The LTWOO V3 electronic groupset offers exceptional value with functional electronic shifting at a fraction of competitor prices, but its adoption is tempered by significant concerns about long-term reliability, water resistance, and poor customer support.
Pros
- Excellent value for money compared to Shimano/SRAM
- Good shifting performance and speed when properly tuned
- Flexible compatibility with various cassettes, cranksets, and brake components
- Ergonomic shifters with comfortable hoods
Cons
- Poor reliability and high failure rates, especially in early versions
- Very poor customer support and warranty service
- Water sealing issues, particularly with charging ports in early versions
- Weak chain tension in rear derailleur leading to chain slap and drops
Key Facts
- Features USB-C charging on the front derailleur only
- Uses standard 14500 800mAh 3.7V replaceable batteries
- Hydraulic disc brakes use mineral oil and are compatible with Shimano calipers
Reviews & Ratings
The LTWOO eRX/eR9 (V3) is a Chinese electronic road groupset known for its low price, typically $300-$500 USD on AliExpress with coupons. It features 11/12-speed compatibility, hydraulic disc brakes using mineral oil, and replaceable 14500 batteries. Key attributes include: price around $300-$500, weight not heavily discussed but noted as competitive, materials include alloy (eR9) or carbon (eRX) components, and it uses standard road standards with compatibility for various cassettes (up to 34T with modifications) and cranksets. The V3 version introduced USB-C charging on the front derailleur, improved shift buttons, and better water sealing, though reliability and warranty support remain common concerns.
AI Summary
Pros
- Excellent value for money, offering electronic shifting at a fraction of Shimano/SRAM prices.
- Good shifting performance and speed when properly tuned, with crisp and fast shifts.
- Flexible compatibility: works with various cassettes (beyond 32T with mods), cranksets, and mineral oil brake calipers from other brands.
- Ergonomic shifters with comfortable hoods, appreciated by users with medium hands.
- Replaceable standard batteries (14500) allow easy swaps and avoid proprietary battery issues.
Cons
- Poor reliability and high failure rates, especially for early versions (V1/V2), with rear derailleurs dying from water ingress or other issues.
- Very poor customer support and warranty service from LTWOO, with sellers often unhelpful or ghosting customers.
- Water sealing issues, particularly in V1/V2 where charging ports allow water ingress, leading to failures.
- Mushy or unreliable shift buttons on early versions, and occasional software glitches causing erratic behavior.
- Weak chain tension in the rear derailleur cage, leading to chain slap and drops, especially compared to Shimano.
- Front derailleur adjustment difficulties, including rubbing issues and limited inward movement, particularly with standard chainlines.
The reviewer briefly mentions the L-TWOO 2025 eRX Road Electronic Hydraulic Disc Brake Groupset 2x10-12 SPEED but does not provide detailed analysis.
AI Summary
The reviewer briefly mentions the L-TWOO 2025 eRX Road Electronic Hydraulic Disc Brake Groupset 2x10-12 SPEED but does not provide detailed analysis.
AI Summary
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Included Components
Questions about LTWOO V3 eRX eR9 2x12s / 2x11s Electronic Groupset, Road Electronic Groupset, Replaceable battery, APP programming
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