Giro
Register II MIPS
Everyday adult helmet with MIPS and a simple dial fit.
Universal Adult, 54–61 cm
View on AmazonPrice and availability on Amazon
Giant Road frame
Giant Defy Size Chart
Match your height to this model's size range, then confirm stack, reach, and standover on the brand's geometry chart.
- Frame sizes
- S–L · 4 sizes
- Rider height
- 5'5"–6'4"
- Height (cm)
- 165–193 cm
- Stack / reach · ML
- 577 / 384 mm
Defy Advanced size finder
Which Defy Advanced size covers your height?
Height gives you one size, or two when the published height ranges overlap. Stack, reach, and standover settle the overlap.
ft
in
Enter your height and the Defy Advanced size that covers it is marked in the tables below.
How to measureHeight gives the starting size. Standover and reach confirm it.
Height ranges
Where each size starts and ends
Height ranges for every Defy Advanced size, 161 to 197 cm overall. S: 165 to 175 cm. M: 171 to 181 cm. M/L: 177 to 187 cm. L: 183 to 193 cm.
- S165-175 cm
- M171-181 cm
- M/L177-187 cm
- L183-193 cm
161 cm179 cm197 cm
Size chart
Defy Advanced size by height
Use this as a starting range. Inseam, standover, and how you like to ride still decide the final size.
Size
Height
Fit note
S
165-175 cm
Starting size for smaller endurance-road riders.
M
171-181 cm
Balanced starting point for many riders.
M/L
177-187 cm
Half-step when M feels compact.
L
183-193 cm
Confirm reach and front-end height.
S
165-175 cm
Starting size for smaller endurance-road riders.
M
171-181 cm
Balanced starting point for many riders.
M/L
177-187 cm
Half-step when M feels compact.
L
183-193 cm
Confirm reach and front-end height.
Start with height. If two sizes overlap, use cycling inseam to choose.How to measure
Geometry
Defy Advanced geometry by size
Published stack, reach, and standover for Defy Advanced 2024. Height is the starting range on this page. Confirm the exact year on the official geometry source.
Size
Height
Stack
Reach
Standover
S
165-175 cm
541 mm
375 mm
733 mm
M
171-181 cm
558 mm
380 mm
762 mm
M/L
177-187 cm
577 mm
384 mm
796 mm
L
183-193 cm
596 mm
393 mm
814 mm
S
165-175 cm
- Stack
- 541 mm
- Reach
- 375 mm
- Standover
- 733 mm
M
171-181 cm
- Stack
- 558 mm
- Reach
- 380 mm
- Standover
- 762 mm
M/L
177-187 cm
- Stack
- 577 mm
- Reach
- 384 mm
- Standover
- 796 mm
L
183-193 cm
- Stack
- 596 mm
- Reach
- 393 mm
- Standover
- 814 mm
S165-175 cm
Stack541 mmReach375 mmM171-181 cm
Stack558 mmReach380 mmM/L177-187 cm
Stack577 mmReach384 mmL183-193 cm
Stack596 mmReach393 mm
How neighboring sizes compare
If two sizes both fit, compare reach and standover rather than assuming the larger size is more comfortable.
How to measure a bike frame- Size stepStackReachStandover
- S → M+17 mm+5 mm+29 mm
- M → M/L+19 mm+4 mm+34 mm
- M/L → L+19 mm+9 mm+18 mm
Starter kit
Helmet, light, lock, bottle, and a pant-leg strap. Size the bike here; buy the complete adult bike at a shop.
NiteRider
Swift 300
Compact USB headlight for commuting and dusk rides.
Handlebar mount, 300 lumens
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Kryptonite
Evolution Mini-7 with 4′ cable
Hardened U-lock plus a cable for wheels or a locked-together pair.
Fits most road, gravel, and hybrid frames
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CamelBak
Podium Chill 21 oz
Insulated squeeze bottle for everyday rides.
Fits a standard ~73 mm cage
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Green Guru
Narrow pant-leg strap
Upcycled inner-tube strap that keeps a pant leg off the chain.
Adjustable hook-and-loop, about 16 in long
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Bike size calculator
Find your Giant Defy Advanced size
Enter your height and inseam for a Giant road bike, then compare the result with this Defy Advanced chart.
Sizing notes
Why height alone is not enough
Riders with the same height can need different sizes because inseam, torso length, flexibility, and preferred handling differ.
2 checks
Defy is an endurance road bike, so fit should prioritize sustainable reach and bar height.
Use M/L only when M feels too short and L feels too stretched.
Sources
Confirm the exact bike after you have a starting size
Every number on this page comes from the sources below. Check the exact model year there before you buy.
Data reviewed:
Compare
Compare before buying
A size label does not mean the same thing across brands. Compare published geometry before you choose.
Related guides
More Giant and road sizing
Once you have a starting size, compare this frame against the Giant chart and the road guide.
Giant bike size chart
Compare Defy Advanced against broader Giant size guidance.
Road bike size chart
Check road sizing by height and inseam before choosing a frame.
Questions
Defy Advanced size chart FAQ
Short answers for Giant Defy Advanced sizing.
What size Giant Defy should I ride?
Use the Defy height range as a starting size, then verify inseam, stack, and reach against Giant's official geometry for the model year.
Is Giant Defy sizing upright?
Defy is designed around endurance road fit, but final posture depends on frame size, spacer setup, stem length, and your flexibility.