Planet X Uncle John Cyclocross Frame
Planet X Uncle John Frame
If you're looking for a super-tough durable cyclocross or training/commuting bike to see you through the depths of winter, then look no further - the Planet X Uncle John is the most versatile frame in the range.
Uncle John is our classic cyclocross frame, updated with new 2012 revisions to keep it ahead of the crowd. Integrated headset, disc mounts, give it cutting edge performance, along with mudguard and bottle boss placement that mean it's happy on the daily commute or winter training ride.
Triple butted aluminium, developed from our award winning Superlight Team Alloy model, with the security of fatigue resisting gussets and revised internal butting profile. Uncle John - classic cyclocross from Planet X.
Uncle John is much more than the cyclocross race pedigree from where it began. The triple butted lightweight aluminium frame can withstand the very worst of weather conditions so in a world where strength and reliability is as important as speed and comfort the Uncle John comes in to its own.
It's been designed to accommodate full mud-guards to keep everything nice and dry and can take up to 35mm tyres. The rack mounts are an added plus. It's therefore equally at home on the commuter run as it is on the trickiest of cyclocross circuits.
Bike Radar rated the Uncle John 4.5/5 commenting on its "Confidence-inspiring ride and spot-on handling".
We love our Uncle John too.
Now available in Blue as well as Red with matching carbon fork (available separately or buy both together in our frameset package).
Frame Details
| Approx. Frame Weight (g) | 1820 |
| Seatpost Size (mm) | 31.6 |
| Seat Clamp Size (mm) | 34.9 |
| Front Mech Clamp Size (mm) | 34.9 |
| Wheels | 700C. with clearance for 38mm cross tyres |
| Mudguard mounts | Yes |
| Rack Mounts | Yes |
| Bottle Cage Bosses | 2 sets on all sizes |
| S | M | L | XL | ||
| A | Head Angle (°) | 71 | 72 | 72 | 72 |
| B | Head Tube Length (mm) | 110 | 140 | 170 | 190 |
| C | Effective Top Tube Horizontal (mm) | 522 | 542 | 568 | 588 |
| D | Seat Angle (°) | 74 | 74 | 73 | 72 |
| E | Seat tube Length Centre to Top (mm) | 510 | 540 | 570 | 590 |
| F | Chainstay Length (mm) | 435 | 435 | 435 | 435 |
| H | Standover Height | 780 | 810 | 840 | 880 |
Sizing Guide
| Rider Height | Suggested Frame Size |
|---|---|
| 5′3″ to 5′7″ (160cm-170cm) | Small |
| 5′8″ to 5′11″ (173cm-180cm) | Medium |
| 5′10″ to 6′2″ (178cm- 188cm) | Large |
| 6′1″ to 6′6″ (185cm- 198cm) | X-Large |
Sizing Notes
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.
