
Velopedia Bicycle Archive
2015 Giant Defy Advanced 1
Original manufacturer specifications including Shimano Ultegra drivetrain, 700c wheels, geometry for 6 published sizes.
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What Velopedia knows
- Model year
- 2015
- Category
- Road
- Original MSRP
- $2,650.00
- Sizes
- XS, S, M, M/L, L, XL
- Colors
- Composite/Orange/Silver, White/Red/Blue
- Geometry
- 6 manufacturer sizes · Geometry context
- Record coverage
- 26 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 1342047
Model history 5 other years
Frameset
| Frame Construction | Advanced-grade composite, Electronic ready |
|---|---|
| Frame Material | Carbon Fiber |
| Fork | Advanced-grade composite, Hybrid OverDrive steerer |
| Fork Material | Carbon Fiber |
| Rear Shock | N/A |
Drivetrain
| Component Group | Shimano Ultegra |
|---|---|
| Shifters | Shimano Ultegra |
| Front Derailleur | Shimano Ultegra |
| Rear Derailleur | Shimano Ultegra |
| Crankset | Shimano Ultegra, 34/50 |
| Bottom Bracket | Shimano, Press Fit |
| Cassette | Shimano Ultegra 11x28, 11-speed |
| Rear Cogs | Shimano Ultegra 11x28, 11-speed |
| Chain | KMC X11L |
| Pedals | N/A |
Brakes
| Brakes | TRP Spyre, Mechanical disc, 160mm |
|---|
Cockpit & Contact Points
| Handlebar | Giant Contact, 31.8mm |
|---|---|
| Stem | Giant Connect |
| Saddle | Giant Performance Road |
| Seatpost | Giant D-Fuse, Composite |
Wheels & Tires
| Hubs | Giant Performance Tracker Road Disc, Sealed bearing, 28h |
|---|---|
| Rims | Giant P-R2 Disc |
| Spokes | Sapim Race, 14/15g |
| Front Tire | Giant P-R3, Flat Guard Deflect 3, Front and rear specific, 700x25 |
| Rear Tire | Giant P-R3, Flat Guard Deflect 3, Front and rear specific, 700x25 |
| Wheel Size | 700c |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| 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 |
Geometry source: Giant first-party size geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
XS/43.0 geometry
Archive context: The seat angle of 74° sits toward the more relaxed end. The head angle of 71° sits close to the middle of the group. Its wheelbase of 983 mm sits close to the middle of the group.
Compared with 11 distinct road geometries in the XS-equivalent size cohort from model years 2015–2017 in the Velopedia archive.S/46.5 geometry
Archive context: The head angle of 72° sits close to the middle of the group. Its wheelbase of 990 mm sits close to the middle of the group. The seat angle of 74° sits close to the middle of the group.
Compared with 11 distinct road geometries in the Small-equivalent size cohort from model years 2015–2017 in the Velopedia archive.M/50.0 geometry
Archive context: Its reach of 377 mm sits somewhat shorter than typical. The chainstay of 420 mm sits somewhat longer than typical. Its wheelbase of 995 mm sits close to the middle of the group.
Compared with 15 distinct road geometries in the Medium-equivalent size cohort from model years 2015–2017 in the Velopedia archive.M/L/53.5 geometry
Archive context: Its wheelbase of 1007 mm sits close to the middle of the group. The seat angle of 73° sits close to the middle of the group. The head angle of 72.5° sits close to the middle of the group.
Compared with 10 distinct road geometries in the Large-equivalent size cohort from model years 2015–2017 in the Velopedia archive.L/55.5 geometry
Archive context: Its wheelbase of 1022 mm sits close to the middle of the group. The seat angle of 73° sits close to the middle of the group. The head angle of 72.5° sits close to the middle of the group.
Compared with 10 distinct road geometries in the Large-equivalent size cohort from model years 2015–2017 in the Velopedia archive.XL/58.5 geometry
Archive context: Its wheelbase of 2634 mm sits toward the longer end. The chainstay of 1066.8 mm sits toward the longer rear-center end. Its stack of 623 mm sits somewhat taller than typical.
Compared with 11 distinct road geometries in the XL-equivalent size cohort from model years 2015–2019 in the Velopedia archive.Parts & serviceability
Find replacement parts
More qualified parts (3)
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameInspect the frame in bright light, especially around the head tube, bottom bracket, chainstays and clamped areas. Look for cracks, ripples, crushed sections or signs of a previous impact.Inspect the frame and fork →
- BrakesMake sure both cables move freely and the calipers release cleanly. Check pad thickness, rotor wear and rotor alignment.Inspect the brakes →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 11-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
- Bottom bracketTurn the cranks slowly, feel for rough bearings and check for side-to-side play. Creaking under load deserves investigation but does not identify the source by itself.Inspect the bottom bracket and shell →
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 Advanced 1 · Road · Published sizes: XS, S, M, M/L, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Advanced-grade composite, Electronic ready · Fork: Advanced-grade composite, Hybrid OverDrive steerer · Carbon Fiber
Drivetrain
Check drivetrain wear →Archived: Group: Shimano Ultegra · Shifters: Shimano Ultegra · Front derailleur: Shimano Ultegra · Rear derailleur: Shimano Ultegra · Crankset: Shimano Ultegra, 34/50 · Bottom bracket: Shimano, Press Fit · Cassette: Shimano Ultegra 11x28, 11-speed · Rear cogs: Shimano Ultegra 11x28, 11-speed · Chain: KMC X11L
Brakes
Inspect the brakes →Archived: Brakes: TRP Spyre, Mechanical disc, 160mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c · Rims: Giant P-R2 Disc · Hubs: Giant Performance Tracker Road Disc, Sealed bearing, 28h · Front tire: Giant P-R3, Flat Guard Deflect 3, Front and rear specific, 700x25 · Rear tire: Giant P-R3, Flat Guard Deflect 3, Front and rear specific, 700x25
Controls and contact points
Archived: Handlebar: Giant Contact, 31.8mm · Stem: Giant Connect · Seatpost: Giant D-Fuse, Composite · Saddle: Giant Performance Road
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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