7.5–32.2 mph at 90 rpm, estimated from the published rear tire size 700×25c · 25-622 ETRTO.
Velopedia Bicycle Archive
2015 Giant Defy 3
Original specifications: geometry for 6 published sizes.
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At a glance
- Model year
- 2015
- Category
- Road
- Original MSRP
- $970.00
- Sizes
- XS, S, M, M/L, L, XL
- Colors
- Black/Red/Silver, Blue/White/Green
- Geometry
- 6 manufacturer sizes
- In this record
- 22 specifications · archived image · original MSRP · geometry
- Archive ID
- 900002096
Model history 4 other years
Original buildAluminum
Frameset
| Frame Construction | ALUXX-grade aluminum |
|---|---|
| Frame Material | Aluminum |
| Fork | Composite, Alloy OverDrive steerer |
| Fork Material | Carbon Fiber |
Drivetrain
| Shifters | Shimano Sora |
|---|---|
| Front Derailleur | Shimano Sora |
| Rear Derailleur | Shimano Sora |
| Crankset | Shimano Sora, 34/50 |
| Bottom Bracket | Sealed |
| Cassette | SRAM PG950 11x32, 9-speed |
| Chain | KMC X9 |
| Pedals | Caged w/ toe clip and strap |
Brakes
| Brakes | Tektro R312 |
|---|
Cockpit & Contact Points
| Handlebar | Giant Connect, 31.8mm |
|---|---|
| Stem | Giant Sport |
| Saddle | Giant Performance Road |
| Seatpost | Giant Sport, 30.9mm |
Wheels & Tires
| Hubs | Giant Tracker Sport Road, 26h |
|---|---|
| Rims | Giant S-R2 |
| Spokes | Stainless Steel, 14g |
| Front Tire | Giant S-R4, Front and rear specific, 700x25 |
| Rear Tire | Giant S-R4, Front and rear specific, 700x25 |
Geometry
Frame measurements by size.
Reference frame view
Select an available measurement to locate it on the frame.
All geometry measurements6 sizes · 9 measurements
| Measurement | XS/43.0 | S/46.5 | M/50.0 | M/L/53.5 | L/55.5 | XL/58.5 |
|---|---|---|---|---|---|---|
| Top tube | 515 mm | 530 mm | 545 mm | 560 mm | 575 mm | 1511.3 mm |
| Head tube | 125 mm | 145 mm | 165 mm | 185 mm | 205 mm | 571.5 mm |
| Head-tube angle | 71° | 72° | 72.5° | 72.5° | 72.5° | 72.5° |
| Seat-tube angle | 74° | 74° | 73.5° | 73° | 73° | 72.5° |
| Chainstay / rear center | 420 mm | 420 mm | 420 mm | 420 mm | 420 mm | 1066.8 mm |
| Wheelbase | 983 mm | 990 mm | 995 mm | 1007 mm | 1022 mm | 2633.98 mm |
| Reach | 365 mm | 373 mm | 377 mm | 381 mm | 390 mm | 398 mm |
| Stack | 523 mm | 545 mm | 566 mm | 585 mm | 604 mm | 623 mm |
| Standover height | 736.6 mm | 754.38 mm | 777.24 mm | 789.94 mm | 812.8 mm | 833.12 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 PG-950 Cassette 9 Speed, 11-32T
11-32T
More parts (5)

ENVE Twin Bolt Seatpost - Zero Offset UD Carbon, 30.9x400mm
30.9x400mm
Replacement option · verify fit
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
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: 2015 Giant Defy 3 · Road · Published sizes: XS, S, M, M/L, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: ALUXX-grade aluminum · Fork: Composite, Alloy OverDrive steerer · Carbon Fiber
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Sora · Front derailleur: Shimano Sora · Rear derailleur: Shimano Sora · Crankset: Shimano Sora, 34/50 · Bottom bracket: Sealed · Cassette: SRAM PG950 11x32, 9-speed · Chain: KMC X9
Brakes
Inspect the brakes →Archived: Brakes: Tektro R312
Wheels and tires
Check wheels and tires →Archived: Rims: Giant S-R2 · Hubs: Giant Tracker Sport Road, 26h · Front tire: Giant S-R4, Front and rear specific, 700x25 · Rear tire: Giant S-R4, Front and rear specific, 700x25
Controls and contact points
Archived: Handlebar: Giant Connect, 31.8mm · Stem: Giant Sport · Seatpost: Giant Sport, 30.9mm · Saddle: Giant Performance Road · Pedals: Caged w/ toe clip and strap
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





