The L-TWOO GRT 1x12s gravel groupset offers impressive shifting performance and value, closely matching Shimano GRX in function and weight, but has notable issues with brake lever travel and some ergonomic concerns. It is a viable budget option for gravel builds, though the price advantage over Shimano GRX is narrowing.
Pros
- Shifting performance is smooth, light, and predictable, very close to Shimano quality.1
- Build quality is good, especially the rubber hoods and aluminum components feel sturdy.12
- Installation is straightforward with good access to bolts and bleed ports.1
- Compatible with generic Shimano brake pads, and stock pads perform well in wet and dry conditions.1
- Clutch mechanism reduces chain slap.1
- Lightweight compared to Shimano GRX (claimed 1,087g vs 1,165g).1
- Comes with brake pads, extra hardware, and a plug for routing brake lines through the frame.2
- Well packaged and quality feel in hand for brakes and shifters.2
Cons
- Brake lever travel is excessive even after re-bleeding, lacking free stroke adjustment.1
- Brake calipers (ZRACE XG) may not be the intended L2 calipers, possibly causing lever travel issue.1
- No brake lever reach adjustment (in some versions).1
- Shifters have a rattling issue.1
- Replacing shift cable may be difficult due to cable entry port location under the rubber hood.1
- Price (£229) is not significantly cheaper than Shimano GRX 1x12 ($249 for shifters and calipers).1
- Front brake lever snapped during a crash test.1
- Aluminum parts may be heavier than carbon fiber alternatives.2
Key Facts
- Claimed weight around 1,087g, measured 1,154g (with calipers), compared to Shimano GRX 1,165g.1
- Compatible with 12-speed and cassettes up to 11-50T.1
- Uses BH59 standard hoses and fittings.1
- Includes carbon fiber rear derailleur cage and narrow-wide pulley wheels.1
- Friction-type clutch mechanism reduces chain slap.1
- Price on AliExpress: approximately £229 for shifters, derailleur, and calipers (Trace Velo), while another reviewer purchased for $26.83 (likely a deposit or partial payment).12
- Compatible with 140mm and 160mm rotors (direct mount style).2
- Shifters can shift down multiple gears (possibly 3 or 4) and up multiple gears.21
Reviews & Ratings
05:58The reviewer discusses the L-TWOO GRT 1x12s Aluminium Gravel Hydraulic Disc Brake Groupset, which they purchased on AliExpress for $26.83. They highlight the quality feel of the components, the decision to choose aluminum over carbon for durability, and the inclusion of extra hardware. The reviewer plans to use this groupset for a gravel bike build.
22:44The reviewer tests the LTWOO GRT Disc 1x12s gravel hydraulic shifter with ZRACE XG flat mount brake caliper. He notes the shifter design is heavily inspired by Shimano, with the brake lever used for downshifting and a small paddle behind it for upshifting. The shifting performance is praised as very close to Shimano quality, smooth and predictable. However, the braking has excessive lever travel even after re-bleeding, which the reviewer suspects may be due to mismatched calipers (ZRACE XG) not being the intended L2 calipers. The build quality is good, and the price is around £229 on AliExpress, but the reviewer notes that Shimano GRX 1x12 is only slightly more expensive, making the value proposition less clear.
29:39The reviewer discusses the LTWOO GRT Disc 1x12s Gravel Hydraulic Disc Shifter + ZRACE XG Flat Mount Brake Caliper extensively, highlighting its features, performance, and value. They note that the groupset offers fully hydraulic disc braking, a 1x12 gravel-specific configuration, and carbon fiber components. The reviewer praises its shifting performance, braking power, and clutch mechanism, but also mentions some minor issues like rattling in the shifters and lack of brake lever reach adjustment.
21:51The reviewer briefly mentions the LTWOO GRT Disc 1x12s Gravel Hydraulic Disc Shifter + ZRACE XG Flat Mount Brake Caliper,Carbon Fibre,Benchmark GRX| | but does not provide detailed analysis.
Where to Buy
LTWOO GRT 1x12speed Road Groupest/Hydraulische Scheibenbremse Groupest L/R Schalthebel+R Schaltwerk+F/R Bremssattel - AliExpress 18
L-TWOO GRT 1x12s AluminIum Gravel Hydraulic Disc Brake Groupset
LTWOO GRT Disc 1x12s Gravel Hydraulic Disc Shifter + ZRACE XG Flat Mount Brake Caliper,Carbon Fibre,Benchmark GRX - AliExpress 18
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