Is this something I need worry about? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

InfernoMan2011 · 02-24-2021, 07:14 PM

After a LONG time of waiting, I finally ordered my new wheels and tires this afternoon and think I may have made a minor mistake. On my 2011 LT I'm upgrading the stock 18" wheels with 245/55/R18s to 20" Vision Legend 5's in chrome finish fitted with Continental Extreme Contact DWS06 Plus tires. However, I ordered these in 255/45/R20s as they were $15 less a piece than the 245/45/R20s. This change in tire height introduces a 1 mph error in my Speedometer at 65 mph (which doesn't seem like a big deal since it's a small margin). However, I've read this change also impacts the odometer as well. I'm sure this is a very simple question, but I don't deal with tire sizing on a regular basis. This is my first time installing upgraded wheels on a vehicle and I thought I'd done all my research. I was just going off the recommended tire sizes for 20" wheels for 2010 Camaro in the stickied thread here. I ordered in store through Discount Tire and they will be doing the install. I'm more concerned with error in odometer reading that the Speedometer really. Thanks for any feedback. I'm probably worried about nothing but want to be sure.

Vegas Bound · 02-24-2021, 07:31 PM

I have oversized tires on my truck. Speedo and odo are off by 3 mph. I guess that means I get 3 free miles per 60 miles driven.

Avenging Orange · 02-24-2021, 08:21 PM

Nothing to worry about.

larry_g · 02-24-2021, 08:31 PM

If you were off more, like 10%, I would suggest that it can be adjusted with a tune, but 1 mph is not a big deal.

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Sir Nuke · 02-25-2021, 08:32 AM

not a big deal....especally since we are talking about 1 mph....have no worries.

InfernoMan2011 · 02-25-2021, 09:56 PM

Thanks for feedback! I'm not going to worry about it for now, but a buddy at work has a friend with a shop and calibration tools who will likely re-calibrate my speedo as a favor. If that's an option I might as well take advantage of it.

Vegas Bound · 02-26-2021, 07:56 AM

Quote:

Originally Posted by InfernoMan2011

Thanks for feedback! I'm not going to worry about it for now, but a buddy at work has a friend with a shop and calibration tools who will likely re-calibrate my speedo as a favor. If that's an option I might as well take advantage of it.

Leave it. When it comes time to sell or trade, the odometer will read shorter than actual.

02-24-2021, 07:14 PM	#1
InfernoMan2011 Drives: 2011 Inferno Orange 1LT Join Date: Apr 2011 Location: Arkansas Posts: 199 View My Garage	Is this something I need worry about? After a LONG time of waiting, I finally ordered my new wheels and tires this afternoon and think I may have made a minor mistake. On my 2011 LT I'm upgrading the stock 18" wheels with 245/55/R18s to 20" Vision Legend 5's in chrome finish fitted with Continental Extreme Contact DWS06 Plus tires. However, I ordered these in 255/45/R20s as they were $15 less a piece than the 245/45/R20s. This change in tire height introduces a 1 mph error in my Speedometer at 65 mph (which doesn't seem like a big deal since it's a small margin). However, I've read this change also impacts the odometer as well. I'm sure this is a very simple question, but I don't deal with tire sizing on a regular basis. This is my first time installing upgraded wheels on a vehicle and I thought I'd done all my research. I was just going off the recommended tire sizes for 20" wheels for 2010 Camaro in the stickied thread here. I ordered in store through Discount Tire and they will be doing the install. I'm more concerned with error in odometer reading that the Speedometer really. Thanks for any feedback. I'm probably worried about nothing but want to be sure.

02-24-2021, 07:31 PM	#2
Vegas Bound Drives: 2013 Sparkly Red One Join Date: Dec 2018 Location: Hospitality State Posts: 2,506	I have oversized tires on my truck. Speedo and odo are off by 3 mph. I guess that means I get 3 free miles per 60 miles driven. __________________ Lots of bolt on stuff Bests in each category 0.000 - RT 1.36 - 60' 6.29 - 1/8 mile 10.18 - 1/4 mile

02-24-2021, 08:21 PM	#3
Avenging Orange Drives: 2010 Inferno Orange 2SS/RS Join Date: Apr 2010 Location: Clermont, IN Posts: 3,238	Nothing to worry about. __________________ 2010 Inferno Orange 2SS/RS M6 Black Leather, Sun Roof, OBX Headers, Borla touring axle back, Cold Air Inductions CAI , non synthetic fluids, BMR total bushing upgrade/1" lowering springs, DSE 32mm rear sway bar. GM fe4 shocks/struts/LCA's, AAM 3.91 diff, Vertini RFS1.8 20x9 +30. Conti ExtremeContact Sport 275/35/20. sjm autoprod ABL dash kit. Mike Norris tuned 413/419. Avenging Orange: 43 years of not buying into the Hype........and damn proud of it!! https://youtu.be/9JD9it6SmB8 KICKING CANCERS ASS SINCE 2015!!

02-24-2021, 08:31 PM	#4
larry_g Drives: 2014 1SS/1LE Join Date: Nov 2015 Location: Louisville, KY Posts: 498	If you were off more, like 10%, I would suggest that it can be adjusted with a tune, but 1 mph is not a big deal. Sent from my Pixel 5 using Tapatalk __________________ Daily Driven, 683WHP 554WTQ, Whipple 2.9 @ 8lbs Boost, Tuned by Blevins Tuning on 93 Octane, LSA SBE, ATI LS3 Damper, AFR 260cc Mongoose, ARP Studs, Yella Terra Ultralites, Johnson 2110R, BTR PDS Stage 3, Melling 10355, Improved Racing Baffle, ID1050X, 1LE Fuel Pump, RotoFab CAI, Stainless Works 1-7/8" LTH to 3" Speed Eng w/ NPP, Powermaster 9509 XS, Detroit Speed Motor Mounts, Revshift insert, MGW, Monster LT1-S, GForce 3.5" Aluminum, ZL1 Calipers, DBA Rotors & Pads, Bilstein B6 Struts & Shocks, BMR 1.25" Drop Springs & Adj Rear Bar, Pegasus Solid Bushings, Z/28 Wheels, other misc parts.

02-25-2021, 08:32 AM	#5
Sir Nuke Master of All Things Drives: '20 Corvette Stingray Join Date: Jul 2009 Location: Southeast of Houston, Texas Posts: 20,707 View My Garage	not a big deal....especally since we are talking about 1 mph....have no worries. __________________

02-25-2021, 09:56 PM	#6
InfernoMan2011 Drives: 2011 Inferno Orange 1LT Join Date: Apr 2011 Location: Arkansas Posts: 199 View My Garage	Thank you Thanks for feedback! I'm not going to worry about it for now, but a buddy at work has a friend with a shop and calibration tools who will likely re-calibrate my speedo as a favor. If that's an option I might as well take advantage of it.