The BXT GRAVEL 135 is a budget carbon gravel frameset that offers impressive value, with complete framesets (frame, fork, handlebar, seatpost, headset) costing around €500-£300 and full builds coming in under €1,900-2,000. Owners consistently praise the finish, paint quality, and ride feel, with several reporting thousands of kilometers without cracks or major issues. However, it requires significant assembly effort and often needs small fixes—particularly around the integrated handlebar gap, headset play, and tire clearance—so it suits patient builders rather than those wanting a plug-and-play frameset.
Pros
- Excellent value for money: complete frameset around €534/£300, full builds from €1,850–€1,900123
- Good paint quality and clean finish with no defects or blemishes; visible carbon weave12
- Durable in real-world use: no cracks, strange noises, or loosening after 2,000 km and 6 months4
- Comfortable geometry and vibration dampening; carbon frame and seatpost absorb rough roads43
- Lightweight builds achievable: 8.8 kg without top bag, 9.9 kg with accessories56
- Threaded BB68 bottom bracket simplifies installation and avoids press-fit tools1
- UDH derailleur hanger and compatibility with modern groupsets including SRAM AXS, Shimano GRX, and electronic shifting17
- Handles mixed terrain well, including single track and rooty trails, with a fun and aggressive ride quality47
- BXT customer support responsive: sent replacement centering ring free of charge to resolve headset issue1
Cons
- Integrated handlebar gap is a common issue requiring modification (grinding split ring, thinner bearing, or slotted spacers)81
- Headset play can be difficult to eliminate; requires extra centering ring (6.6 mm) and careful adjustment15
- Tire clearance limited: 47 mm rear is tight, 50 mm leaves only 2.5–3 mm per side; not suitable for muddy conditions with larger tires97
- Significant assembly time and trial-and-error required, especially for inexperienced builders65
- Minor quality issues: paint overspray on bottom bracket and thru-axle, basic packaging with no fragile markings, one headset bearing not pressing in fully2
- Handlebar internal openings too small for brake lines, requiring rework1
- Included bottle cages are weak and may not securely hold bottles or tools9
- Other paint colors cost €150–200 more; glossy black is the cheapest option1
Key Facts
- Frameset price around €534 (final €538.11 after shipping/discounts) or approximately £300; full builds reported at €1,850–€1,900123
- Measured frame weight roughly 1.3 kg on uncalibrated luggage scales; complete builds range from 8.8 kg to 9.9 kg depending on components256
- Tire clearance: officially 45 mm rear and up to 50 mm front; users report 47 mm fits tightly at the rear and 50 mm leaves only 2.5–3 mm per side974
- Seatpost diameter 27.2 mm round; bottom bracket is threaded BB68 (not press-fit); rear derailleur hanger is UDH91
- Thru-axle standards: 12x100 mm front, 12x142 mm rear; flat mount brakes9
- Stock headset bearing thickness 7 mm; thinnest compatible bearing found is 6.5 mm, and a 6.6 mm centering ring is needed to eliminate headset play81
- Compatible with both mechanical and Di2 shifting; frame is T1000 carbon1
- Includes carbon fork, full carbon seatpost, integrated aero handlebar, headset, spacers, expander, thru-axle, bearings, and seat clamp12
Sources
- 1JULEZ | CYCLING3 sources
- 2Cus Baker£319 Carbon Gravel Frame — Bargain or Big Mistake?
- 3r/ChineseCarbonbxt 135 gravel build
- 4Cycling, Cameras and Coffee.Hand-Built BXT Gravel Bike | 6 Months / 2,000km Update | Sensah SRX Groupset & Elitewheels ENT.
- 5r/ChineseCarbonnew built bike day
- 6r/ChineseCarbonbxt 135 gravel build grx 820 elitewheels slr
- 7r/gravelcyclingframe swap bxt 135
- 8ChinertownBxt gravel 135
- 9MTB-News[A]ufbau BXT 135 Gravel - low budget
Reviews & Ratings
34:27The reviewer introduces the BXT 135 Gravel carbon frame as the first and most important part of his budget AliExpress gravel bike build. He notes it is a T1000 carbon frame in size 58 with 45C tire clearance, compatible with both mechanical and Di2 shifting, and comes with a carbon fork, carbon seatpost, integrated aero handlebar, headset, spacers, and expander. He chose glossy black because other colors cost 150-200 euros more, and states the finish and workmanship look very good with no scratches or flaws found, including inside the fork. He mentions standard thru-axles and a UDH for the derailleur, and notes he is somewhat worried about routing cables through the integrated handlebar but is confident. He also notes carbon parts must not be over-clamped and require carbon paste.
23:24The reviewer builds up a BXT 135 gravel frame from AliExpress. He notes it uses a UDH derailleur hanger, a threaded BB68 bottom bracket rather than press-fit, and that he had to contact BXT support over a headset issue. The supplied 6.4 mm centering ring did not fit the stem properly, so BXT sent a 6.6 mm ring, after which the headset play could be adjusted correctly. He also mentions reading in forums that setting headset play on this type of frame can be difficult, and he is cautious not to damage the frame while tightening the bottom bracket.
17:39The reviewer presents the BXT 135 Gravel frameset as the first and foundational component of his AliExpress gravel bike build. He notes that it was ordered with a handlebar, fork, seatpost, headset, and spacers for €534, with a final total of €538.11 after shipping and discounts. He describes the frame as very beautiful with good paint and no defects, but mentions two issues: he had to order an extra centering ring (6.6 mm) to achieve a play-free fit, and the handlebar's internal openings were too small for the brake lines, requiring some rework. Despite these challenges, he is very satisfied with the frame and the final build, and would build it again.
14:10The reviewer has been using the BXT GRAVEL 135 carbon frame for over 6 months and 2,000 km. They report being very impressed with its durability, comfort, and performance across various terrains.
15:46The reviewer purchased a BXT gravel bike frame for approximately £300 after searching for the cheapest options. They unbox and examine the frame, noting it arrived in 4-5 weeks. The packaging was basic but protective. The frame is a matte-painted carbon model called the 'Gravel 135' with a UDH rear derailleur hanger, includes a seat post, handlebars, fork, and all necessary accessories like a thru-axle, bearings, and seat clamp. They are generally impressed with the initial quality for the price, noting the carbon weave is visible, the frame feels solid, and it has 50mm tire clearance. However, they note minor issues like paint overspray, a questionable headset bearing measurement printed on the frame, and a potentially loose bearing fit. They plan to build it with parts from their current bike to test ride it.
The BXT 135 gravel build by user NicBy features a Chinese carbon frame with electronic groupset and 50mm wheels, costing 1850 euros. The build received positive feedback on Reddit, with users discussing components like Wheeltop groupset and CSC wheels.
AI Summary
Pros
- Affordable total cost of 1850 euros
- Electronic shifting (Wheeltop GeX) performs as well as Di2
- CSC wheels are maintenance-free after 3000km
more pros in the review
Cons
- Import taxes not included in total cost (question raised)
- Some users experienced brake mount alignment issues (not OP)
- Battery charge on Wheeltop may not hold well (hearsay)
Key Points
- Frame: BXT 135 black matte (nearly 1:1 replica of Scott Addict Gravel)
- Groupset: Wheeltop GeX (electronic)
- Cassette: Goldix 11-52
more key points in the review
A user built a BXT GRAVEL 135 bike with Chinese carbon components, reporting it as an enjoyable, sub-9kg machine despite being new to cycling and encountering minor assembly issues.
AI Summary
Pros
- Lightweight build under 9kg
- High-quality components (Elitewheels, LTwoo ERX groupset)
- Positive riding experience
more pros in the review
Cons
- Headset play requiring makeshift fixes
- Front brake movement under load
- Potential headset bearing exposure to dirt
more cons in the review
Key Points
- Frame: BXT GRAVEL 135
- Weight: 8.8kg without top bag
- Wheels: Elitewheels ENT 50mm disc
more key points in the review
A user shares their experience with the BXT Gravel-135 frameset, detailing a frame swap from a Carbonda 696 to the BXT 135, resulting in a lighter build at just over 20 lbs. They discuss the bike's geometry, tire clearance, and component compatibility, noting it's a temporary frame with plans to upgrade to an Enve Mog or Rodeo Traildonkey. Other users inquire about sizing, chainring capacity, and ride quality, with positive feedback on its performance and handling.
AI Summary
Pros
- Lightweight build (just over 20 lbs)
- Good geometry for taller riders with a shortened seat tube and sloped top tube
- Fun and aggressive ride quality, suitable for racing
more pros in the review
Cons
- Limited tire clearance (max 47c, tight fit for 50c tires)
- Not a long-term frame for the user, who plans to upgrade
- Potential headset adjustment issues reported by another user
more cons in the review
Key Points
- Frame: BXT Gravel-135, size 56cm
- Max tire size: 47c, with tight clearance for larger tires
- Chainring compatibility: up to 44t likely, 46t may be pushing it
more key points in the review
A user built a BXT 135 gravel bike using a Chinese carbon frame paired with Shimano GRX 820 components and Elitewheels SLR wheels, achieving a total weight of 9.9 kg at a cost of approximately €1900. The build required significant assembly effort including headset installation, cable routing, and brake bleeding.
AI Summary
Pros
- Lightweight at 9.9 kg including accessories
- Cost-effective build at around €1900
- High-quality Shimano GRX 820 drivetrain and brakes
more pros in the review
Cons
- Significant assembly time and trial-and-error required
- Reliance on low-cost Aliexpress parts for accessories
- Unclear long-term durability of frame and components
more cons in the review
Key Points
- Frame: BXT 135 Gravel carbon frame
- Drivetrain: Full Shimano GRX 820 2x12-speed (48/31 crankset, 11-36T cassette)
- Wheels: Elitewheels SLR Gravel (38mm rim, 25mm internal width)
more key points in the review
The BXT GRAVEL 135 is a budget-friendly carbon gravel frame from AliExpress, typically priced around €540-€570 including shipping. It features a 27.2mm round seatpost, flat mount brakes, and clearance for up to 45mm tires at the rear and 50mm at the front. The frame is well-finished with clean carbon layup. Users appreciate the value but note that the included bottle cages are weak and the frame may require careful tire sizing.
AI Summary
Pros
- Excellent value for money, low price for a carbon frame
- Good build quality and clean paint finish
- Lightweight and responsive ride with carbon wheels
Cons
- Included bottle cages are weak and may not hold tools or bottles securely
- Rear tire clearance limited to 45mm; 47mm not possible
- Steerer tube spacers are not split, requiring custom solutions
Key Points
- Frame material: Carbon
- Seatpost diameter: 27.2mm round
- Brake mount: Flat mount
more key points in the review
Based on forum discussions, the BXT GRAVEL 135 is a gravel bike that users have built up for winter/mudguard use. Several users report a common issue with a gap in the integrated handlebars, which some have addressed by modifying components like bearings and split rings. The bike appears functional for builds, with at least one user reporting no problems during assembly.
AI Summary
Pros
- Suitable for winter/mudguard bike builds without major assembly issues
- Integrated handlebar gap issue does not seem to affect performance or bearings according to some users
Cons
- Common issue with large gap in integrated handlebars requiring modification
- Stock bearing thickness (7mm) may contribute to handlebar gap issue
- One fork failure was reported; owners consider it a dud rather than a pattern for this popular frame.
Key Points
- Integrated handlebars
- Stock bearing thickness: 7mm
- Thinnest compatible bearing found: 6.5mm
Where to Buy
| Rating | ||||
|---|---|---|---|---|
aliexpress.com#1005004671491800Affiliate · MyBikeParts BXT Official Store4.7/5 · 97% positive | 4.9(73)319 sold | |||
aliexpress.com#1005004622346065Affiliate · MyBikeParts BXT Official Store4.7/5 · 97% positive Price last checked 2 months ago | 4.8(22)112 sold | |||
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