Key Features & Specs
- Frame Material: T1000 carbon fiber with EPS molding
- Frame Weight: ~950g (size 54, unpainted)
- Fork Weight: ~370g
- Geometry: Race-leaning all-rounder with a 73° head angle, 412mm chainstays, and a stack-to-reach ratio of ~1.43
- Bottom Bracket: T47 threaded
- Seatpost: Proprietary aero seatpost included
- Brake Mount: Flat mount disc
- Axles: 12x100mm front, 12x142mm rear
Longteng uses EPS (Expanded Polystyrene) molding on this frame, which results in clean internal walls, better carbon compaction, and minimal resin pooling. This translates to a more precise, durable frame with a high-end feel typically seen on far more expensive brands.
Geometry Breakdown
The RD301-D offers a geometry that’s aggressive enough for race use but stable enough for all-day rides. Compared to other popular Chinese frames, its stack/reach ratio is slightly more race-leaning than the Winspace SLC 2.0 and slightly less aggressive than the Velobuild 168. Riders in the thread described the fit as “balanced and quick,” with confident descending and snappy acceleration when sprinting out of the saddle.
Chainstays are short at 412mm, keeping the rear end stiff and responsive. The bottom bracket height and head angle provide a good mix of agility and predictability, making it a strong choice for criterium riders and fast group rides alike.
Real-World Builds & Rider Impressions
Forum members building on the RD301-D have shared overwhelmingly positive experiences. Many praised the fit and finish, noting that the paint quality was “better than expected” and the frame required little to no chasing or sanding. The EPS molding results in smooth internals that make cable routing straightforward—even for full internal setups.
Several riders built the frame with groupsets like SRAM Rival AXS, Shimano 105 Di2, and even mechanical setups. Tire clearance appears to be around 32mm with room to spare, depending on rim width. One user reported building with 32mm GP5000s on 25mm internal rims with no clearance issues.
In terms of ride feel, the RD301-D has been described as stiff in the right places—particularly under power—but still comfortable over rough pavement. Multiple builders used it for both race and endurance purposes, reporting that it held up well for 100+ mile days and hard intervals alike.
Strengths Noted by Riders
- Excellent carbon layup and internal finish due to EPS molding
- Clean aesthetics and modern design language
- Comes with a matching aero seatpost and headset
- Strong value for the ~$400–$500 range (frame + fork + extras)
- T47 bottom bracket offers durability and wide compatibility
- Good real-world tire clearance (28–32mm supported)
Minor Caveats to Know
While most rider feedback was positive, a few minor considerations came up. The aero seatpost uses a single-bolt clamp, which some users found less adjustable than preferred. A few builders also noted that while the headset and hardware were included, the instructions were minimal—something typical with factory-direct frames. No major alignment or QC issues were reported, which is a strong endorsement for Longteng’s production standards.
Where to Buy & Learn More
The RD301-D is available through Longteng’s official channels, and occasionally through direct Alibaba/AliExpress storefronts. Pricing varies depending on finish and package, but full kits including frame, fork, seatpost, and headset often land in the ~$450 range.
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Final Verdict
The Longteng RD301-D offers an impressive blend of ride quality, modern specs, and clean construction, all wrapped in a sub-$500 package. Thanks to EPS molding, refined geometry, and thoughtful design, it’s a strong contender for riders who want a race-capable carbon frame without paying for a big brand name. Whether you’re building your first road bike or upgrading to a modern, efficient platform, the RD301-D deserves serious consideration.