Principia Evoke C20

Name: Principia Evoke C20
Brand: Principia

2025 MountainCross-country Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €2,699 Last known price
Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 12 34t / 11–50t
Gear range: 455%
Weight: 11.5 kg 25.4 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

9 of 11 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 Evoke Carbon 29" Not identified

Suspension

1 part

Fork
- Manitou

Drivetrain

4 parts

Brakes

1 part

Brakes
- Tektro HD-M275 / HD-M276
HD-M275HD-M276

Wheels and tires

2 parts

Rims

29in Not identified
Tires
- Schwalbe Nobby Nic

Cockpit and contact points

2 parts

Handlebar
- Kalloy
HB-FB11L
Seatpost
- Kalloy
SP-602

Sizes and geometry

4 sizes Open in the geometry plotter

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

Size 15"

Table

Reach 398mm

Stack 604mm

Wheelbase 1092mm

Head angle 69.5°

Seat angle 73.7°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	444	398.3	415.4	431.9
Stackmm	634.6	604.1	613.5	625.2
Top tube lengthmm	—	575	595	615
Seat tube lengthmm	530	390	430	480
Head tube lengthmm	130	100	110	120
Head tube angle	70°	69.5°	69.5°	70°
Seat tube angle	73.7°	73.7°	73.7°	73.7°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1143.3	1092	1112.7	1127.7
Front centermm	710	659	679	694
Bottom bracket dropmm	60	60	60	60
Bottom bracket heightmm	316	316	316	316
Standover heightmm	828.2	714.9	748.1	789.2
Fork rakemm	51	51	51	51
Trailmm	79.5	82.6	82.6	79.5
Stack/reach ratio	1.43	1.52	1.48	1.45

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
Bicycle weight: 11.5 kg

25.4 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 19.7 in
Highest gear: 89.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

2 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,508 bicycles with this information
Coverage: 87.8% of the class

Shifting

Mechanical

222 of 1,648 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,648 bicycles with this information
Coverage: 95.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.6 km/h
Highest gear: 34.3 km/h

Total gear range 455%

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: 19.7–89.6 gear inches

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
Specification	This bicycle Principia Evoke C20	Principia Evoke A2.0	Principia Evoke A2.4	Principia Evoke A2.6	Principia Evoke A3.9	Principia Evoke A5.9
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Bicycle weight	11.5 kg	11.5 kg	13.1 kg	13.5 kg	15 kg	15.5 kg
Suspension
Front travel	100 mm	Not informed	Not informed	Not informed	Not informed	Not informed
Drivetrain
Smallest chainring	34	36	40	40	32	32
Largest chainring	34	36	40	40	32	32
Rear sprockets	12	Not informed	7	7	9	10
Smallest sprocket	11	14	12	12	11	11
Largest sprocket	50	28	32	32	36	42
Lowest gear	19.7 in	25.7 in	30.0 in	32.5 in	25.8 in	22.1 in
Highest gear	89.6 in	51.4 in	80.0 in	86.7 in	84.4 in	84.4 in
Cockpit
Seatpost	Rigid seatpost	Not informed	Not informed	Not informed	Not informed	Not informed
Other specifications
Fork spring	Air	Coil	Coil	Coil	Not informed	Not informed
Tire width	2.4″	Not informed	2″	2.1″	2.1″	2.1″
Wheel size	29″	20″	24″	26″	29″	29″