Mason SLR Shimano

Name: Mason SLR Shimano
Brand: Mason

2026 RoadGravel Manufacturer page

Price: Not published

Prices shown first for United States
United Kingdom: £3,600 Last known price
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 11 31–48t / 11–34t
Gear range: 479%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

48cm 152–160
50cm 157–168
52cm 163–172
54cm 170–180
56cm 175–185
58cm 180–188
60cm 185–193
62cm 191–198

Components

9 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

SLR custom formed, TIG welded, Dedacciai Zero/Uno. Not identified

Suspension

1 part

Fork

Mason Rangefinder AR custom tuned, full carbon, thru-axle fork with rack-mounts. Not identified

Drivetrain

5 parts

Cassette

11-34. 105 / Ultegra / Dura-Ace / GRX 810 / GRX 820. Alternative ratios available on request. Not identified
Chain
- Shimano
Crankset

48/31& 50/34. Select From: 810 GRX 11spd / 820 GRX 12spd / 105 12spd / Ultegra 11spd / Ultegra Di2 12spd / Dura-Ace Di2 12spd. Not identified
Rear derailleur
- Shimano
GRX-810GRX-820
Shifters
- Shimano
GRX-810GRX-820

Brakes

1 part

Brakes

Hydraulic Disc Not identified

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Handlebar
- Deda
Headset
- Deda
Saddle
- Fizik
Seatpost

MASON Penta carbon, microadjust. Not identified
Stem
- Deda

Sizes and geometry

8 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size 54cm

Table

Reach 374mm

Stack 588mm

Wheelbase 1034mm

Head angle 70.5°

Seat angle 73.5°

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 8 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	360	365	373.1	374.3	378	385	400.4	405
Stackmm	555	564.4	575.8	588	602.2	613.6	622.2	641.1
Top tube lengthmm	516.5	524.1	535.1	550.3	558.2	579.4	597.2	607.8
Seat tube lengthmm	480	500	520	540	560	580	600	620
Head tube lengthmm	130	140	150	165	180	190	200	220
Head tube angle	70°	70°	70.5°	70.5°	70.5°	71°	71.5°	71.5°
Seat tube angle	74.5°	74.5°	74.5°	73.5°	73.5°	72.5°	72.5°	72.5°
Chainstay lengthmm	430	430	430	430	430	430	430	430
Wheelbasemm	1011.3	1019.7	1026.9	1033.5	1042.2	1047.8	1062.1	1073.1
Front centermm	592.7	601	608.1	614	622.7	628.3	641.7	652.6
Bottom bracket dropmm	75	75	75	73	73	73	70	70
Bottom bracket heightmm	274	274	274	276	276	276	279	279
Standover heightmm	738.5	758.8	778.2	795.3	811.8	827.1	845.3	866.8
Fork rakemm	50	50	50	50	50	50	50	50
Trailmm	74	74	71	71	71	67	64	130
Stack/reach ratio	1.54	1.55	1.54	1.57	1.59	1.59	1.55	1.58
Suspension and parts
Crank lengthmm	165	165	170	172.5	172.5	175	175	175
Stem lengthmm	80	80	90	90	100	100	110	120

Not published by the manufacturer: Front travel, Rear travel, Handlebar width, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Carbon
Frame weight: 2.2 kg

4.9 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 31
Largest chainring: 48
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 26.4 in
Highest gear: 126.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Tire clearance: Maximum tire width: 45c; Additional specification: Wheel kind: 700
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

26.4 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

Highest gear

126.6 gear inches

This value is above 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

Electronic

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: 10.1 km/h
Highest gear: 48.5 km/h

Total gear range 479%

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: 26.4–126.6 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 Mason SLR Shimano	Mason SLR Campagnolo	Mason SLR Sram
Drivetrain
Front chainrings	2	1	2
Smallest chainring	31	40	35
Largest chainring	48	40	48
Rear sprockets	11	13	12
Smallest sprocket	11	9	10
Largest sprocket	34	36	36
Lowest gear	26.4 in	32.2 in	28.2 in
Highest gear	126.6 in	128.9 in	139.2 in
Cockpit
Shifting	Electronic	Mechanical	Electronic
Other specifications
Tire clearance	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Maximum tire width: 45c; Additional specification: Wheel kind: 700	Not informed
Bottom bracket standard	Not informed	T47	Not informed