6.1–32.3 mph at 90 rpm, estimated from the published rear tire size 700×40c · 40-622 ETRTO.
Velopedia Bicycle Archive
2015 Giant Roam 3
Original specifications: Shimano Tiagra drivetrain · 700c wheels · geometry for 4 published sizes.
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At a glance
- Model year
- 2015
- Category
- Hybrid
- Original MSRP
- $550.00
- Sizes
- S, M, L, XL
- Colors
- Black, Matte Red/Gloss Red
- Geometry
- 4 manufacturer sizes
- In this record
- 25 specifications · 3 archived images · original MSRP · geometry
- Archive ID
- 1107660
Model history 1 other year
Original buildAluminum · Shimano Tiagra · 700c
Frameset
| Frame Construction | ALUXX-grade aluminum |
|---|---|
| Frame Material | Aluminum |
| Fork | SR Suntour NEX HLO w/ preload adjuster & lockout, 63mm travel |
| Fork Material | Suspension |
Drivetrain
| Component Group | Shimano Tiagra |
|---|---|
| Shifters | Shimano EF51 |
| Front Derailleur | Shimano M191 |
| Rear Derailleur | Shimano Acera |
| Crankset | SR Suntour XCT, 28/38/48 |
| Bottom Bracket | SR Suntour, Sealed |
| Cassette | Shimano HG31 11x34, 8-speed |
| Rear Cogs | Shimano HG31 11x34, 8-speed |
| Chain | KMC Z8 |
| Pedals | Nylon w/ Anti-slip platform |
Brakes
| Brakes | Alloy, linear pull |
|---|
Cockpit & Contact Points
| Handlebar | Giant Sport, Low rise, 25.4mm |
|---|---|
| Stem | Giant Sport |
| Saddle | Giant Connect, Upright |
| Seatpost | Giant Sport, 30.9 |
Wheels & Tires
| Hubs | Formula, 32h |
|---|---|
| Rims | Giant Alloy, Double wall |
| Spokes | Stainless Steel, 14g |
| Front Tire | Giant S-RX4, 700x40 |
| Rear Tire | Giant S-RX4, 700x40 |
| Wheel Size | 700c |
Geometry
Frame measurements by size.
Reference frame view
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 7 measurements
| Measurement | S/17 | M/19 | L/21 | XL/23 |
|---|---|---|---|---|
| Top tube | 571.5 mm | 579.12 mm | 596.9 mm | 609.6 mm |
| Head tube | 109.22 mm | 114.3 mm | 119.38 mm | 124.46 mm |
| Head-tube angle | 71° | 71° | 71° | 71° |
| Seat-tube angle | 73° | 73° | 73° | 73° |
| Chainstay / rear center | 447.04 mm | 447.04 mm | 447.04 mm | 447.04 mm |
| Wheelbase | 1064.26 mm | 1082.04 mm | 1097.28 mm | 1117.6 mm |
| Standover height | 762 mm | 784.86 mm | 812.8 mm | 840.74 mm |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
Find replacement parts

SRAM PC-850 Chain One Color, 8 Speed
8 Speed
Replacement option · verify fit
More parts (2)
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Bike-specific inspection checklist 20 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2015 Giant Roam 3 · Hybrid · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALUXX-grade aluminum · Fork: SR Suntour NEX HLO w/ preload adjuster & lockout, 63mm travel · Suspension
Suspension
Evaluate the suspension →Archived: Fork: SR Suntour NEX HLO w/ preload adjuster & lockout, 63mm travel
Drivetrain
Check drivetrain wear →Archived: Group: Shimano Tiagra · Shifters: Shimano EF51 · Front derailleur: Shimano M191 · Rear derailleur: Shimano Acera · Crankset: SR Suntour XCT, 28/38/48 · Bottom bracket: SR Suntour, Sealed · Cassette: Shimano HG31 11x34, 8-speed · Rear cogs: Shimano HG31 11x34, 8-speed · Chain: KMC Z8
Brakes
Inspect the brakes →Archived: Brakes: Alloy, linear pull
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c · Rims: Giant Alloy, Double wall · Hubs: Formula, 32h · Front tire: Giant S-RX4, 700x40 · Rear tire: Giant S-RX4, 700x40
Controls and contact points
Archived: Handlebar: Giant Sport, Low rise, 25.4mm · Stem: Giant Sport · Seatpost: Giant Sport, 30.9 · Saddle: Giant Connect, Upright · Pedals: Nylon w/ Anti-slip platform
Before and during the test ride
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Gallery3 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




