3T Ultra 650b GRX 1x12

Name: 3T Ultra 650b GRX 1x12
Brand: 3T

2024 RoadGravel Manufacturer page

Last known price: $4,499

Prices shown first for United States
Suspension: Rigid
Wheels: 650b
Drivetrain: 1 × 12 40t / 10–51t
Gear range: 510%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

48cm 145–160
51cm 157–171
54cm 168–180
56cm 176–186
58cm 183–195
61cm Not informed

Components

11 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

Fango Ultra w/ compact crown Not identified

Drivetrain

5 parts

Cassette
- Shimano Deore CS-M6100-12 12 speeds 10–51t
CS-M6100-12
Crankset
- Shimano GRX FC-RX610-1 12 speeds 40t
FC-RX610
Front derailleur

None
Rear derailleur
- Shimano GRX RD-RX822-SGS 12 speeds
RD-RX822-SGSRD-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

Integrated headset, sealed cartridge 1-1/8"+1.5", 36° Not identified
Saddle
- Selle Italia MODEL X Superflow
Seatpost
- 3T
Stem
- 3T

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 54cm

Table

Reach 373mm

Stack 564mm

Wheelbase 1009mm

Head angle 71.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 650b wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	351	362	373	381	388	399
Stackmm	520	542	564	584	604	632
Top tube lengthmm	510	527	545	559	574	593
Seat tube lengthmm	436	463	490	518	549	576
Head tube lengthmm	122	142	158	175	196	225
Head tube angle	68.5°	69.5°	71°	72°	72.5°	72.5°
Seat tube angle	74°	74°	74°	74°	74°	74°
Chainstay lengthmm	419	419	419	419	419	419
Wheelbasemm	1003	1013	1009	1014	1024	1044
Front centermm	597	606	602	607	616	636
Bottom bracket dropmm	79	79	77	77	75	75
Fork rakemm	62	61	53	54	54	55
Trailmm	63	58	58	50	47	46
Stack/reach ratio	1.48	1.50	1.51	1.53	1.56	1.58

Not published by the manufacturer: Bottom bracket height, 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: 51
Lowest gear: 21.6 in
Highest gear: 110.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire clearance: Maximum tire width: 51c
Tire width: 2.1″
Wheel material: Aluminum
Wheel size: 650b

Technical analysis

3 measures

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

Lowest gear

21.6 gear inches

This value is below 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

110.0 gear inches

This value is below 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: 8.3 km/h
Highest gear: 42.1 km/h

Total gear range 510%

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: 21.6–110.0 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 Ultra 650b GRX 1x12	3T Ultra 650b Apex Eagle 1x12	3T Ultra 700c Apex Eagle 1x12	3T Ultra 650b Apex XPLR AXS 1x12	3T Ultra 700c Apex XPLR AXS 1x12	3T Ultra 650b Force D1 Eagle AXS 1x12
Drivetrain
Smallest chainring	40	40	40	40	40	42
Largest chainring	40	40	40	40	40	42
Smallest sprocket	10	11	11	11	11	11
Largest sprocket	51	50	50	44	44	50
Lowest gear	21.6 in	22.0 in	23.2 in	25.0 in	26.4 in	23.1 in
Highest gear	110.0 in	100.0 in	105.5 in	100.0 in	105.5 in	105.0 in
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Electronic	Electronic
Other specifications
Tire clearance	Maximum tire width: 51c	Maximum tire width: 51c	Maximum tire width: 51c	Maximum tire width: 54c	Maximum tire width: 54c	Maximum tire width: 54c
Tire width	2.1″	50c	40c	2.1″	40c	2.1″
Wheel size	650b	650b	700c	650b	700c	650b
Bottom bracket standard	Not informed	Not informed	Not informed	BB86/BB92	BB86/BB92	Not informed