The TanTan TT-X38 is a budget Chinese carbon aero frameset that offers impressive speed and value for around $580–$700, with a T47 bottom bracket and full internal cable routing. However, it is not without compromises: quality control varies, the ride can be harsh on rough roads, and it lacks the refinement of more expensive frames. It suits riders seeking an affordable aero race bike, but those wanting an all-rounder or flawless finish may be disappointed.
Pros
- Very fast in a straight line and on descents, with excellent aerodynamic performance.12
- Good value for money; frameset costs around $580–$650 including shipping.12
- Stiff bottom bracket area provides good power transfer.1
- Tire clearance is ample, fitting up to 32c (measured 32.5mm) and possibly 34c depending on rim width; one user fits 36mm for bikepacking.13
- Comfortable ride with 30mm tires; some users find it very comfortable.1
- Easy to build and work on, with standard parts like T47 bottom bracket and flat-mount brakes.1
- Lightweight for an aero frame; complete builds can be under 8kg.1
- Unique look compared to other Chinese frames, resembling the Scott Foil RC Pro.2
Cons
- Quality control issues: headset bearing play, rough internal routing, brake mounts needing facing, and occasional steerer tube irregularities.1
- Harsh ride on rough roads due to overly stiff rear end; not comfortable for long days on poor surfaces.12
- Not well-suited for climbing; feels sluggish and less nimble when standing on steep climbs.1
- Seatpost slipping and water ingress into seatpost wedge; bolts rust quickly.1
- Headset bearings are low quality and prone to rust; may need replacement.1
- Front derailleur hanger sits far inboard, making FD setup difficult with some cranksets.1
- Steep seat tube angle limits setback; riders needing setback may run out of room.12
- Fork dropout spacing can be out of spec (102–103.3mm), causing wheel play or need for shimming.1
Key Facts
- Frame weight: approximately 1050–1173g depending on size and paint.12
- Fork weight: 385–430g uncut; seatpost: 221–225g; integrated handlebar: 367–377g.1
- Bottom bracket: T47 threaded, 86mm width.12
- Tire clearance: up to 32c (measured 32.5mm) on 23mm internal rims; some users fit 34c, and one reports 36mm for bikepacking.13
- Thru-axle: front 100x12mm, rear 142x12mm; fork dropout spacing can be out of spec (102–103.3mm).1
- Price: frameset around $580–$650 including shipping; one reviewer paid $700 including shipping.12
- Cable routing: fully internal through headset and handlebar.12
- Geometry: aero road with steep seat tube angle (73–74+ degrees), long reach, low stack; available sizes 49, 52, 54, 56, 58.12
Reviews & Ratings
23:52The reviewer discusses the Tantan X38 Aero frame set extensively throughout the video. They highlight its super aero profile, lightweight construction (approximately 1100 grams unpainted), and affordable price point of around $700 including shipping. The frame is described as unapologetically aero, resembling the Scott Foil RC Pro, and offers a comfortable ride despite its aggressive look. The reviewer mentions the frame's geometry is suitable for most people but notes it lacks refinement over rough roads compared to more expensive frames. They also discuss the frame's compatibility with various components, including a T47 bottom bracket and hidden cable routing.
A user built a TanTan TT-X38 road bike with custom modifications including an Erzero dropbar system with tribar mount support, XMCS rims, and a single chainring setup. The bike is being used for bikepacking and touring, with the owner planning a 2.5-month trip to Japan.
AI Summary
Pros
- Can fit 36mm tires for bikepacking comfort
- Erzero dropbar system cleans up cockpit and allows easy tribar attachment/detachment
- XMCS rims are stiff, light, and handle crosswinds well
more pros in the review
Cons
- Single chainring setup (48T) may be too large for steep hills
- Aggressive road bike position may be uncomfortable for some bikepackers
- Erzero handlebar availability limited (primarily on Taobao)
more cons in the review
Key Points
- Frame: TanTan TT-X38 (Chinese carbon)
- Tire clearance: Up to 36mm
- Drivetrain: Single chainring (48T) with SRAM Rival AXS RD 12-speed and 11-36 cassette
more key points in the review
The TanTan TT-X38 is a budget Chinese carbon aero road frameset, often compared to the Scott Foil. It is sold by TanTan (Seraph Store) and also by other sellers such as Sequel Sports (Ceccotti) under the model name DCFR26. The frameset typically includes frame, fork, integrated handlebar/stem, headset, spacers, and seatpost. Prices range from around $580 to $650 USD including shipping. Frame weight is approximately 1050-1173g, fork around 385-430g, seatpost around 221-225g, and handlebars around 367-377g. The frame features a T47 bottom bracket, internal cable routing, flat-mount disc brakes, and clearance for tires up to 32-34mm (measured width). It is designed with aero tube shapes, a steep seat tube angle, and a stiff bottom bracket. Users report that it is very fast in a straight line and on descents but can be harsh on rough roads and less comfortable for climbing. Quality control varies, with common issues including headset bearing play, rough internal routing, brake mount facing, and occasional steerer tube irregularities. The frame is popular among budget-conscious builders seeking an aero race bike, but it is not considered an all-rounder.
AI Summary
Pros
- Very fast in a straight line and on descents, with excellent aerodynamic performance.
- Stiff bottom bracket area provides good power transfer.
- Good value for money; frameset costs around $580-$650 including shipping.
more pros in the review
Cons
- Quality control issues: headset bearing play, rough internal routing, brake mounts needing facing, and occasional steerer tube irregularities.
- Harsh ride on rough roads due to overly stiff rear end; not comfortable for long days on poor surfaces.
- Not well-suited for climbing; feels sluggish and less nimble when standing on steep climbs.
more cons in the review
Key Points
- Frame weight: approximately 1050-1173g (size 52-54, unpainted/painted).
- Fork weight: 385-430g (uncut, with axle).
- Seatpost weight: 221-225g.
more key points in the review
Where to Buy
TanTan Cycling Aero Road Bike carbon Frame TT-X38 T47 Thread Racing Bicycle Full Hidden Cable Available
TanTan Aero Road Bike Frame TT-X38 T47 Thread Racing Bicycle Full Hidden Cable Available Size 47/49/52/54/56/58cm
TanTan Red Water Ripple Paint Carbon Fiber Disc Brake Road Bike Frame TT-X38 stem+handlebar Max Tire 700X32C
TanTan Chameleon Paint Full Hidden Cable T47 Thread Disc Road Bike Frame TT-X38 Available 47/49/52/54/56/58cm Size
Specifications
Attributes
Included Components
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Sizing & fit
1Compatibility
5Build & setup
4Ride & performance
3Durability & quality
1Finish & options
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