Planet X Stealth Pro Carbon New Logo TT / Triathlon Frame
NOW INCLUDING AERO SEATPOST
Updated version of the all time classic Planet X carbon speed weapon.
Our multiple award and race winning full carbon clock killing aero frame has just picked up its 3rd bike of the year award from 220 magazine. The full 12k carbon fibre machine is also the bike that UK time trial legend Ian Cammish wanted to buy off us on cheque spread before we gave him a job instead. Naturally wind dodging, fast, stiff and super responsive, all at a cost that's below most alloy competitors.
Note: The frame does not include forks or barrel adjusters. These should be purchased separately.
Over recent years, the Planet X name has become synonymous with top quality bikes and cycling components at the best value prices. The company, based in Rotherham, South Yorkshire, took the cycling world by storm with hugely popular and highly acclaimed road bikes such as the Planet X Pro Carbon, Team Alu and Nanolight, as well as the award-winning Stealth and Exocet time trial bikes. The design and attention to detail doesn't stop with carbon road frames though - other legendary specialist products like the Planet X Uncle John cyclo-cross frame continue to excel in events where reliability, speed and performance are absolutely essential.
Planet X is more than just another online bike shop - alongside its own extensive range of bikes, frames and cycling products sit top quality components, clothing, spares and accessories from all the big-name manufacturers such as Shimano, FSA, Guerciotti, Giro, Schwalbe, Continental and SRAM - plus, a devotion to value combined with extensive buying power gives Planet X the opportunity to deliver amongst the lowest prices in Europe direct to the cycling public in the UK and beyond.
Planet X has received praise and awards from customers and the cycling industry alike. 220 Triathlon magazine has voted the Stealth time trial bike its 'Bike of the Year' award for the 3rd time, and awarded the Exocet a Best in Test - citing its astonishing quality and value for money compared to its competitors.
Planet X, together with its sister brand On-One, continues to pursue its aim of offering high-spec road, track, time trial, mountain, commuter and fixie bikes direct to the consumer, cutting out the middleman and slashing prices to the absolute minimum. The Company has been at the leading edge of the British bike scene for years and is now branching further afield with aims to deliver the same award-winning formula internationally.
| Approx. Frame Weight (g) | 1410 |
| Seatpost Size (mm) | Aero |
| Seat Clamp Size (mm) | Oval |
| Front Mech Clamp Size (mm) | Braze on boss |
| Wheels | 650C. 25mm tyres will just about fit, but we recommend 19 – 22mm for best performance |
| Mudguard mounts | No |
| Rack Mounts | No |
| Bottle Cage Bosses | 1 Set |
| XXS | XS | ||
| A | Head Angle (°) | 72 | 72 |
| B | Head Tube Length (mm) | 95 | 115 |
| C | Effective Top Tube Horizontal (mm) | 470 | 490 |
| D | Seat Angle (°) | 78 | 78 |
| E | Seat Tube Length Centre to Top(mm) | 470 | 500 |
| I | Stack (mm) | 449 | 468 |
| J | Reach (mm) | 371 | 388 |
Designed in collaboration with Dan Empfield, the renowned slowtwitch guru of 650 bike geometry, the 650 stealth comes with a 78 degree seat angle and is designed for smaller riders of around 5 foot 6 or less. This finally means that smaller riders can get a bike to fit them without the compromises and problems associated with 700c versions of small tri bikes.
| Rider Height | Suggested Frame Size |
|---|---|
| 5′0″ to 5′3″ (152cm-160cm) | XX-Small |
| 5′3″ to 5′6″ (160-167cm) | X-Small |
All frame size recommendations are approximate. A good fit will also depend on the correct choice of stem length, correct bike set-up for the rider and riding style.
Correct frame size choice can vary greatly with riders' torso length. If you have longer legs and a shorter torso, go for a slightly shorter stem. If you think you are borderline between sizes, and you have longer legs and a shorter torso, go for the smaller frame size. If you have shorter legs and a longer torso, go for the larger frame size to get the extra top tube length.
As the frame sizes increase, so does the length of the head tube. If you are inflexible or perhaps have a history of back problems, consider going for a larger frame size. This will increase the relative height of the handlebars making the position less “extreme”. The larger frame will also have a longer top tube, so you’ll need to compensate for this with a shorter stem.
Planet X athlete Susanne Buckenlei, has won the worlds toughest Iron-distance Triathlon; The Norseman again! Breaking her previous course record ... more
The new Planet X Stealth Elite Dura Ace is out now, offering 82/101 carbon wheels, Dura Ace transmission and PB ... more
We’ll soon be receiving a delivery of our legendary Stealth Pro Carbon and ultra stiff Pro Carbon Track framesets and ... more
The Planet X technical expert and no stranger to dual carriageways Ian Cammish has divulged the following excerpts from his ... more
Time-Trial legend and PX resident tech expert Ian Cammish explains why these wheels have become our most popular TT / ... more


Ride faster and avoid injury with a Retul bike fitting half price fit with the purchase of a new bike
Two and a half grand's worth of bike for just over a grand courtesy of summer sales and an amazing ... more
Be green and save money use the cycle to work scheme
Free next day delivery in the UK by courier on orders over £20 more info

Or visit our help section to find out about:
NEW - Ask Big Frank!