3T Primo 700c GRX 1x12

2024 RoadGravel Manufacturer page

Last known price: $3,399

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 12 40t / 10–45t
Gear range: 450%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 157–170
MD 168–180
LG 178–191
XL 188–201

Components

12 of 14 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Unidirectional pre-preg carbon, High-modulus/high-strength performance blend layup Not identified

Suspension

1 part

Fork
- 3T

Drivetrain

4 parts

Cassette
- Shimano Deore CS-M6100-12 12 speeds 10–45t
CS-M6100-12
Crankset
- Shimano GRX FC-RX610-1 12 speeds 40t
FC-RX610
Rear derailleur
- Shimano GRX RD-RX822-GS 12 speeds
RD-RX822-GSRD-RX822
Shifters
- Shimano GRX ST-RX610
ST-RX610

Brakes

1 part

Brakes
- Shimano GRX BR-RX400
BR-RX400SM-RT64

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Handlebar
- 3T
Headset

Sealed cartridge 1.125” - 1.5” Not identified
Saddle
- Selle Italia NOVUS Boost Evo
Seatpost
- 3T
Stem
- 3T

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 378mm

Stack 546mm

Wheelbase 1003mm

Head angle 71.1°

Seat angle 72.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	366	378	390	402
Stackmm	517	546	575	604
Top tube lengthmm	529	550	571	592
Seat tube lengthmm	463	490	518	545
Head tube lengthmm	101	125	150	180
Head tube angle	69.5°	71.1°	72.5°	72.5°
Seat tube angle	72.5°	72.5°	72.5°	72.5°
Chainstay lengthmm	415	415	415	415
Wheelbasemm	996	1003	1011	1032
Front centermm	591	598	606	627
Bottom bracket dropmm	70	70	70	70
Bottom bracket heightmm	279	279	279	279
Fork rakemm	50	50	50	50
Trailmm	77	67	58	58
Stack/reach ratio	1.41	1.44	1.47	1.50

Not published by the manufacturer: Standover height, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 45
Lowest gear: 25.8 in
Highest gear: 116.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 45c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

25.8 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2024
Sample: 1,716 bicycles with this information
Coverage: 76.6% of the class

Highest gear

116.0 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2024
Sample: 1,716 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

771 of 2,238 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2024
Sample: 2,238 bicycles with this information
Coverage: 99.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.9 km/h
Highest gear: 44.4 km/h

Total gear range 450%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 25.8–116.0 gear inches
Class reference (p10–p90): 23.2–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2024
Lowest gear: 1716 bicycles with this information, 76.6% of the class
Highest gear: 1716 bicycles with this information, 76.6% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2024 builds

Differences across 2024 builds
Specification	This bicycle 3T Primo 700c GRX 1x12	3T Primo 700c Apex XPLR 1x12	3T Primo 700c Apex XPLR AXS 1x12	3T Primo 700c Carbon Apex XPLR AXS 1x12	3T Primo Rival 1x11	3T Primo 700c Rival 1x11
Drivetrain
Smallest chainring	40	40	40	40	42	42
Largest chainring	40	40	40	40	42	42
Rear sprockets	12	12	12	12	11	11
Smallest sprocket	10	11	11	10	11	11
Largest sprocket	45	44	44	44	42	42
Lowest gear	25.8 in	26.4 in	26.4 in	26.4 in	29.0 in	29.0 in
Highest gear	116.0 in	105.4 in	105.5 in	116.0 in	110.7 in	110.7 in
Cockpit
Shifting	Mechanical	Mechanical	Electronic	Electronic	Mechanical	Mechanical
Other specifications
Tire width	45c	45c	40c	45c	Not informed	40c
Bottom bracket standard	Not informed	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92
Tire clearance	Not informed	Not informed	Maximum tire width: 54c	Not informed	Maximum tire width: 54c	Not informed