Frameset
Frame
3T Primo2 UDH — unidirectional pre-preg carbon, high-modulus/high-strength performance blend layup
Fork
3T Fango Primo2
Primo 2 Wpnt GRX 1x12
The 3T Primo2 WPNT is the latest version of 3T’s aero-gravel race platform, carrying forward the Exploro/Primo concept while updating it for current expectations around integration and drivetrain compatibility. The most visible change is the new Semi-Integrale front end, which hides the cables without going to a fully closed, hard-to-service setup. That makes the bike cleaner in appearance and more in step with the premium gravel market, while preserving one of 3T’s long-running priorities: combining aerodynamic shaping with practical all-road and gravel use.
Underneath that update, 3T has deliberately left the bike’s core character intact. Geometry is unchanged from the previous platform, and tire clearance remains capped at 700c x 45mm WAM, with the frame optimized around roughly 35-45mm tires. The addition of SRAM UDH is an important functional revision, opening the door to newer drivetrain options including SRAM Full Mount XPLR systems. In the market, the Primo2 sits squarely in the fast gravel segment: it is not trying to be a high-clearance adventure bike or a progressive, rough-terrain gravel machine, but rather a performance-oriented design aimed at riders who prioritize speed, efficiency, and a road-influenced ride feel on mixed surfaces.
$4,899Gen Primo2
Build
Size
Inventory
| Stack | 575mm |
| Reach | 390mm |
| Top tube | 571mm |
| Headtube length | 150mm |
| Seat tube length | 518mm |
Fit and geometry
The Primo2’s geometry reflects its race-oriented gravel intent. Reach figures of 366mm in S, 378mm in M, 390mm in L, and 402mm in XL are paired with relatively moderate stack numbers from 517mm to 604mm, producing a fit that is more performance-focused than upright. 3T says the frame geometry itself is unchanged from the previous generation, but the new cable-routing arrangement effectively raises handlebar height by about 15mm, slightly softening the front-end drop and making the fit a bit less aggressive than before.
Handling numbers point to a bike that stays close to road-derived gravel behavior rather than pushing into long, ultra-stable geometry. The 415mm chainstays are short by gravel standards and help keep the rear end compact and responsive. Head tube angles range from 69.5 degrees in S to 72.5 degrees in L and XL, with wheelbases from 996mm to 1032mm, suggesting size-specific front-end behavior while maintaining a quick, efficient overall chassis. A consistent 70mm bottom bracket drop keeps the rider reasonably planted without making the bike especially low-slung. Taken together, the numbers support a bike built for speed, sharp acceleration, and precise steering on smoother gravel and mixed-terrain routes.
Full specs
Groupset
Shift levers
Shimano GRX ST-RX610, 12-speed (shift/brake levers)
Rear derailleur
Shimano GRX RD-RX822 GS RD+, 12-speed
Cassette
Shimano Deore CS-M6100-12, 12-speed, 10-51T
Chain
null
Crankset
Shimano FC-RX610-1, 40T, 12-speed (S&M: 170mm; L&XL: 172.5mm)
Bottom bracket
null
Front brake
Shimano BR-RX400 hydraulic disc
Rear brake
Shimano BR-RX400 hydraulic disc
Front rotor
Shimano SM-RT64 160mm
Rear rotor
Shimano SM-RT64 160mm
Wheelset
Front wheel
Fulcrum Rapid Red 900 700c or Fulcrum Racing 600 700c
Rear wheel
Fulcrum Rapid Red 900 700c or Fulcrum Racing 600 700c
Front tire
Pirelli Cinturato Adventure 700×45 or Vittoria Terreno T30 Sport 700×40
Rear tire
Pirelli Cinturato Adventure 700×45 or Vittoria Terreno T30 Sport 700×40
Cockpit
Stem
3T APTO with semi-integrale spacer kit (S: 80mm; M: 90mm; L: 100mm; XL: 110mm)
Handlebars
3T Superergo Pro (S&M: 40cm; L&XL: 42cm)
Saddle
Fizik Vento Argo X5, 140mm
Seatpost
3T Primo setpost for Ritchey clamp
Grips
3T Prendo Tough (bar tape)
Builds
The Primo2 WPNT range starts with the GRX 1x12 build at $4,899, then moves to a Rival XPLR AXS 1x13 build at $6,399, with the top Rival XPLR AXS 1x13 Discus 40|30 model priced at $7,599. Even from the build names alone, the lineup is clearly structured around a mechanical entry point and two progressively more premium SRAM electronic options, with the upper tiers centered on the newer 1x13 XPLR format.
The most notable jump is from the base GRX build to Rival XPLR AXS, where buyers are paying for wireless electronic shifting and the updated drivetrain ecosystem enabled by the frame’s UDH compatibility. The top Discus 40|30 version appears positioned as the more performance-focused package, adding a premium wheelset designation on top of the same Rival XPLR AXS 1x13 foundation. Based on the listed builds, the range is tightly focused: there is no broad touring or budget spread here, just a clear progression for riders choosing between a lower-cost mechanical setup and increasingly race-oriented electronic builds.
Wpnt GRX 1x12
$4,899
Selected
Wpnt Rival XPLR AXS 1x13
$6,399
Wpnt Rival XPLR AXS 1x13 Discus 40|30
$7,599