Firehawk Indy 500 40 Series Tires

Mr. Texas · 07-18-2018, 04:43 PM

I had Discount Tire order me some Firestone Indy 500 tires. Instead of ordering 245/40R20 and 275/35R20 they ordered 245/45R20 and 275/40R20. They let me know when I got there, but I didn't think my Runflats could made it another mile around the block so I had them put them on. The new tire is in total an inch taller. I think the car rides better honestly,but in the back of my mind I made a mistake now. Is the 3.8% difference in tire going to make a huge difference in acceleration and braking? I don't race the car and it is strictly a daily driver, but the thought of hindering performance kills me.

enzia35 · 07-18-2018, 07:28 PM

I wouldn't worry about any perceptible performance hit.

TJay74 · 07-19-2018, 09:45 AM

It wont hurt performance, it will help with bump compliance. May want to make sure it doesnt rub in the rear and damage the harness that is back there.

It will throw your speedo and odometer off though.

ToeKnee Sea · 07-19-2018, 10:04 AM

Speedo my be a bit off due to larger circumference.

DFWZ28 · 07-19-2018, 11:07 AM

why firestones? isnt there much better tire options out there?

jrob56 · 07-19-2018, 11:38 AM

Quote:

Originally Posted by DFWZ28

why firestones? isnt there much better tire options out there?

The Indy 500s are cheap and have great reviews, we just put a set on a 4th gen we got back together and so far really liking them.

BradfordCamaro · 07-19-2018, 11:38 AM

Quote:

Originally Posted by DFWZ28

why firestones? isnt there much better tire options out there?

For much higher cost.

The 500s perform much higher than their low cost suggests

Rock-It Man · 07-19-2018, 12:04 PM

The sizes they ordered are for Gen5.

They are idiots.

VinnAY · 07-19-2018, 01:44 PM

I ran the 500s on my Mustang GT/PP and they're phenomenal, especially in the price which comes from the Firestone name which if they were marked as the Bridgestone RE003 (which they are) you'd be paying more for them.

Redlinez · 07-19-2018, 02:02 PM

It's pretty much them then the Pilot Sport 4S IMO.

Mr. Texas · 07-19-2018, 04:35 PM

Quote:

Originally Posted by DFWZ28

why firestones? isnt there much better tire options out there?

I did some searching on the forums before I got them and everyone raved about them. $800 installed out the door wasn't bad and it rides nice.

Mr. Texas · 07-19-2018, 04:36 PM

Quote:

Originally Posted by Rock-It Man

The sizes they ordered are for Gen5.

They are idiots.

That explains it. He was probably looking at my 2011 SS in the system.

Mr. Texas · 07-19-2018, 04:39 PM

Thanks for the feed back everyone. I think the performance is all in my head. These tires hook a lot better than the run flats. Also the tire feels the fender up making it look like the car is lowered. EXCEPT the car sits up .5" higher now lol

VinnAY · 07-19-2018, 06:13 PM

That's a serious F up on their part they need to fix that and not have you be OK with it. As stated your speedo and more importantly odometer are going to be off due to the tire height differences. I haven't run the sizes to see but what if for every half mile you travel the odo ticks off 3/4 of a mile? Think about it. Or the other way around?

07-18-2018, 04:43 PM	#1
Mr. Texas Drives: 2016 Mosiac Black 2SS A8 Join Date: Apr 2011 Location: Richmond, Tx Posts: 127	Firehawk Indy 500 40 Series Tires I had Discount Tire order me some Firestone Indy 500 tires. Instead of ordering 245/40R20 and 275/35R20 they ordered 245/45R20 and 275/40R20. They let me know when I got there, but I didn't think my Runflats could made it another mile around the block so I had them put them on. The new tire is in total an inch taller. I think the car rides better honestly,but in the back of my mind I made a mistake now. Is the 3.8% difference in tire going to make a huge difference in acceleration and braking? I don't race the car and it is strictly a daily driver, but the thought of hindering performance kills me.

07-18-2018, 07:28 PM	#2
enzia35 Drives: '16 Garnet Red 1SS Join Date: Mar 2014 Location: College Station, TX Posts: 3,449	I wouldn't worry about any perceptible performance hit. __________________ '16 Camaro 1SS '18 Miata GT Gone: '01 Camaro, '14 Camaro, '90 Miata

07-19-2018, 09:45 AM	#3
TJay74 Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016 Location: Norman, OK Posts: 2,424	It wont hurt performance, it will help with bump compliance. May want to make sure it doesnt rub in the rear and damage the harness that is back there. It will throw your speedo and odometer off though. __________________ 2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp 2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD

07-19-2018, 11:07 AM	#5
DFWZ28 Drives: 2010 SS Join Date: May 2012 Location: Rockwall, TX Posts: 1,603 View My Garage	why firestones? isnt there much better tire options out there? __________________

07-19-2018, 02:02 PM	#10
Redlinez Shifts under load Drives: 2020 Camaro 1SS 1LE rally green Join Date: Apr 2017 Location: Fuquay-Varina, NC Posts: 1,295	It's pretty much them then the Pilot Sport 4S IMO. __________________ 24 Audi S3 prem plus, sport package HPDE - southeast - JTI- solo, PCA- blue. 22 Suzuki GSX-S 1000GT blue

07-19-2018, 10:04 AM	#4
ToeKnee Sea Drives: 2018 Camaro SS 1LE Join Date: Jun 2018 Location: Harrisburg, NC Posts: 96	Speedo my be a bit off due to larger circumference.

07-19-2018, 12:04 PM	#8
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,043 View My Garage	The sizes they ordered are for Gen5. They are idiots.

07-19-2018, 01:44 PM	#9
VinnAY Account Suspended Drives: 18 1SS/1LE Join Date: Jun 2018 Location: Missouri Posts: 939	I ran the 500s on my Mustang GT/PP and they're phenomenal, especially in the price which comes from the Firestone name which if they were marked as the Bridgestone RE003 (which they are) you'd be paying more for them.

07-19-2018, 04:39 PM	#13
Mr. Texas Drives: 2016 Mosiac Black 2SS A8 Join Date: Apr 2011 Location: Richmond, Tx Posts: 127	Thanks for the feed back everyone. I think the performance is all in my head. These tires hook a lot better than the run flats. Also the tire feels the fender up making it look like the car is lowered. EXCEPT the car sits up .5" higher now lol

07-19-2018, 06:13 PM	#14
VinnAY Account Suspended Drives: 18 1SS/1LE Join Date: Jun 2018 Location: Missouri Posts: 939	That's a serious F up on their part they need to fix that and not have you be OK with it. As stated your speedo and more importantly odometer are going to be off due to the tire height differences. I haven't run the sizes to see but what if for every half mile you travel the odo ticks off 3/4 of a mile? Think about it. Or the other way around?

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