Calibre E-Lost Lad

2026 RoadGravel Electric bicycle

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 8 34–50t / 11–34t
Gear range: 455%
Frame: Aluminum
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

MD 165–177
LG 175–188
XL 185–198

Components

12 of 24 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

Alu 6061, 27.5”, 138mm spacing for Promovec hub motor, Post-mount disc, 44mm headtube Not identified

Electric system

3 parts

Battery

Promovec 50762-BL-C DT1 - 36V - 7.8AH Not identified
Display

Promovec 50951 Not identified
Motor

Promovec 250W hub motor Not identified

Suspension

1 part

Fork

Alu 6061, 100mm QR, IS disc mount, rack & mudguard mounts, 28.6mm steerer, 50mm offset, 410 A2C Not identified

Drivetrain

7 parts

Bottom bracket

External 73mm BB Not identified
Cassette
- Shimano
Chain
- KMC
Crankset
- Calibre
Front derailleur
- Shimano Claris
Rear derailleur
- Shimano Claris RD-R2000-GS 8 speeds
RD-R2000-GSRD-R2000GS
Shifters
- Shimano Claris ST-R2000
ST-R2000

Brakes

1 part

Brakes
- Clarks
CMD-23

Wheels and tires

4 parts

Front hub

Shun Feng 32H QR SFA217F Not identified
Rear hub

Promovec 250W hub motor Not identified
Rims

29”, 25mm wide, 32h front, 36h rear, alu double wall Not identified
Tires
- WTB

Cockpit and contact points

7 parts

Grips

Black cork bar tape Not identified
Handlebar
- Calibre
Headset

Semi-integrated, ZS44 Not identified
Pedals

Flat pedals Not identified
Saddle
- Calibre
Seatpost
- Calibre
Stem
- Calibre

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size LG

Table

Geometry diagram unavailable

The drawing needs wheelbase, reach, stack, head tube length and seat tube length, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Head tube angle	70°	70°	70°
Seat tube angle	74°	74°	74°
Chainstay lengthmm	440	440	440
Bottom bracket dropmm	70	70	70
Bottom bracket heightmm	279	279	279

Not published by the manufacturer: Reach, Stack, Top tube length, Seat tube length, Head tube length, Wheelbase, Front center, Standover height, Fork rake, Trail, Stack/reach ratio, 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: Aluminum
Fork material: Aluminum

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Battery: Promovec 50762-BL-C DT1 - 36V - 7.8AH
Tire width: 47c
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

29.0 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Highest gear

131.8 gear inches

This value is above the central range for this class.

Cohort: Road / Gravel Model year: 2026
Sample: 1,455 bicycles with this information
Coverage: 73.2% of the class

Shifting

Mechanical

706 of 1,980 bicycles with this information use electronic shifting.

Cohort: Road / Gravel Model year: 2026
Sample: 1,980 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 50.5 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: 29.0–131.8 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: 1455 bicycles with this information, 73.2% of the class
Highest gear: 1455 bicycles with this information, 73.2% of the class