Giant 2025 TCR Advanced 1 - 105 Di2 KOM Road Bike

The Giant TCR Advanced 1 - 105 Di2 KOM (2025) is a lightweight carbon race road bike with Shimano 105 Di2 electronic shifting and an Advanced-Grade composite frame and fork, built for climbing, cornering and sprinting, with room for up to 33mm tyres.

Key highlights

• Category: Carbon race road bike, disc brake, electronic shifting
• Brand: Giant (Taiwan), TCR Advanced platform, 2025 model year (KOM)
• Frame: Advanced-Grade Composite, disc, 12x142mm thru-axle; fork Advanced-Grade Composite with full-composite OverDrive steerer, 12x100mm thru-axle
• Groupset: Shimano 105 Di2, 12-speed electronic, 34/50T crankset, 11-36T cassette
• Wheels & tyres: Giant P-R2 wheelset (36mm rim depth front and rear) with Giant Gavia Course 1 tubeless tyres, 700x25c; frame rated for up to 33mm tyre clearance
• Best for: Riders who want Giant's all-round race geometry with fast, precise electronic shifting and minimal adjustment, while keeping the KOM climbing gearing

TCR Advanced - Built to Go Faster

Whether you're climbing, cornering or launching an attack, this all-new composite road racer is made for that moment. Lightweight, efficient, and integrated for speed, it's engineered to give you a competitive edge in every situation.

System optimization

The frameset, wheels, cockpit and other parts were engineered, developed and tested together to perform as a system. The all-new Contact AeroLight stem allows for cable routing that integrates the top cap, cables and spacers in a more aerodynamic, user-friendly setup.

Winning efficiency

Featuring a greater stiffness-to-weight ratio than the previous generation, along with new aero tube shaping and a lighter overall weight, this uncompromising race bike delivers explosive acceleration and unyielding pedaling stiffness. The result is race-winning performance in the moments that count.

Integrated aerodynamics

All tube shapes were engineered and developed using Computational Fluid Dynamics (CFD) modeling and wind-tunnel testing. From the truncated ellipse shape of frameset tubing to a new cockpit design and component integration, it all adds up to a more streamlined profile that improves overall aero performance. The Variant seatpost adds just enough compliance for a balanced, race-tuned feel on the road, while generous tire clearance (up to 33mm) and compliant wheels keep you rolling with speed on smooth or bumpy roads.

Key features of the TCR Advanced range

1. Advanced Composite

High-performance grade raw carbon material is used to produce this custom frame material in Giant's own composite factory with a high stiffness-to-weight ratio. The front triangle is assembled and molded as one continuous piece in a proprietary manufacturing process called Modified Monocoque Construction.

2. Truncated ellipse tubing

Strategically engineered airfoil sections in the frame and fork, developed through CFD and wind-tunnel testing, improve aerodynamic efficiency, reducing wind drag at a wide range of yaw angles compared to traditional teardrop shaped tubes.

3. Internal cable routing

Frame/handlebar/stem feature unique cable porting for a sleek, non-cluttered appearance and easier adjustability. The Di2 electronic wiring is also routed internally for a clean cockpit.

4. Composite fork

Advanced-grade composite fork features a symmetric design and aero shaping, along with disc-brake integration and increased clearance for tyres up to 33mm. The design makes it lighter, stiffer and more aerodynamic.

5. Aerodynamic handlebar and stem

Lightweight handlebar and stem feature aero shaping including flat handlebar tops with raised edges to help riders maintain a stable aero position. Internal cable routing further improves aerodynamics while maintaining ease of setup and adjustment.

6. Variant seatpost

This proprietary seatpost design offers the perfect balance of light weight, aerodynamic performance and compliance, along with easy saddle installation and adjustment.

7. MegaDrive

An oversized down tube and top tube provide superior front end lateral and torsional stiffness. The precisely engineered, rectangular shaped down tube yields unprecedented steering precision and pedaling performance.

8. PowerCore

The oversized bottom bracket area features a fully integrated 86mm wide design. Symmetric chainstays provide additional stiffness on the driveside and stability on the non-driveside.

9. Disc-brake integration

The frame and fork are engineered with flat-mount disc-brake technology for powerful, consistent braking performance in all conditions. Thru-axles front (12x100mm) and rear (12x142mm) add stiffness, precision and stopping power.

 

Full specifications

Frame	Advanced-Grade Composite, 12x142mm thru-axle, disc
Fork	Advanced-Grade Composite, full-composite OverDrive steerer, 12x100mm thru-axle, disc
Shifters	Shimano 105 Di2
Front Derailleur	Shimano 105 Di2 FD-R7150
Rear Derailleur	Shimano 105 Di2 RD-R7150
Brakes	Shimano 105 Di2 hydraulic, Giant MPH rotors, [F]160mm / [R]140mm
Crankset	Shimano 105, 34/50T (crank length varies by size: 170mm XS/S, 172.5mm M/ML, 175mm L/XL)
Cassette	Shimano 105, 12-speed, 11-36T
Chain	KMC X12L-1
Bottom Bracket	Shimano, press fit
Rims	Giant P-R2, [F]36mm / [R]36mm
Hubs	12mm thru-axle
Spokes	Stainless
Tyres	Giant Gavia Course 1, tubeless, 700x25c (28mm), folding; frame rated for up to 33mm tyre clearance
Handlebar	Giant Contact (width varies by size: 40cm XS/S, 42cm M/ML, 44cm L/XL)
Stem	Giant Contact AeroLight (length varies by size: 80mm XS, 90mm S, 100mm M, 110mm ML/L, 120mm XL)
Grips	Stratus Lite 2.0
Seatpost	Giant Variant, composite, -5/+15mm offset
Saddle	Giant Approach
Colours (Jollymap)	Asphalt Green, Mars Dust
Sizes (Jollymap)	XS, S, M, ML, L, XL

Specifications source: Giant official product page (giant-bicycles.com), TCR Advanced 1 KOM (2025). Giant's international English page lists R8150; this has been corrected to R7150 based on Giant's official Taiwan spec chart and the Shimano 105 Di2 part number.

 

TCR Advanced Size Selection Guide

Not sure which size to choose? Giant publishes an official recommended height range for each frame size, which you can use alongside the geometry table below, or use our professional size fitting service to confirm.

Size	Recommended height (Giant official)
XS	157–169 cm
S	165–175 cm
M	171–181 cm
ML	177–187 cm
L	183–193 cm
XL	189–199 cm

Height ranges are Giant's own reference recommendation, not a guarantee of fit — riders with longer or shorter limbs relative to height may suit a different size. Source: Giant official product page.

*All specifications and prices listed are subject to change without notice.

 

TCR Advanced 1 vs TCR Advanced 2 (KOM, 2025)

Both models share the exact same Advanced-Grade Composite frame, geometry and wheelset. The main difference is the groupset:

Source: Giant official product pages, TCR Advanced 1 KOM and TCR Advanced 2 KOM (2025) specifications.

Prefer a more relaxed endurance geometry instead of a race geometry? See Jollymap's Giant 2026 Defy Advanced 2 105 (D-Fuse compliance, up to 40mm tyre clearance). Want to compare race bikes across brands? Jollymap also carries the Merida Reacto 5000 Gen 5 105 Di2 (also Di2 electronic, aero race bike) and the Cannondale SuperSix EVO 4 (all-round race bike).

 

Professional Size Fitting and Bike Fit Services

Unsure about sizing or want to ride more efficiently while avoiding injury? Welcome to learn about Jollymap's size fitting and bike fit services.

 

FAQ

How much does the TCR Advanced 1 - 105 Di2 KOM weigh?

Giant does not publish a single official weight for this model. Giant's own specification page states that weight varies by frame size, colour finish, hardware and installed accessories, and recommends having your bike shop weigh the actual unit for an accurate figure. Don't assume the weight from another size or another model.

What size should I get?

Use Giant's official recommended height ranges above as a starting point (for example, 171–181cm for size M), then check the full geometry table for reach and stack against a bike that already fits you well. Because saddle height, arm length and flexibility all affect fit, we recommend a Jollymap Bike Fit session to confirm before you buy, especially if you're between two sizes.

What's the difference between the TCR Advanced 1 and TCR Advanced 2?

Both use the same Advanced-Grade Composite frame, geometry and Giant P-R2 wheelset. The difference is the groupset: this Advanced 1 comes with Shimano 105 Di2 electronic shifting for fast, precise shifts with button-adjustable trim; the Advanced 2 uses Shimano 105 mechanical shifting, which is lower priced and simpler to maintain day-to-day.

How is the Di2 system charged, and what maintenance does it need?

Shimano 105 Di2 is a semi-wireless system: the shifters connect wirelessly, while the front and rear derailleurs share a single battery via wiring inside the frame. The charging port is on the rear derailleur (RD-R7150) — charge it with a Shimano charging cable, and the rear derailleur's LED shows the battery level. In Hong Kong's humid climate, periodically check the charging port and connectors for moisture or corrosion, and contact us if you need guidance on care.

How does the TCR Advanced differ from the Giant Defy or Propel?

The TCR Advanced uses a lower, more aggressive race geometry built for speed and all-round performance. The Defy uses a relaxed endurance geometry with D-Fuse compliance for long rides and rough roads, while the Propel is a dedicated aero race bike. If you race or want the most agile handling, the TCR Advanced is the most all-round of the three ranges.

What's the difference between the KOM gearing and the PC build?

According to Giant's official specifications, the KOM version of the TCR Advanced range uses a 34/50T crankset with an 11-36T cassette — an easier climbing gear range. The PC version uses a more aggressive gear range with a lower-profile wheelset. The 2025 TCR Advanced 1 and Advanced 2 currently listed at Jollymap are both KOM builds.

Is this bike tubeless-ready, or does it come with inner tubes?

Giant's official specification lists the wheels and tyres as "tubeless prepared." Please contact us before ordering to confirm exactly what's included for tubeless conversion on the current stock.

How do disc brakes hold up in Hong Kong's hot, humid weather?

Shimano 105 Di2 hydraulic disc brakes generally give more consistent stopping power on wet roads than rim brakes, which suits Hong Kong's summer weather. As with any hydraulic system, we recommend a periodic brake fluid and pad check, particularly if you're riding long descents regularly.

 

Last updated: September 2026