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Does Vehicle Speed Need to Be Reduced Due to Difference In Trailer Tire Size vs. Vehicle  

Updated 04/17/2025 | Published 04/12/2025

Question:

Hi There, Im wondering If Im driving my truck at 81 MPH with a 31 overall height tire, then obviously your shorter overall height tire would be traveling faster than my 81 MPH. Question: So, Is your rating of 81 MPH actually based on the vehicles speedometer thats pulling it, or should I reduce my vehicles speed to reach the 81 MPH rating? Thanks

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Expert Reply:

Hi Mark; you do not need to reduce your vehicle speed or make any calculations like that if you're using the # AM3S050 on your trailer. As long as the speedometer on your vehicle doesn't go over 81 mph you won't have an issue.

expert reply by:
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Robin H
Loadstar ST175/80D13 Bias Trailer Tire
Loadstar ST175/80D13 Bias Trailer Tire
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Mark profile picture

Mark

4/17/2025

Robin, Thank you so much for the info. Just wanted to let you know, I don’t plan on cruising at 80+ mph, but sometimes you have to go with the flow to keep from getting run over.ha Mark

Robin H. profile picture
Etrailer Expert

Robin H.

4/17/2025

@Mark oh I definitely understand. One way or another it is always best to know your limitations just to be safe.

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