltung im Überblick bei BASIC Bikes

Reviews & Ratings

BASIC Bikes

13:58

Die neue LTWOO GRT 1x12 Gravel Schaltung im Überblick bei BASIC Bikes

The reviewer from Basic Bikes discusses their experience with the L-TWOO GRT 1x12s Carbon Gravel Hydraulic Disc Brake Groupset, which they installed on their carbon gravel bike. They highlight the high-quality construction, smooth shifting, and ease of installation. They also mention some unique features like the derailleur locking mechanism and the need for an adapter for flat mount brakes.

March 10, 2023Watch on YouTube

Tom Bowers Cycling

15:04

I Built a Full Carbon AliExpress Gravel Bike for Under £1000!

The reviewer states that the LTWOO GR9 groupset inspired the entire project. They are impressed with the finish quality of the shifters and hoods, note the rear derailleur has a strong clutch and large cage for big cassettes, and praise the brake calipers for looking incredible for the price.

August 28, 2025Watch on YouTube

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