This electronic groupset shows promising innovation with excellent features like app programming and replaceable batteries, but early versions suffered from reliability issues that improved in later updates.
Pros
- Excellent battery life
- Great companion app with easy navigation and good translations
- Flawless shifting performance after initial issues
- Spectacular braking performance
Cons
- Early versions had front derailleur circuit board failures
- Shifter buttons intermittently fail to detect presses
- Rear shifting quality is subpar, especially when shifting to easier gears
- Feels clunky and slower compared to established competitors
Key Facts
- Replaceable battery with approximately 900 km range per charge
- Supports 7 to 13 speed cassettes
- Hydraulic brakes with no reported fluid leakage issues
Reviews & Ratings

The reviewer briefly mentions the LTWOO eRX eR9 2x12s / 2x11s Electronic Groupset, Road Electronic Groupset, Replaceable battery, APP programming but does not provide detailed analysis.
AI Summary

The reviewer briefly mentions the LTWOO eRX eR9 2x12s / 2x11s Electronic Groupset, Road Electronic Groupset, Replaceable battery, APP programming but does not provide detailed analysis.
AI Summary

The reviewer discusses the LTWOO eRX eR9 electronic groupset as a runner-up for the 'Best Innovation' award. They highlight its innovative approach to navigating patent challenges in the electronic groupset market, particularly noting the creative solutions like hiding the LED indicators. However, they also mention it had some teething problems, which might be why it didn't win the 'Best Product' category. Despite these issues, the reviewer expresses faith in LTWOO's ability to resolve them and improve the product.
AI Summary
Pros
- Innovative approach to electronic groupsets
- Creative solutions to navigate patent challenges (e.g., hidden LED indicators)
- Potential for future improvements
Cons
- Had some teething problems
- Did not win the 'Best Product' category due to these issues

The reviewer discusses their experience with the LTWOO eRX eR9 2x12s/2x11s Electronic Groupset, highlighting both its potential and significant issues. They initially chose it for its unique features but ultimately replaced it due to performance problems.
AI Summary
Pros
- Competitive weight compared to Shimano 105 and Altegra
- Modern and futuristic design, especially the rear derailleur
- Replaceable battery and app programming features
- Good performance when in gear with no slipping
Cons
- Unreliable shifter button detection, especially on the right shifter
- Rear shifting quality is subpar, particularly when shifting to easier gears
- Front derailleur performance is not mentioned positively
- Feels clunky and slower compared to Shimano
- Received a beta version with unresolved issues

The reviewer discusses their experience with the LTWOO eRX electronic road bike groupset, specifically version 1.0, over six months and approximately 2,000 km. They highlight its performance, durability, and recent updates in version 2.0. The reviewer initially faced some early issues but found the groupset to be largely flawless after resolving them. They praise its shifting, braking performance, ergonomics, and companion app, while also noting some early teething problems that were addressed in later versions.
AI Summary
Pros
- Flawless performance after initial issues
- Incredible shifting
- Spectacular braking performance
- Lovely ergonomics and super comfortable on longer rides
- Great companion app with good translations and easy navigation
- Updated firmware with support for 7 to 13 speed cassettes
- Great battery life (approximately 900 km on a single charge)
- No need to rebleed or touch brakes after installation
- Durable and survived a crash with minimal damage
- Improved waterproofing in later versions
Cons
- Early issues with front derailleur dying due to a circuit board problem
- Early adopters faced random failures and battery connection issues
- Waterproofing concerns in early versions
- Reviewer initially lacked trust in the groupset's reliability
- Minor issue with shifter button after a crash (easily fixed)
Where to Buy



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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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