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Bicycle Design Software

Horizontal Component of Front Wheel Trail

anubah
Framebuilder
By anubah | 3:07 AM EDT, Fri August 22, 2025
BikeCAD Feature Request

BikeCAD has "Front Wheel Trail" and "Wheel Flop" as a standard frame measurements. As I interpret the BikeCAD drawings, Front Wheel Trail is the perpendicular distance between the steering axis and where the wheel intersects the ground (sometimes referred to as mechanical trail) and Wheel Flop seems to be the vertical component of Front Wheel Trail. Both these measurements is of great use to me but I fail to find the horizontal component of Front Wheel Trail among the standard measurements. While it's easy to calculate it would be nice to be able to display it and have it updated according to changes in the drawing.

Sorry if I'm just missing the measurement somewhere.

brgds /Jesper Hansén, Sweden

Brent
Profile picture for user Brent
www.bikecad.ca
Ottawa, ON Canada

Brent

6 months 3 weeks ago

Permalink

Horizontal component of Front wheel trail

You are correct that this dimension is not accounted for in BikeCAD. I can add it to the next update. Do you have any thoughts on what the dimension should be named?

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anubah
Framebuilder

anubah

6 months 2 weeks ago

Permalink

In reply to Horizontal component of Front wheel trail by Brent

Hmm, tricky.

Hmm, tricky.

In my opinion this dimension is the best indicator for the righting moment of the front end geometry. Maybe "Wheel Rightning" in order to follow "Wheel Flop"? Not sure everyone agrees with me though :-)

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Brent
Profile picture for user Brent
www.bikecad.ca
Ottawa, ON Canada

Brent

4 months ago

Permalink

New Dimension

I've just added this new dimension. I've called it Front Wheel Trail (X). I hope to have the new version out soon.

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