Rear tire: 700C×32.
Velopedia Bicycle Archive
2021 Giant FastRoad SL 3
Original specifications: geometry for 5 published sizes.
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At a glance
- Model year
- 2021
- Category
- Road
- Original MSRP
- $960.00
- Sizes
- S, M, ML, L, XL
- Colors
- Metallic Black/Chrome
- Geometry
- 5 manufacturer sizes
- In this record
- 22 specifications · 8 archived images · original MSRP · geometry
- Archive ID
- 900003053
Original buildAluminum
Frameset
| Frame Construction | ALUXX SL-Grade Aluminum |
|---|---|
| Frame Material | Aluminum |
| Fork | Advanced-Grade Composite, alloy OverDrive steerer |
| Fork Material | Carbon Fiber |
Drivetrain
| Shifters | Shimano Claris |
|---|---|
| Front Derailleur | Shimano Claris |
| Rear Derailleur | Shimano Claris |
| Crankset | ProWheel Ounce 521C, 34/50 |
| Bottom Bracket | cartridge |
| Cassette | Shimano CS-HG41, 11x34 |
| Chain | KMC Z8.3 |
| Pedals | platform pedal |
Brakes
| Brakes | Tektro HD-R280 |
|---|
Cockpit & Contact Points
| Handlebar | Giant Sport, flat |
|---|---|
| Stem | Giant Sport |
| Saddle | Giant Approach |
| Seatpost | Giant D-Fuse, alloy |
Wheels & Tires
| Hubs | Giant GX wheelset |
|---|---|
| Rims | Giant GX wheelset |
| Spokes | Giant GX wheelset |
| Front Tire | Giant S-R3 AC, puncture protect, 700x32c |
| Rear Tire | Giant S-R3 AC, puncture protect, 700x32c |
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements5 sizes · 17 measurements
| Measurement | S | M | ML | L | XL |
|---|---|---|---|---|---|
| Seat tube | 445 mm | 460 mm | 490 mm | 520 mm | 550 mm |
| Top tube | 545 mm | 560 mm | 575 mm | 595 mm | 615 mm |
| Head tube | 130 mm | 155 mm | 180 mm | 200 mm | 225 mm |
| Head-tube angle | 71.5° | 72° | 72° | 72.5° | 72.5° |
| Seat-tube angle | 73.5° | 73° | 73° | 72.5° | 72.5° |
| Chainstay / rear center | 425 mm | 425 mm | 425 mm | 425 mm | 425 mm |
| Wheelbase | 1014 mm | 1020 mm | 1035 mm | 1045 mm | 1065 mm |
| Bottom-bracket drop | 70 mm | 70 mm | 70 mm | 70 mm | 70 mm |
| Reach | 386 mm | 388 mm | 395 mm | 403 mm | 416 mm |
| Stack | 537 mm | 563 mm | 586 mm | 607 mm | 631 mm |
| Standover height | 697 mm | 719 mm | 741 mm | 767 mm | 795 mm |
| Fork offset / rake | 50 mm | 50 mm | 50 mm | 50 mm | 50 mm |
| Trail | 64.7 mm | 61.5 mm | 61.5 mm | 58.2 mm | 58.2 mm |
| Crank length | 170 mm | 170 mm | 170 mm | 175 mm | 175 mm |
| Stem length | 90 mm | 100 mm | 100 mm | 110 mm | 110 mm |
| Handlebar width | 580 mm | 620 mm | 620 mm | 620 mm | 620 mm |
| Wheel size | 700C | 700C | 700C | 700C | 700C |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
How it works
Ratio = chainring teeth ÷ rear sprocket teeth. A 400% range means the highest ratio is four times the lowest.
Speeds are estimates from tire size and pedal cadence. Actual speeds vary.
Bike-specific inspection checklist 19 checks based on 5 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: 2021 Giant FastRoad SL 3 · Road · Published sizes: S, M, ML, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALUXX SL-Grade Aluminum · Fork: Advanced-Grade Composite, alloy OverDrive steerer · Carbon Fiber
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Claris · Front derailleur: Shimano Claris · Rear derailleur: Shimano Claris · Crankset: ProWheel Ounce 521C, 34/50 · Bottom bracket: cartridge · Cassette: Shimano CS-HG41, 11x34 · Chain: KMC Z8.3
Brakes
Inspect the brakes →Archived: Brakes: Tektro HD-R280
Wheels and tires
Check wheels and tires →Archived: Rims: Giant GX wheelset · Hubs: Giant GX wheelset · Front tire: Giant S-R3 AC, puncture protect, 700x32c · Rear tire: Giant S-R3 AC, puncture protect, 700x32c
Controls and contact points
Archived: Handlebar: Giant Sport, flat · Stem: Giant Sport · Seatpost: Giant D-Fuse, alloy · Saddle: Giant Approach · Pedals: platform pedal
Before and during the test ride
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Gallery8 images
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





