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Defy Advanced 1 with Shimano 105 Di2, alloy P-R1 wheels & Gavia Fondo 32c tubeless tyres—engineered for smooth, confident endurance riding.
Defy Advanced 1 with Shimano 105 Di2, alloy P-R1 wheels & Gavia Fondo 32c tubeless tyres—engineered for smooth, confident endurance riding.
Giant

Giant Defy Advanced 1 Road Bike 2026 in Thundercloud

£2,799.00
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Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
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Hassle free returns

In the unlikely event that you are not satisfied with your purchase please feel free to return your items within 90 days of the purchase date for a full exchange or refund. Any item (excluding food, underwear or e-gift vouchers) can be returned to us for any reason within 90 days, provided that the item has not been used or fitted and is returned in its original packaging with valid proof of purchase.

It is recommended that you use a recorded delivery service or return to a store to ensure your items are received by us. We cannot assume responsibility for items that are lost in transit back to us.

Returning an item

Online or in-store purchases can be returned to any of our 12 stores free of charge or can be returned by post or courier at your cost after completing the online returns form below. If you are returning an item due to a fault, we will refund your postage costs.

Bikes & Bulky items

If you wish to return a bike or bulky item to us, please keep the box it arrived in and let us know by contacting our support team via our online webchat, email or by phone (020 45063856) and we will help arrange a collection.

Non Bike - Customer Returns Form

If you wish to return or exchange an item, please fill out the form below following the steps inside. Returns can be processed quicker if all required information is provided.




Terms & Conditions

Items must be returned in their original packaging and unused. Refunds will be issued once the product(s) have been received and inspected.

Click & Collect customers can buy with confidence knowing that they can review the item before deciding whether it is right for you before leaving the store. Should you decide it's not right for you, it can be conveniently exchanged or refunded straight away, or you still have up to 90 days to return it if you are still unsure.

Please note:
1. If the items we have sent you are faulty, damaged or not as we described, we will cover the cost of collection and the delivery of the correct item.

2. If we have delivered the correct bike but upon inspection, you decide the bike is not the one for you, we will charge you £50 for collection (£100 from Northern Ireland). If you do not have the original box in usable condition, we will charge you an additional £15 to provide one.

Refunds will be processed using the same method of payment used for the original purchase. Credit & debit card refunds must be made to the card used for the original purchase.

We are unable to offer a refund without a valid proof of purchase.

Giant Defy Advanced 1 Road Bike 2026 in Thundercloud

Season:2026

Brand:Giant

Code:9031022Thundercloud

Fancy an upgrade?

Exclusive Star Buy - Wheelset upgrade

Balfe's Bikes are offering up to 30% off Carbon wheelsets when buying this bike, we recommend Giant's SLR 2 Carbon Hookless Wheelset. We have both the 36mm deep rims for £520, and the 50mm deep rim for £565 (links open in new tab).

The Giant Defy Advanced 1 is designed for riders who want lightweight endurance performance and all-day comfort. Built around an Advanced-grade Composite frame and fork with D-Fuse compliance, it’s equipped with Shimano 105 Di2 electronic shifting, hydraulic disc brakes, and alloy P-R1 wheels. Paired with Gavia Fondo 32c tubeless tyres, it balances smooth efficiency with confident stability across endurance terrain.

With effortless efficiency and quiet compliance, this lightweight endurance road machine helps you ride stronger and longer. The composite frame and purpose-built components smooth out rough roads and minimize fatigue.

Functional Simplicity
Free of cumbersome gimmickry, the frameset is one of the lightest in its category. With a perfect balance of high-performance reactivity and all-day comfort, it offers a “less is more” experience for modern endurance road riding.

Engineered Compliance
Advanced-grade composite frame and fork are specifically engineered for endurance road riding, delivering a smooth and efficient ride quality that minimizes fatigue on long rides. The new D-Fuse components work together to further absorb road shocks and vibrations.

Total Control
New Contact D-Fuse handlebar features ergonomic shaping and an 8-degree flare for comfort and control on all-day rides. Wide, rims are optimized for high-volume tubeless tyres providing predictable handling and stability from asphalt to cobbles.

Key Features & Benefits:

  • Endurance-tuned frameset:Advanced grade composite delivers lightweight stiffness and smooth compliance for long rides.
  • Wireless precision:Shimano 105 Di2 12-speed electronic shifting and hydraulic disc brakes for precision and confidence.
  • Confident control:Giant P-R1 Disc wheels with 32c Gavia Fondo tubeless tyres provide grip, comfort, and predictable handling.

Full Specification:

  • Frame: Advanced-grade Composite, 12x142mm thru-axle, disc
  • Fork: Advanced-grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc
  • Number of Gears: 24
  • Gear Shifters: Shimano 105 Di2
  • Chainset: Shimano 105, 34/50 XS:165mm, S:165mm, M:170mm, M/L:170mm, L:172.5mm, XL:172.5mm
  • Chainrings: 34/50
  • Rear Cassette: Shimano 105, 12-speed, 11x36
  • Chain: KMC X12L-1
  • Front Derailleur: Shimano 105 Di2
  • Rear Derailleur: Shimano 105 Di2
  • Bottom Bracket: Shimano, press fit
  • Pedals: Not included – Shop pedals here
  • Rims: Giant P-R1 Disc wheelset, alloy, [F]25mm, [R]25mm
  • Front Hub: Giant alloy, 12mm thru-axle
  • Rear Hub: Giant alloy, 12mm thru-axle
  • Front Tyre: Giant Gavia Fondo 0, tubeless, 700x32c (33.5mm), folding
  • Rear Tyre: Giant Gavia Fondo 0, tubeless, 700x32c (33.5mm), folding
  • Brakes: Shimano 105 Di2 hydraulic, Shimano SM-RT64 rotors [F]160mm, [R]160mm
  • Handlebars: Giant Contact SL D-Fuse XS:404/380mm, S:404/380mm, M:424/400mm, M/L:424/400mm, L:444/420mm, XL:444/420mm
  • Handlebar Tape: Stratus Lite 2.0
  • Stem: Giant Contact AeroLight XS:80mm, S:90mm, M:100mm, M/L:100mm, L:110mm, XL:110mm
  • Saddle: Giant Approach
  • Seatpost: Giant D-Fuse, composite, 14mm offset
  • Accessories: Tubeless prepared, 40mm max tyre size
  • Weight: TBC
Manufacturers reserve the right to change specifications without notice based on availability at the point of assembly.

Sizing Chart for Giant Defy Advanced

Frame SizeRider Height (cm)Rider Height (' ")
XS160 - 1685'2" - 5'5"
S166 – 1745'5" - 5'9"
M172 – 1805'8" - 5'11"
ML178 – 1865'10" - 6'1"
L184 – 1926'0" - 6'4"
XL189 - 1996'2" - 6'6"

Geometry Information for Giant Defy Advanced


bike diagram with measurements referenced in table that follows
XSSMMLLXL
ASeat Tube Length(MM)410445480515535565
BSeat Tube Angle74.5°74.0°73.5°73.0°73.0°73.0°
CTop Tube Length(MM)515530545560575595
DHead Tube Length(MM)125135150175195215
EHead Tube Angle70.5°71.8°72.5°72.5°72.5°72.5°
FFork Rake(MM)505050505050
GTrail(MM)71.663.458.658.658.658.6
HWheelbase(MM)995994998101010251040
IChain Stay Length(MM)420420420420420420
JBottom Bracket Drop(MM)757575707070
KStack(MM)527541558577596615
LReach(MM)369375380384393402
MStand Over Height(MM)705733762796814841
NHandlebar Width(MM)404404424424444444
OStem Length(MM)8090100100110110
PCrank Length(MM)165165170170172172


Warranty Information for Giant

ComponentWarranty Period
Bicycle frame (Downhill excluded)Lifetime
Rigid Forks10 Years
Downhill frame3 Years
Giant own brand components, Pedals, grips, bar tape, saddle, Paint & Decals2 Years
Electronic E-bike components including battery2 Years (or 600 charge cycles)
For full warranty policy please visit giant-bicycles.com
Sizing Information
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