Wheelbase Question

[Chuck Most]

Stupid 'newbie' question here, I know, but how does one measure the wheelbase on a rig with more than one rear axle? Do you measure from the centerline of the front axle to the centerline of the rear axle nearest the front, or the rear? Would a tag axle count? Thanks for any info!

[Jim B]

You measure from the center line of the front axle to the center point BETWEEN the two drive axles. Tag axles & pusher axles wouldn't count.

[Chuck Most]

Got it. Thanks! The info will come in handy.

[mackinac359]

For a tridrive/tridem the measurement would be the center of the center axle. If a twin-steer the measurment would be from the center of both front axles.

Tim

[Chuck Most]

Thanks! It's all making sense now - I was messing around with an Ertl Transtar Eagle earlier, trying to replicate a 1:1 truck. I had the wheelbase measurement, but using the rear axle centerlines it looked WAY off! Now, knowing where the rear axles SHOULD be positioned for the wheelbase, it looks a LOT better.