The Giant Propel Advanced Pro 1 Di2 is an aero road bike built to go fast in a straight line, fast out of corners, and fast when you're tired and still need to hold a wheel.
Giant has redesigned the frameset for this generation, dropping weight while adding torsional and pedalling stiffness. In plain terms, when you stamp on the pedals to close a gap or launch a sprint, the bike responds immediately. There's no flex soaking up your effort.
This Giant Propel looks sharp in person, a clean metallic finish that catches the light without being flashy. If you're after a silver Giant road bike that doesn't scream for attention in the café car park, this is it.
Frame and compliance
The Advanced-grade composite frame is lighter than the previous Propel generation. Giant has also reworked the Vector seatpost to give more vertical compliance, so the back end absorbs road buzz better over longer distances.
The fork and integrated cockpit do the same up front. The result is a bike that stays comfortable at mile 80, which matters if you're racing, training through winter, or grinding out long weekend rides on UK roads that are rarely smooth.
Tyre clearance has increased to 32mm. That's enough room for a higher volume road tyre that smooths out chip seal and rough tarmac, letting you carry speed with less fatigue. On British B-roads, where the surface changes every few hundred metres, that extra cushioning adds up.
Aerodynamics
Giant's AeroSystem frame shaping, integrated cockpit and aero WheelSystem are designed to work together as a single unit. Internal cable routing and a clean front profile reduce drag at speed. The wheels and tyres are matched to minimise rolling resistance alongside the frame's aero profile. When you're driving the pace on a flat road or taking a long pull on the front of a group, you hold speed more efficiently. That's where an aero bike earns back the money you spend on it, in the watts you save at 38kph when your legs are starting to fade.
Groupset
Shimano Di2 electronic shifting (check the specific groupset level with us if it matters to your decision) gives you precise, consistent gear changes under load. On a racing bike in the UK, where you're often shifting on wet, greasy roads or mid-effort on a climb, electronic shifting removes the missed shifts that can cost you a gap or break your rhythm.
Spec summary
- Advanced-grade composite aero frame, lighter than the previous Propel
- Vector seatpost with improved compliance
- Integrated aero cockpit with internal routing
- Shimano Di2 electronic groupset
- Giant aero WheelSystem
- Up to 32mm tyre clearance
- Hydraulic disc brakes
Who is this bike for?
The Giant Propel Advanced Pro 1 Di2 suits road racers, fast club riders and anyone who wants a lightweight aero road bike that performs well in crits, road races and fast group rides. If you spend most of your time on the drops, riding hard, and you want a bike that rewards that effort with speed, this is the right kind of machine.
Riders who prioritise comfort on very long endurance rides or want a more upright position might prefer Giant's Defy range instead. But if your riding leans toward intensity and you want a high-performance aero bike that still handles well enough for UK sportives and hilly terrain, the Propel fills that gap well.
The Propel Advanced Pro 1 competes with frames costing more from other brands. It's a strong option if you're looking for a carbon aero road bike for sale in the UK at this level, and the spec sheet holds up well against what else is out there in the same bracket. The Giant bike range goes deeper if you want to compare it against the Propel Advanced Pro 0 or the SL models above.