Planet X Uncle John Frame

From £99.99
£179.99
free UK delivery on orders > £20

Race light, anvil tough, do it all legend.

Our award winning Uncle John is ready for another blinding value season of whatever you want to do on it. His stability, speed and strength means he'll shoulder any other winter or year round workhorse duty as well. No wonder our Uncle John has won so many races, tests and riders hearts and at this price he'll win yours too.

Triple butted lightweight alloy frame
Frame weight 1820g
Rackmounts and mudguard eyelets
Canti bosses
Proper cross cable routing to keep the muck out

Note: Uses an external headset which adds the equivalent of approximately 35mm to the head tube length (depending on headset choice). Requires two barrel adjusters, available separately.

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Frame spec
Geometry
Sizing guide

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.