A Lightweight Climbing Frameset for Your Custom Road Build
The X-LAB RT9 Frameset is for riders who enjoy a road that points uphill. With a carbon frame engineered to weigh approximately 550 g, it gives you a lightweight starting point for a custom road bike built around the components and fit you want.
Finished in Shadowbox, the RT9 uses Toray T1100 and M40X carbon in a frame designed for climbing and road racing. It comes with an XDS carbon fork and carbon seatpost, ready for the next stage of your build.
Key Features
- Lightweight carbon frame: Approximately 550 g claimed frame weight
- Toray carbon construction: T1100 and M40X carbon in a climbing-focused frame
- XDS carbon fork: Toray T1100 carbon with a 12 × 100 mm front thru-axle
- Carbon seatpost: XDS 27.2 mm carbon seatpost
- UDH compatible: Compatible with a Universal Derailleur Hanger
- Custom build: Choose the drivetrain, wheels and finishing kit to suit your riding and fit
Who Is It For?
The RT9 is for road riders who want to build a lightweight performance bike, particularly if climbing, hilly races and long days in the mountains are high on the list.
It is also a good option if you already have a favourite groupset or wheelset, or simply want to choose the parts that go onto your next bike.
Our Thoughts
If you enjoy choosing every part of your bike, a frameset is a great place to start. The RT9 gives you a very light frame to build around, whether you are putting together a race bike or your ideal setup for long days in the hills.
Getting the size and riding position right matters just as much as saving weight. If you are unsure which size to choose or which parts you will need, have a chat with our team before ordering.
Specifications
- Frame: XDS carbon, Toray T1100 and M40X carbon
- Fork: XDS carbon, Toray T1100
- Front axle: 12 × 100 mm thru-axle
- Seatpost: XDS carbon, 27.2 mm
- Derailleur hanger: UDH compatible
- Claimed frame weight: Approximately 550 g
- Claimed frameset weight: 1.14 kg in size M, without headsets, as listed by X-LAB
- Colour: Shadowbox
- Sizes: S, M and L
The 550 g figure is an approximate frame weight, not the weight of the complete frameset or finished bicycle. Specifications and included parts may vary; please contact us to confirm the details before ordering.
Geometry
Measurements are from X-LAB’s RT9 Frameset geometry chart. Lengths are in millimetres unless otherwise stated.
| Measurement | S | M | L |
|---|---|---|---|
| Seat-tube length | 460 | 480 | 500 |
| Top-tube length | 520 | 540 | 563 |
| Head-tube length | 120 | 137 | 157 |
| Seat-tube angle | 74.2° | 74° | 73.5° |
| Head-tube angle | 71.7° | 73° | 73.5° |
| Chainstay length | 410 | 410 | 410 |
| Wheelbase | 977 | 978 | 992 |
| Bottom-bracket drop | 74 | 72 | 72 |
| Stack | 525 | 543 | 567 |
| Reach | 372 | 384 | 396 |
| Standover height | 728 | 750 | 769 |
| Front centre | 578 | 578 | 592 |
Choosing the right frame size depends on more than height alone. Contact our team if you would like help checking the geometry against your current bike or preferred riding position.
Why Buy from Chain Reaction?
- Custom build and component compatibility advice
- Professional workshop for assembly, setup and ongoing servicing
- Road-bike sizing and setup advice
- Finance options available
Visit Chain Reaction in Christchurch for a chat about your build. There are more than 200 free car parks on-site.
