The VeloBuild VB-TT-023 is a well-regarded budget carbon TT frameset offering good stiffness and speed, but its stock cockpit has quality issues that often require upgrades.
Pros
- Good value for money, offering performance comparable to high-end brands
- Frame is stiff and fast, with users reporting personal records
- Well-packaged with quick shipping and good customer service
- Good adjustability in cockpit with multiple spacer options
Cons
- Stock stem prone to cracking or slipping, even when torqued to spec
- Stock aerobar extensions are short, flat, and lack side support
- Limited internal storage; no integrated bento box (rivets can be added on request)
- Quality control issues: missing parts, poorly finished fork steerers, incorrect saddle clamps
Key Facts
- T47 threaded bottom bracket with 86.5mm shell width
- Disc brake compatible, geometry similar to Trek Speed Concept
- Frame weight ~1515g, fork ~445g, complete builds ~20-21 lbs
Reviews & Ratings
The reviewer unboxes and examines a VeloBuild TT frame set, which they refer to as the 'VB tt23' and a collaboration project labeled 'cine concept X Val build'. They express excitement about the frame's design, paint job, and features. They note it is their first time building a TT bike and mention the frame's chunky, modern, 'RoboCop' aesthetic. They highlight the included components like carbon bottle cages, handlebars, and a painted seatpost. They are pleased to find a threaded T47 bottom bracket and note the clean brake mounts. They weigh the frame, fork, and handlebars, providing the recorded weights.
AI Summary
Pros
- The reviewer is 'very happy' and 'excited' about the frame.
- They love the custom 'disco' paint job and note the seatpost and stem are also painted to match for a 'nice solid unibody design'.
- They are 'happy about' the inclusion of three carbon bottle cages.
- They call the handlebars 'very nice full carbon TT bars'.
- They are 'very happy to see a threaded bottom bracket' and are 'pretty sure that it is also a t47 standard'.
- They describe the frame as 'one badass looking frame' and 'looks like RoboCop could be riding this'.
- They note the brake mounts are 'nicely faced' and 'super clean no scratches'.
- They state the frame weight of 1,515g is 'great for a frame that's this chunky'.
- They state the fork weight of 445g is 'quite okay'.
- They mention a positive history with VeloBuild, having purchased several frames from them in the past and being 'surprised and impressed by the low prices'.
Cons
- The reviewer mentions a past VeloBuild frame was damaged in a crash after 3-4 months and 'went straight into the bin', but this is not a critique of the current frame.
- They note building a TT bike will be a first for them with 'quite some surprises and learnings along the way', implying potential complexity, not a flaw in the frame.
Key Points
- The frame is a TT (time trial) frame.
- It is referred to as the 'VB tt23'.
- It features a collaboration paint job labeled 'cine concept X Val build'.
- The frame set includes: the frame, fork, seatpost, stem, handlebars, elbow pads, three carbon bottle cages, bolts, derailleur hanger, and other small parts.
- The bottom bracket is threaded and believed to be T47 standard.
- The frame has disc brake mounts.
- The frame weight is 1,515 grams.
- The fork weight is 445 grams.
- The handlebar weight is 767 grams.
- The seatpost has a texture to help prevent slipping.
The Velobuild VB-TT-023 is a Chinese carbon fiber time trial/triathlon frameset with a T47 bottom bracket (86.5mm shell width) and disc brake compatibility. It is often compared to the Trek Speed Concept in geometry. The frame is praised for being stiff, fast, and offering good value. The stock cockpit includes a basebar, stem, and aerobar extensions (described as a copy of Vision TFE), with adjustable stack via included spacers (5mm, 10mm, 20mm). Builds typically weigh around 20-21 lbs (9-9.5 kg). Common builds use SRAM AXS groupsets with wireless blips and hydraulic brakes like RideRever Triva. Users note the frame is well-packaged and shipping is often quick (e.g., 3-4 weeks to US/UK). However, the stock stem and cockpit have been sources of issues, leading many to upgrade to aftermarket options like TriRig Alpha One or Winow extensions. Velobuild now offers an updated alloy stem that reportedly solves handlebar flex. Other issues include seatpost slippage (one case of getting stuck), thru axle compatibility concerns (M12x1.5 vs UDH M12x1.0), and the need for longer stem screws to prevent tilting. Users have also shared solutions for Garmin mounting using 3D-printed parts and for using the Winow HB052 aerobar upside down to improve fit.
AI Summary
Pros
- Good value for money, offering performance comparable to high-end brands at a lower cost.
- Frame is stiff and fast, with users reporting personal records and high average speeds.
- Well-packaged with quick shipping and good customer service from Chris at Velobuild.
- Good adjustability in the cockpit with multiple spacer options and modular design.
- Compatible with aftermarket cockpits and components, allowing for customization.
- Updated alloy stem available from Velobuild which resolves handlebar flex issues.
Cons
- Stock stem is prone to cracking or slipping, even when torqued to spec, causing safety concerns.
- Stock aerobar extensions are short, flat (0-degree), and lack side support, leading many to upgrade.
- Limited internal storage; no integrated bento box (though rivets can be added on request).
- Quality control issues: missing parts, poorly finished fork steerers, incorrect saddle clamps.
- Cable routing for Di2 is challenging due to tight spaces and lack of junction box placement.
- Seatpost may slip and become stuck; one user reported seatpost slipping all the way to seatstays and getting wedged, requiring warranty claim.
- Stock handlebar flex is excessive for some users, causing trust issues even after stem replacement.
- Thru axle (165mm length) may not thread fully into UDH; UDH has M12x1.0 threads but stock axle is P1.5, potentially incompatible.
Key Points
- T47 bottom bracket (86.5mm shell width)
- Disc brake compatible
- Geometry similar to Trek Speed Concept
- Stock cockpit includes spacers (5mm, 10mm, 20mm)
- UDH (Universal Derailleur Hanger) compatible
- Frame weight not specified, complete builds ~20-21 lbs
- Max tire clearance claimed for 32c
- Internal cable routing
- Seatpost length ~400mm with ~120mm minimum insertion
- Updated alloy stem available from Velobuild
- Thru axle length 165mm, but UDH thread is M12x1.0 (stock axle may be P1.5)
Where to Buy
VeloBuild New T47 Carbon Fiber Time Trial Frame Set Disc carbon TT bike frame Integrated Cables
Velobuild VB-TT-023 New T47 Carbon Fiber Time Trial Frame Set Disc Integrated Cables Carbon TT Frame
Specifications
Attributes
Included Components
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