Principia G1

Name: Principia G1
Brand: Principia

2024 RoadGravel Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €3,199 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 1 × 11 40t / 11–42t
Gear range: 382%
Weight: 9.3 kg 20.5 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

48cm
50cm
52cm
54cm
56cm

The manufacturer did not publish rider heights for these sizes.

Components

8 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

Principia CHF-18 Carbon Not identified

CHF-18

Suspension

1 part

Fork

Principia CHK80-ET-M12 Carbon Not identified

ET-M12

Drivetrain

5 parts

Bottom bracket

BB86 Pressfit Evo Max 86,5x41mm Not identified
Cassette
- Shimano Deore XT CS-M8000 11 speeds 11–42t
CS-M8000
Chain
- Shimano CN-HG601-11
CN-HG601-11
Crankset
- Shimano GRX FC-RX600 40t
FC-RX600
Rear derailleur
- Shimano GRX RD-RX812 11 speeds
RD-RX812

Brakes

1 part

Brakes
- Shimano GRX BR-RX400
BR-RX400

Wheels and tires

2 parts

Rims

28in (700) Not identified
Tires
- Panaracer

Cockpit and contact points

4 parts

Grips

Principia bar tape Not identified
Pedals

Not included Not identified
Saddle
- Ritchey Comp Streem
Seatpost
- Ritchey Comp

Sizes and geometry

5 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 52cm

Table

Reach 379mm

Stack 598mm

Wheelbase 1034mm

Head angle 71.3°

Seat angle 73.2°

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 Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	368.6	369.6	379.4	387.6	396.5
Stackmm	564.1	581.5	597.7	609.4	628.3
Top tube lengthmm	525	545	560	575	590
Seat tube lengthmm	480	500	520	540	560
Head tube lengthmm	115	135	150	165	185
Head tube angle	70.5°	70.75°	71.25°	71.25°	71.25°
Seat tube angle	74.5°	73.2°	73.2°	72.9°	72.9°
Chainstay lengthmm	435	435	435	435	435
Wheelbasemm	1017.9	1023.9	1034.2	1047.7	1063
Front centermm	597	602	613	625	640
Bottom bracket dropmm	85	82.5	82.5	80	80
Bottom bracket heightmm	275	277.5	277.5	280	280
Standover heightmm	744.4	761.4	778.7	796.5	814.6
Fork rakemm	50	50	50	50	50
Trailmm	74.4	72.8	69.4	69.4	69.4
Stack/reach ratio	1.53	1.57	1.58	1.57	1.59

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
Bicycle weight: 9.3 kg

20.5 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 40
Largest chainring: 40
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 27.6 in
Highest gear: 105.5 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB86/BB92
Tire width: 38c
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

27.6 gear inches

This value is within the central range for this class.

Cohort: Road / Gravel Model year: 2024
Sample: 1,719 bicycles with this information
Coverage: 76.6% of the class

Highest gear

105.5 gear inches

This value is below the central range for this class.

Cohort: Road / Gravel Model year: 2024
Sample: 1,719 bicycles with this information
Coverage: 76.6% of the class

Shifting

Mechanical

772 of 2,241 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2024
Sample: 2,241 bicycles with this information
Coverage: 99.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.6 km/h
Highest gear: 40.4 km/h

Total gear range 382%

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: 27.6–105.5 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: 1719 bicycles with this information, 76.6% of the class
Highest gear: 1719 bicycles with this information, 76.6% of the class