The LTWOO R7 2x10s Road Rim Brake Groupset is an extremely affordable mechanical groupset that delivers reliable shifting once properly dialed in, but it is heavy, has a thumb shifter that prevents shifting to harder gears while sprinting or descending, and suffers from weak rear derailleur chain retention. It is best suited for winter, training, commuter, or guest bikes where low cost and functionality matter more than weight or premium feel.
Pros
- Extremely low price: approximately £62–£73 or €111 for a complete groupset.12
- Once properly adjusted, shifting is crisp and reliable with no missed shifts during testing.12
- Easy to install, taking about 30–60 minutes with basic tools.2
- Compatible with existing Shimano components such as front derailleur and brakes.2
- Campagnolo-inspired ergonomics with a long thumb lever are comfortable and accessible.1
- Provides a gear range easier than 1:1 with a 36T cassette, suitable for climbing.2
- All components held up well over approximately 500km of use.1
- Ideal for beginner, guest, winter, training, or city bikes due to low cost and simplicity.12
Cons
- Thumb shifter design prevents shifting to harder gears while sprinting or descending.2
- Weak rear derailleur spring leads to poor chain retention and chain slap; not suitable for off-road use.1
- Very heavy overall, with a heavy solid steel cassette.1
- Fit and finish is not premium, with rough edges and cheap-feeling materials.1
- More difficult to index and dial in than Shimano 105 or Di2; requires precise quarter-turn adjustment to avoid skipping under load.12
- Lack of inline adjusters makes front derailleur tensioning difficult.2
- Brake calipers are very basic (Z race BR001).1
Key Facts
- Price: approximately £62–£73 (yt:672) or €111 (yt:1635) for the complete groupset including shifters, derailleurs, brakes, cassette, and chain, but excluding crankset.12
- Included components: shifters, front derailleur, rear derailleur, ZRACE BR001 brake calipers, ZRACE 10-speed chain, and 11-32T cassette (yt:672); the €111 bundle includes derailleurs, 10-speed chain, and 34T cassette (yt:1635).12
- Component weights: rear derailleur 273.6g, front derailleur 98.8g, right shifter with cable 264.7g, left shifter with cable and clamp 263.3g, brakes ~200g each, cassette 367.3g, chain 302.5g.1
- Rear derailleur officially supports up to 34T or 32T cassette, but works with a 36T cassette only if the B-screw is maxed out.2
- Shifters are compatible with the LTWOO GR7 gravel rear derailleur.1
- Compatible with Shimano 105 12-speed chainrings despite using a 10-speed chain.2
- Uses external cable routing, simplifying maintenance.2
- Installation requires a long 5mm Allen key to access the brake lever mounting bolt.2
Reviews & Ratings
11:27The reviewer discusses the LTWOO R7 2x10s Road Rim Brake Groupset (ST-R5110, previous generation) as a budget-friendly mechanical groupset purchased from AliExpress for around 111 €, used to upgrade an old aluminum rim-brake road bike for guest and city use. He notes its simplicity, compatibility with existing Shimano components, and good value, but criticizes the thumb shifter design that prevents shifting to harder gears while sprinting or descending, and mentions the need for precise adjustment.
15:07The reviewer purchased and tested the LTWOO R7 2x10 speed rim brake mechanical groupset from AliExpress for £62. They installed it on a Cannondale road bike and used it for several months through winter, including commutes and rides in the Peak District. They describe it as a complete groupset including shifters, derailleurs, brakes, cassette, and chain, requiring only a separate crankset. The reviewer is impressed by the extremely low price and functional shifting performance but notes significant drawbacks in weight, chain retention, build quality, and setup difficulty.
Where to Buy
LTWOO R7 2x10 Speed Road Bike Groupset 20S Mechanical Rim Brake Kit Compatible with Shimano Tiagra 4700 Sora R3000 ZRACE Caliper
Specifications
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