yep, went to Hummer and got me some take-off's

5 BFG All terain 315's @ 100 a piece, tax included = $500

5 mount and balanc @ 20 a piece, tax included = $100

20 dollar tip for the tire jockey = $20
__________

Total for one Badd@ss looking truck with a full size spare $620

What a difference from stock. Does anyone know how much my speedo is off now? If i want to do 70, what should my spedometer read?

thx fella's

 

What size were the originals and what size are you now? 315/__ R 17?

 

i went from the stock 265/70/17 to 315/70/17

thx again

 

I think it would be 64.4-ish (someone correct me if I'm wrong). Here's a web site that does the calculations for you:

Tire size calculator

According to this, your speedometer will be 8.739% too slow.

70mph divided by 1.08739 = 64.374

 

Go to the dealer or any one else with a ODD and reprogram the tire size...the speedo and shift points will work correctly then. The BFG website will give you the revolutions per mile...the number you will need to reprogram.

 

Yes,

The speedo will be 8.7% slow. So when your speedo says 70 MPH you will be going 76.1 MPH.

Be careful easy to get nabbed that way, especially when you are tired.

 

Or keep it and just get outlook and adjust speed on that speedo then u got the Extended Warranty

 

Until they figure out you have a programmer or box...then oops warranty voided.

 

Thanx for the speedy replies fella's. Yes, i will goto the dealer to get it REcalibrated. I have some other issues i want attended to as well. I just dont think i will get there for a few weeks, and i needed to know what speed to drive



thx again you guys are great

 

Outlook doesnt mean you have a Programer or anything just digital gauges

 

Maybe so but try explaining that to your dealer.....Uuuuhh Mr Service Writer, the only reason I have the Bully Dog outlook monitor is so that I can set my defueling points, measure my boost pressure, erase engine codes etc etc....I "really" don't have any kind of performance chip or programmer whatsoever.....eh..I don't think so at least with my dealer. Heck they even look under the hood to see if you have velcro to hold your module and they look at the wiring to see if you tapped in anywhere. Things like this really draw their attention to dig deeper if you know what I mean.

 

According to BFG the revolutions per mile on that tire are 601. When I got mine the dealer did the reprogramming for free. Now I think they've been told they are supposed to charge some crazy amount like $70.

 

I got charged $85.00!!!

 

ha if they spot the velcro tell them you tried mounting your ez pass toll pod there but it wouldn't register through the hood to the toll collector.... just too lazy to take the velcro off.

 

HdPower,
I've actually climbed under the hood in the service drive to disconnect the Outlook with the service manager/salesman standing next to me. It's a gauge that can interfere with their diagnostics. They don't seem to care but they are not all that anti-boxes. They infact sell Hypertech's. One of my buddy's who just switched to the dark side (duracrap) had the same experience at the chevy dealership. We all know you have to shop your dealership.