3T Extrema Italia Discus 45|40 GRX Di2 1x12

Name: 3T Extrema Italia Discus 45|40 GRX Di2 1x12
Brand: 3T

2026 RoadGravel Manufacturer page

Last known price: $9,999

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 12 40t / 10–51t
Gear range: 510%
Frame: Carbon
Brakes: Hydraulic disc

Not published by the manufacturer

Sizes and geometry

Components

13 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

Jazz Carbon: 3T’s in-house filament-winding using a combination of high-strength/high-stiffness fibers, combined with RTM resin injection. Made in Italy Not identified

Suspension

1 part

Fork
- 3T

Drivetrain

4 parts

Cassette
- Shimano Deore XT CS-M8200-12 12 speeds 10–51t
CS-M8200-12
Crankset
- Shimano GRX FC-RX820-1 12 speeds 40t
FC-RX820
Rear derailleur
- Shimano GRX RD-RX827 12 speeds
RD-RX827
Shifters
- Shimano GRX ST-RX825
ST-RX825BL-RX820

Brakes

1 part

Brakes
- Shimano GRX BR-RX820
BR-RX820RT-CL800

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Handlebar
- 3T
Headset
- 3T
Saddle
- Fizik Argo
Seatpost
- 3T
Stem
- 3T

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: 22.8 in
Highest gear: 116.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Tire width: 55c
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

22.8 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,452 bicycles with this information
Coverage: 73.2% of the class

Highest gear

116.0 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,452 bicycles with this information
Coverage: 73.2% of the class

Shifting

Electronic

706 of 1,977 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2026
Sample: 1,977 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.7 km/h
Highest gear: 44.4 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: 22.8–116.0 gear inches
Class reference (p10–p90): 22.8–127.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Gravel Model year: 2026
Lowest gear: 1452 bicycles with this information, 73.2% of the class
Highest gear: 1452 bicycles with this information, 73.2% 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 2026 builds
Specification	This bicycle 3T Extrema Italia Discus 45\|40 GRX Di2 1x12	3T Extrema Italia Force E1/ Discus 45\|40 XX SL Eagle Transmission AXS 1x12	3T Extrema Italia Torno Discus 45\|40 Red XPLR AXS 1x13	3T Extrema Italia PM Discus 45\|40 Red XPLR AXS 1x13	3T Extrema Italia Discus 45\|40 Rival E1 GX Eagle Transmission AXS 1x12
Drivetrain
Smallest chainring	40	40	38	38	40
Largest chainring	40	40	38	38	40
Rear sprockets	12	12	13	13	12
Largest sprocket	51	52	46	46	52
Lowest gear	22.8 in	22.3 in	24.0 in	24.0 in	22.3 in
Highest gear	116.0 in	116.0 in	110.2 in	110.2 in	116.0 in
Other specifications
Power meter	Not informed	Not informed	Not informed	SRAM Red E1 XPLR WIDE Power Meter 38T (S&M: 170mm - L&XL: 172,5mm)Additional specification: Model display: Red AXSAdditional specification: Model id: red-axs	Not informed