Need to adjust speedo to new tires and wheels

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		Dodge Cummins Diesel Forum > General Forums > Tires & Wheels Forum
Need to adjust speedo to new tires and wheels

Tires & Wheels Forum Discussion of Tires and Wheels...pretty obvious, eh?

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06-15-2010, 10:44 PM	#1 (permalink)
dalton06 Cummins Nut Join Date: Jul 2007 Location: Canton,Ga Posts: 312 Thanks: 8 Thanked 2 Times in 2 Posts iTrader Score: 0 reviews dalton06's Truck Pics	Need to adjust speedo to new tires and wheels Ok. Just got a set of 20's and some 275-65-20. I tried adjusting my speedo and monitor to what I thought equaled outto 34" tires. Its still not reading right. Is it not 34"??? __________________ 06 2500, Bullydog w/ Outlook Monitor, Boost Fooler, AEM Brute Force Intake, CFM+ Intake, Silverline 4" Duals,POS Auto Meter Phantom Gauges, BD aux lift pump

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06-15-2010, 10:58 PM	#2 (permalink)
throttlejocky316 Cummins Enthusiast Join Date: Jul 2009 Location: Ogden, UT Posts: 235 Thanks: 24 Thanked 27 Times in 25 Posts iTrader Score: 0 reviews throttlejocky316's Truck Pics	I have 37" tires on my truck and I had to adjust the speedo for 36" tires before the speedo and gps said the same thing. __________________ 2007.5 6.7/68RFE MegaCab Laramie Longbox 4x4, Smarty, Juice/Att, 5" TBE, Shibby Stage 1, S&B intake, 6" lift w/ Pure Progressive Coils, 37" Yoko AT/S', DPF/CAT/EGR/COOLER MIA

06-17-2010, 04:14 PM	#3 (permalink)
vintagespeed Diesel Freak Join Date: May 2010 Location: Rancho Cucamonger, CA Posts: 612 Thanks: 16 Thanked 36 Times in 34 Posts iTrader Score: 1 reviews vintagespeed's Truck Pics	how are you guys adjusting the speedo/computer? __________________ '06 2500 QCSB 48RE 4x4, 5" turbo-back no kitty (until THE MAN makes me re-install it), GDP MK2, Predator Perf. tune, 4" lift 33s on 20s, RevMax billet TC & beefed 48RE, DiProcol Optix

06-17-2010, 05:44 PM	#4 (permalink)
dalton06 Cummins Nut Join Date: Jul 2007 Location: Canton,Ga Posts: 312 Thanks: 8 Thanked 2 Times in 2 Posts iTrader Score: 0 reviews dalton06's Truck Pics	Some downloaders let u adjust tire size. But like bullydogs pos it can't be trusted. So my best bet to get it right is take it to dealer and let them do it? __________________ 06 2500, Bullydog w/ Outlook Monitor, Boost Fooler, AEM Brute Force Intake, CFM+ Intake, Silverline 4" Duals,POS Auto Meter Phantom Gauges, BD aux lift pump

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