Obed MMR Shimano GRX 820 1x12 spd

2026 RoadGravel Manufacturer page

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

Rider height by size (cm)

Size guide

XS 151–164
SM 159–170
MD 165–177
LG 171–184

Components

9 of 16 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.

Suspension

1 part

Fork

Select in Builder Not identified

Drivetrain

7 parts

Bottom bracket

T47 Outboard Not identified
Cassette
- Shimano Deore XT CS-M8100-12 12 speeds
CS-M8100-12
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Shimano GRX FC-RX820 12 speeds 40t
FC-RX820
Front derailleur

None
Rear derailleur
- Shimano GRX RD-RX822 12 speeds
RD-RX822
Shifters
- Shimano GRX ST-RX820
ST-RX820

Brakes

2 parts

Wheels and tires

2 parts

Rims

Select in Builder Not identified
Tires

Select in Builder Not identified

Cockpit and contact points

5 parts

Handlebar

Select in Builder Not identified
Headset
- FSA NO.55R 1.5" / 558 ACR
Saddle

Select in Builder Not identified
Seatpost

Select in Builder Not identified
Stem
- FSA

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Reach 380mm

Stack 560mm

Wheelbase 1048mm

Head angle 69.5°

Seat angle 74.0°

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 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	370	380	390	400
Stackmm	540	560	580	600
Top tube lengthmm	520	541	562	578
Seat tube lengthmm	430	460	490	525
Head tube lengthmm	95	114	135	157
Head tube angle	69°	69.5°	70°	70°
Seat tube angle	74.5°	74°	73.5°	73.5°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1035	1048	1061	1078
Front centermm	606	619	632	649
Bottom bracket dropmm	76	76	74	74
Bottom bracket heightmm	273	273	275	275
Standover heightmm	715	749	805	834
Fork rakemm	50	50	50	50
Trailmm	80	77	74	74
Stack/reach ratio	1.46	1.47	1.49	1.50

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: 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

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: T47
Tire clearance: Maximum tire width: 2.25″
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

Mechanical

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 Obed MMR Shimano GRX 820 1x12 spd	Obed MMR Carbon Shimano GRX 810 2x	Obed MMR Carbon Shimano GRX 820 1x12 spd	Obed MMR Carbon Shimano GRX 827 Di2 1x12 spd	Obed MMR Carbon SRAM Force XPLR E1	Obed MMR Carbon SRAM Red XPLR E1
Drivetrain
Front chainrings	1	2	1	1	1	1
Smallest chainring	40	30	40	40	42	42
Largest chainring	40	46	40	40	42	42
Rear sprockets	12	11	12	12	13	13
Smallest sprocket	10	11	10	10	10	10
Largest sprocket	51	34	51	51	46	46
Lowest gear	22.8 in	25.6 in	22.8 in	22.8 in	26.5 in	26.5 in
Highest gear	116.0 in	121.3 in	116.0 in	116.0 in	121.8 in	121.8 in
Cockpit
Shifting	Mechanical	Mechanical	Mechanical	Electronic	Electronic	Electronic
Other specifications
Power meter	Not informed	Not informed	Not informed	Not informed	SRAM Force XPLR E1 AXS 42T Power MeterAdditional specification: Model display: Force AXSAdditional specification: Model id: force-axs	SRAM RED XPLR E1 AXS 42T Power MeterAdditional specification: Model display: Red AXSAdditional specification: Model id: red-axs