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MobSled · 01-13-2010, 06:11 AM

Here's the deal guys...this past Saturday I decided to lower my truck, 5/6 drop. I was running a 255/70/15 tire all the way around which we all know is too tall for a lowering job like that. Decided to run 245/60 and 275/60/15 in the rear. Now for some reason I lost my mph. My speedo shows 70 when in reality I'm doing 55-60.

Any inpuit would be greatly appreciate...btw its a 1977 c10 LWB.

My 2 questions are what caused this, how do I get my top speed back?

01-13-2010, 06:11 AM	#1
MobSled Registered User Join Date: Oct 2009 Location: Downey, CA Posts: 110	Speedo? Here's the deal guys...this past Saturday I decided to lower my truck, 5/6 drop. I was running a 255/70/15 tire all the way around which we all know is too tall for a lowering job like that. Decided to run 245/60 and 275/60/15 in the rear. Now for some reason I lost my mph. My speedo shows 70 when in reality I'm doing 55-60. Any inpuit would be greatly appreciate...btw its a 1977 c10 LWB. My 2 questions are what caused this, how do I get my top speed back?



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