All Reviews

The LTWOO eRX/eR9 (V3) is a Chinese electronic road groupset known for its low price, typically $300-$500 USD on AliExpress with coupons, though recent pricing has been inconsistent (e.g., 80 Designer Store charging 530€ + 114€ shipping for an ER9 without brakes). It features 11/12-speed compatibility, hydraulic disc brakes using mineral oil, and replaceable 14500 batteries. Key attributes include: price around $300-$500, weight varies by model (eR9 alloy, eRX carbon; eR7 is a mid-tier option), and it uses standard road standards with compatibility for various cassettes (up to 34T with modifications, and some users run 11-42T with 46/30 chainrings) 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. A recurring issue is the groupset suddenly becoming unresponsive mid-ride, requiring a brief charger connection to 'wake up' the system. This is often caused by the battery holder slipping inside the seatpost, triggering BMS protection. Users recommend securing the battery holder with rubber mounts or bubble wrap. Additionally, the groupset does not support USB-C to USB-C (PD) charging; only USB-A to USB-C cables or OTG adapters work. Shifting performance is significantly improved with Shimano cassettes and chains, while aftermarket Chinese cassettes may cause hesitation. The groupset continues to mature, with newer versions featuring lighter brake calipers (about 70g lighter per caliper) and improved compatibility. A major recent update (June 2026) reintroduced auto-trimming for the front derailleur, which automatically adjusts to prevent chain rub and works on many firmware versions via app update. However, auto-trim has mixed results: some users find it works great, while others report aggressive trimming causing chain drops, especially in big chainring/largest cog combinations. The 'First Aid Kit' option in the app is a new but undocumented feature. Users report ongoing challenges: non-standard batteries (e.g., 1000mAh or 1500mAh) can cause failure to wake up; the battery holder can break when inserting tight batteries, and some holders crack even with the smallest 14500 cells; water ingress can still occur in V3/ER7 versions, causing rear derailleur failure after rain; and firmware updates can still brick components. Customer support remains poor, with reports of LTWOO representatives becoming defensive when criticized, and spare parts availability is extremely poor—LTWOO may discontinue production of parts (e.g., shifter housings) within a year of version release, leaving customers unable to repair. V3 is not backwards compatible with V1/V2 components. Some users report chain skipping on specific gears under load, requiring fine micro-adjustment. Gear protection may no longer prevent shifting to the small chainring while in the 11 and 12 cogs after the auto-trim reintroduction. The new fully wireless eGR groupset with integrated battery is not yet released as of mid-2026. Despite these issues, the groupset offers excellent value for DIY enthusiasts willing to troubleshoot, and some users report no problems after thousands of kilometers. LTWOO eRX TT was used by a professional team at a Tour de France Femmes stage, indicating some pro-level adoption. The eR7 rear derailleur exists in at least two versions (one Shadow-style, one with short connection), which can cause confusion. Overall, the groupset is a viable budget option for those who accept the risks and are willing to secure the battery holder, use Shimano cassettes/chains, and potentially seal cables with silicone or liquid electrical tape.

The Quick Pro ER:ONE is an aerodynamic road bike frameset praised for its competitive pricing compared to Western brands, with complete bikes starting around $5,700 USD for Dura-Ace builds and framesets costing approximately $2,400 USD (with occasional 10% discounts). It features a carbon frame with CFD optimization, T47 bottom bracket, UDH (Universal Derailleur Hanger), and tire clearance up to 700x30mm (max 32mm rear confirmed by users, though some report fitting 34mm tires with adequate clearance). The frame weight is around 1,000g for size M (999g reported), with the fork weighing about 480g. Users highlight its stable handling, smooth ride quality, and aggressive styling similar to the Scott Foil, with recent reports confirming excellent performance in windy conditions using deep-section wheelsets. Custom paint options are available for an additional fee, offering personalized aesthetics with transparent finishes (e.g., red, green) that show the carbon underneath; the 'Night Dark' color is glossy raw carbon. The brand sponsors professional cycling teams, adding credibility. However, concerns include limited resale value, potential bottle cage compatibility issues with larger bottles rubbing the downtube (though Giant Propel aero cages can fit 950ml bottles), and some minor build challenges like rear derailleur clearance on the smallest cog. The stock integrated handlebar has a low stack height, which some users find too aggressive, leading to recommendations for aftermarket riser bars; however, it is possible to use a traditional stem/bar combo by adding a round spacer on top of the stock spacers. Aftermarket parts like Bikone or Novaride bottom brackets are suggested for the T47 interface, and dealers in Europe (e.g., Ruben Bike in Portugal) provide tax-free shipping and support. Cable routing is generally reported as easy, though aftermarket cockpits with wider channels are available if needed. Users have built lightweight bikes (e.g., 6.6kg) with custom paint and deep-section wheels. SRAM crank compatibility is confirmed: standard (non-wide) cranks work with 50-54t chainrings, and for 13-speed setups a standard crank with 45mm chainline is recommended. Quick Pro offers a 15mm setback saddle post, and aftermarket options like Hylix zero offset seatposts allow more forward saddle adjustment; the Fairlight drop best road adapter also fits and allows 26mm extra forward movement. The frame is lighter than comparable Western models (e.g., Merida Reacto, Giant Propel) by about 150g, especially in raw glossy finish. The ER:ONE is available in local bike shops in some regions (e.g., Philippines), offering warranty and the ability to test the bike before purchase, which may justify a higher price compared to direct online purchase. A 3D-printed radar mount is available on Etsy, designed specifically for the ER:ONE. Prices are expected to increase by $100 on August 1, 2026, and discount codes may expire, so potential buyers should act soon.

The BiNavi Air is a slimmed-down, more affordable version of the popular BiNavi cycling computer from iGPSPORT. Key attributes mentioned by users include a price of approximately $196 USD (compared to $288 for the standard BiNavi), a smaller screen and battery, and OSM-based maps optimized by iGPSPORT. It supports features like custom workouts, TrainingPeaks integration, real-time tracking, and route simulation for indoor training. Recent firmware updates have added new data fields for cycling dynamics and breathing sensors, along with improved route customization options like choosable colors. The device is compatible with all radars, including Garmin models, and GPX route import generally works accurately for navigation. However, users report issues with altitude auto-calibration (which only works when moving), limited workout customization compared to competitors, software localization problems, and screen brightness that remains unchanged despite updates. The ecosystem is considered less mature than competitors like Bryton for features like climbPro functionality.

The Carbonda CFR-1056 is an endurance road frame, often compared to the Giant Defy and Canyon Endurace. It is designed for comfort on long rides with a relaxed geometry, internal or semi-internal cable routing options, and a focus on tire clearance. The frame is made from carbon fiber, with users reporting frame weights around 1050-1250g depending on size and paint. It uses a BB86 press-fit or BSA threaded bottom bracket (BSA became available later). The fork weight is around 480-520g. Pricing for the frameset (frame, fork, seatpost, clamp) starts around $490 USD for external routing and $650 USD for internal routing with an integrated handlebar, plus shipping and paint costs. Users highlight its value, good paint quality, and versatility for endurance riding and light gravel.

The Hudud Carbon Road Bike Crankset is a lightweight carbon crankset available in various lengths (e.g., 160mm, 165mm, 167.5mm) with 110x4 spider configuration. Users report a listed weight of 309g +/-10g but actual measured weight was 318g; the 167.5mm version with all hardware weighs 308g, while the 165mm arms and spindle weigh 180g. The spindle features innovative weight reduction design with a larger bore diameter between threaded ends. The carbon finish is described as nice satin with visible weave and simple branding. However, significant compatibility issues exist with Shimano chainrings, particularly with the spider diameter being incorrect (95-96mm vs Shimano's 94mm), preventing proper fitment of DA chainrings. The vendor has been unresponsive in resolving this issue over several weeks, and some users have returned the crankset due to the defective spider. Additional problems reported include a titanium spindle diameter that is slightly oversized, causing extremely tight fit or inability to insert into bottom brackets with solid aluminium caps (though plastic-capped BBs like Shimano may work). Some users experience crank arms loosening from the spindle and extremely tight left pedal threads. Lateral wobble/run-out of chainrings due to misalignment of the crank arm mounting face with the spindle has been reported, with some sets having significant run-out while others are acceptable. Manufacturing variations between sets affect quality and fitment. On the positive side, some users have had no issues over long rides (5-6 hours, 130-150km, 1600-2000m elevation), praising the finish and performance. The crankset can be paired with third-party power meters (e.g., Xcadey, Magene, Coospo) with some modification, such as filing the spider to fit the Easton spindle. Spacers are often needed to center the crankset, and the spindle length is at the minimum, requiring no spacers and adjustment ring bottomed out in some bottom brackets. Overall, the Hudud crankset offers a lightweight carbon option at a competitive price but suffers from inconsistent quality control and compatibility issues.