Planet X Stealth Pro Carbon 650 Time Trial Frame

Frame Details

Sizing Guide

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.

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.