Ventum NS1 | Legacy Dura-Ace Di2

Name: Ventum NS1 | Legacy Dura-Ace Di2
Brand: Ventum

2025 RoadAero Manufacturer page

Last known price: $11,299

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–30t
Gear range: 394%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 155–168
SM 163–174
MD 170–181
MD/LG 175–187
LG 181–193
XL 188–200

Components

14 of 15 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

Ventum NS1 & Road frame | Full carbon fiber construction | Internal cable routing | T47 threaded BB | Flat mount disc brake | UDH Not identified

Suspension

1 part

Fork
- Ventum

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- Shimano Dura-Ace CS-R9200 12 speeds 11–30t
CS-R9200
Chain
- Shimano Dura-Ace
CN-M9100
Crankset
- Shimano Dura-Ace FC-R9200 52/36t
FC-R9200
Front derailleur
- Shimano Dura-Ace FD-R9250 2 speeds
FD-R9250
Rear derailleur
- Shimano Dura-Ace RD-R9250 12 speeds
RD-R9250
Shifters
- Shimano Dura-Ace

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

2 parts

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 388mm

Stack 536mm

Wheelbase 982mm

Head angle 73.0°

Seat angle 73.0°

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 6 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	374	378	388	395	405	413
Stackmm	493	510	536	552	585	604
Top tube lengthmm	521	530	552	564	584	598
Seat tube lengthmm	453	467	493	514	546	568
Head tube lengthmm	96	110	134	151	185	205
Head tube angle	71°	72°	73°	73°	73°	73°
Seat tube angle	73.5°	73.5°	73°	73°	73°	73°
Chainstay lengthmm	410	410	410	410	410	410
Wheelbasemm	972	973	982	994	1014	1028
Front centermm	572	673	582	594	614	628
Bottom bracket dropmm	69	69	69	69	69	69
Bottom bracket heightmm	267	267	267	267	267	267
Standover heightmm	737	753	777	796	827	847
Fork rakemm	45	45	45	45	45	45
Trailmm	70.9	64.5	58.1	58.1	58.1	58.1
Stack/reach ratio	1.32	1.35	1.38	1.40	1.44	1.46

Not published by the manufacturer: 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: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 30
Lowest gear: 34.8 in
Highest gear: 137.1 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

Bottom bracket standard: T47
Tire clearance: Maximum tire width: 30c; Additional specification: Wheel kind: 700
Tire width: 28c
Wheel material: Carbon
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

34.8 gear inches

This value is within the central range for this class.

Cohort: Road / Aero Model year: 2025
Sample: 333 bicycles with this information
Coverage: 78.7% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Aero Model year: 2025
Sample: 333 bicycles with this information
Coverage: 78.7% of the class

Shifting

Electronic

330 of 418 bicycles with this information use electronic shifting.

Cohort: Road / Aero Model year: 2025
Sample: 418 bicycles with this information
Coverage: 98.8% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 13.3 km/h
Highest gear: 52.5 km/h

Total gear range 394%

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: 34.8–137.1 gear inches
Class reference (p10–p90): 28.2–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Aero Model year: 2025
Lowest gear: 333 bicycles with this information, 78.7% of the class
Highest gear: 333 bicycles with this information, 78.7% 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Ventum NS1 \| Legacy Dura-Ace Di2	Ventum NS1 105 Di2	Ventum NS1 Dura-Ace Di2	Ventum NS1 \| Zipp 303 Firecrest Dura-Ace Di2	Ventum NS1 Force AXS	Ventum NS1 \| Legacy Force AXS
Frame
Weight limit	Not informed	Not informed	Not informed	Not informed	Not informed	113.4 kg
Drivetrain
Smallest chainring	36	36	36	36	35	35
Largest chainring	52	52	52	52	48	48
Smallest sprocket	11	11	11	11	10	10
Largest sprocket	30	34	30	30	36	36
Lowest gear	34.8 in	30.7 in	34.8 in	34.8 in	28.2 in	28.2 in
Highest gear	137.1 in	137.1 in	137.1 in	137.1 in	139.2 in	139.2 in
Cockpit
Derailleur hanger	UDH	UDH	UDH	UDH	UDH	Not informed
Other specifications
Tire width	28c	28c	30c	28c	30c	28c
Power meter	Not informed	Not informed	Not informed	Not informed	XS: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 165mm crank length, S: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 165mm crank length, M: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 170mm crank length, M/L: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 170mm crank length, L: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 172.5mm crank length, XL: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 172.5mm crank lengthAdditional specification: Model display: Force AXSAdditional specification: Model id: force-axs	XS: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 170mm crank length, S: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 170mm crank length, M: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 170mm crank length, M/L: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 170mm crank length, L: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 172.5mm crank length, XL: SRAM Force AXS Power Meter Crankset \| 48/35T chainrings \| 172.5mm crank lengthAdditional specification: Model display: Force AXSAdditional specification: Model id: force-axs