Giant Roam 4 Disc

Name: Giant Roam 4 Disc
Brand: Giant

2021 UrbanHybrid Manufacturer page

Last known price: $650

Prices shown first for United States
Fork travel: 63 mm
Wheels: 700c
Drivetrain: 2 × 7 30–46t / 12–32t
Gear range: 409%
Frame: Aluminum
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

SM 160–171
MD 169–181
LG 179–191
XL 189–200

Components

14 of 21 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

ALUXX-Grade Aluminum, disc Not identified

Suspension

2 parts

Fork
- SR Suntour NEX
Rear shock

None

Drivetrain

7 parts

Bottom bracket

Cartridge Not identified
Cassette
- Shimano CS-HG200
CS-HG200
Chain
- KMC Z7 7 speeds
Crankset

forged alloy, 30/46 Not identified
Front derailleur
- Shimano Tourney
Rear derailleur
- Shimano Altus
Shifters
- Shimano Altus

Brakes

2 parts

Brake levers
- Tektro
TKB-172
Brakes
- Tektro
TKB-172

Wheels and tires

5 parts

Front hub

alloy disc, 32h, QR Not identified
Rear hub

alloy disc, 32h, QR Not identified
Rims
- Giant
Spokes

Stainless Not identified
Tires
- Giant

Cockpit and contact points

5 parts

Handlebar
- Giant
Pedals

platform Not identified
Saddle
- Giant
Seatpost
- Giant
Stem
- Giant

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 410mm

Stack 620mm

Wheelbase 1098mm

Head angle 70.5°

Seat angle 73.0°

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
Frame
Reachmm	404	410	416	427
Stackmm	606	620	634	648
Top tube lengthmm	590	600	610	625
Seat tube lengthmm	420	460	500	550
Head tube lengthmm	115	130	145	160
Head tube angle	70.5°	70.5°	70.5°	70.5°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	450	450	450	450
Wheelbasemm	1088	1098	1109	1125
Front centermm	645	655	666	682
Bottom bracket dropmm	62	62	62	62
Standover heightmm	725	756	788	827
Fork rakemm	42	42	42	42
Trailmm	85	85	85	85
Stack/reach ratio	1.50	1.51	1.52	1.52
Suspension and parts
Crank lengthmm	170	170	175	175
Handlebar widthmm	640	680	680	680
Stem lengthmm	70	80	90	100

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 63 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 30
Largest chainring: 46
Rear sprockets: 7
Smallest sprocket: 12
Largest sprocket: 32
Lowest gear: 27.2 in
Highest gear: 111.2 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 42c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 measures

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

Lowest gear

27.2 gear inches

This value is within the central range for this class.

Cohort: Urban / Hybrid Model year: 2021
Sample: 522 bicycles with this information
Coverage: 74.0% of the class

Highest gear

111.2 gear inches

This value is within the central range for this class.

Cohort: Urban / Hybrid Model year: 2021
Sample: 522 bicycles with this information
Coverage: 74.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 10.4 km/h
Highest gear: 42.6 km/h

Total gear range 409%

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: 27.2–111.2 gear inches
Class reference (p10–p90): 21.6–126.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Hybrid Model year: 2021
Lowest gear: 522 bicycles with this information, 74.0% of the class
Highest gear: 522 bicycles with this information, 74.0% 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 2021 builds
Specification	This bicycle Giant Roam 4 Disc	Giant Roam 0 Disc	Giant Roam 1 Disc	Giant Roam 2 Disc	Giant Roam 3 Disc
Frame
Fork material	Not informed	Aluminum	Not informed	Not informed	Not informed
Bicycle weight	Not informed	12.2 kg	13.1 kg	12.5 kg	13 kg
Drivetrain
Front chainrings	2	2	2	1	2
Smallest chainring	30	30	30	40	30
Largest chainring	46	46	46	40	46
Rear sprockets	7	11	10	9	8
Smallest sprocket	12	11	11	11	11
Largest sprocket	32	42	42	36	34
Lowest gear	27.2 in	20.7 in	20.7 in	32.2 in	25.6 in
Highest gear	111.2 in	121.3 in	121.3 in	105.5 in	121.3 in
Brakes
Brake type	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc
Other specifications
Fork spring	Coil	Air	Air	Coil	Coil
Bottom bracket standard	Not informed	BSA	BSA	BSA	Not informed

Changes since 2020
Specification	2020 Giant Roam 4 Disc	This bicycle Giant Roam 4 Disc
Frame
Bicycle weight	14.2 kg	Not informed
Drivetrain
Front chainrings	3	2
Smallest chainring	28	30
Largest chainring	44	46
Lowest gear	25.4 in	27.2 in
Highest gear	106.3 in	111.2 in
Brakes
Brake type	Hydraulic disc	Mechanical disc