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How We Size Our Frames

Compact Road Frame

Compact Litespeed frame sizes are based on the intersection of the virtual top tube and seat tube. The actual size is based on the virtual seat tube length. The virtual seat tube is measured from the center of the bottom bracket shell to the point where the virtual top tube meets the centerline of the seat tube extending into the seat post region. The virtual top tube is the horizontal line parallel to the ground and extending from the point at which the centerline of the top tube meets the centerline of the head tube.

Standard Road Frame

All Litespeed standard road frame sizes are measured in a center to top format from the center of the bottom bracket shell to the intersection of the centerline of the seat tube and top tube.(A) Top tube lengths on our road frames are taken from the intersection of the centerlines of the seat tube and top of the top tube to the horizontal intersection on the centerline of the head tube.(B)


Standard Mountain Frame

All Litespeed mountain frames are measured from the center of the bottom bracket shell to the intersection of the top of the top tube and the centerline of the seat tube. Top tube lengths on hardtails are taken from the intersection of the centerlines of the top tube and seat tube to the point at which a horizontal line intersects the centerline of the headtube. Top tube lengths on full suspension bikes are measured from the point where the centerline of the top tube meets the centerline of the head tube in a horizontal line to the centerline of the seat tube.

Time Trial Frames

The Saber and Blade are measured from the center of the bottom bracket to the top of the seat tube, but on the Blade 10cm have to be deducted because of the extended seat tube. The top tube length is measured from the centerline at the top of the seat tube to the point at which a horizontal line meets the centerline of the head tube. NOTE: The horizontal intersection at the head tube may intersect at a point in space above the actual head tube but along its centerline.

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