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02-06-2010, 12:01 AM
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#1
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Senior Member
Join Date: Feb 2010
Location: So. Cal.
Name: Phil
Age: 58
Posts: 177
Car Model: Dodge Charger
Year: 2007
Engine: V6
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Help With Tire Size For Ksport Lowering Springs
In the old days I just cut springs to get the desired stance but I will admit that I am not a super skilled mechanic and I don't want to hurt my Pearl and want to do it right.
I just ordered new rims the same size I have now 20 x 8.5 I know that some will say that I should go 22" but I just don't want big wheels. Anyway, I want to lower Pearl with some springs that someone keeps telling me to get... Cough..Julio...Cough and the tire size that I have is 245 45 20. This is the tallest tire I could go with my 20's to try to fill the gap.
The question is if anyone knows if I am going to ok with these or do I need to get 245 40 20. My tire guy said to ask the manufacturer of the spring kit the max tire size recommended which I asked the seller and they did not have that info. The back wheels look like they will be ok but I am worried about the front which looks like it will be close once everything settles. I was also told that when turning I might have an issue.
I believe the formula for this is that the max diameter should not exceed 28.5" and no wider than 10" but I am hoping that someone out there knows the magic answer before I order the tires.What I might end up doing is lowering it on the wheels and tires that I have now so that if there is rubbing I know to get the 245 40 20
Please Help!!
Thanks!
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02-06-2010, 12:58 AM
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#2
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Administrator
Join Date: Feb 2010
Location: Boston
Name: Jimmy
Posts: 601
Car Model: Dodge Charger SRT8
Year: 2006
Engine: 6.1L HEMI
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go to this site, http://1010tires.com/TireSizeCalculator.asp and get the exact differences and that will give you a better idea on your space. i would think that it wouldn't be an issue, especially with 8.5 width wheels. the only issue i would think of, is the front upper arm bolt. i just shaved mines down a little and no issues.
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__________________
Jimmy - BRIGHT SILVER METALLIC SRT8 I,II,III 2toned Flat Black Vinyl,CarbonbyDesign,Billet Tech Designer,Razor Edge,SpeedLogix,KW v2,Predator 91 tune,22" 3 pc Covet Forged Wheels ,Nitto 420s,BWoody Sway ends,Hotchkis sways,Magnaflow highflow/c-back,DMH electric cutouts,22elite,BND ALL Quantum Blue/ACESIV,Killerglass,GSM intake,Danko v2 spoiler/Chin spoiler,Grip Rockers,Neffywrap
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02-06-2010, 01:40 AM
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#3
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Senior Member
Join Date: Feb 2010
Location: So. Cal.
Name: Phil
Age: 58
Posts: 177
Car Model: Dodge Charger
Year: 2007
Engine: V6
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Originally Posted by BOS/SRT
go to this site, http://1010tires.com/TireSizeCalculator.asp and get the exact differences and that will give you a better idea on your space. i would think that it wouldn't be an issue, especially with 8.5 width wheels. the only issue i would think of, is the front upper arm bolt. i just shaved mines down a little and no issues.
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Thanks Jimmy...That is a cool little tool.
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02-06-2010, 02:05 AM
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#4
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Senior Member
Join Date: Feb 2010
Location: So. Cal.
Name: Phil
Age: 58
Posts: 177
Car Model: Dodge Charger
Year: 2007
Engine: V6
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I was told about a tire size comparison calculator (Thanks Jimmy) and the size that I was sold 2 years ago turns out to be just a tad over the reccomended max size and I haven't had any trouble so far...*shrug*
Below is a side by side comparison from the stock 215/65/17 and 245/45/20 as well as the overall diameter of the 40 series.
Thanks Jimmy. so far I have learned a lot in a short amount of time. I am liking this site already.
Stock Tire - 215/65R17 >Search Tires Tire 1 - 245/45R20 >Search Tires
Section Width: 8.46 in 215 mm
Section Width: 9.64 in 245 mm
Rim Diameter: 17 in 431.8 mm
Rim Diameter: 20 in 508 mm
Rim Width Range: 6 - 7.5 in
Rim Width Range: 7.5 - 9 in
Overall Diameter: 28.00 in 711.2 mm 215/65/17 (stock)
Overall Diameter: 28.68 in 728.47 mm 245/45/20 (current setup)
Overall Diameter: 27.71 in 703.83 mm 245/40/20
Sidewall Height: 5.50 in 139.7 mm
Sidewall Height: 4.34 in 110.23 mm
Radius: 14.00 in 355.6 mm
Radius: 14.34 in 364.23 mm
Circumference: 87.96 in 2234.1 mm
Circumference: 90.10 in 2288.5 mm
Revs per Mile: 742.8
Revs per Mile: 725.2
Actual Speed: 60 mph 100 km/h
Speedometer1: 58.5 mph 97.6 km/h
Speedometer Difference: - Speedometer Difference: 2.426% too slow
Diameter Difference: - Diameter Difference: 2.38%
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02-06-2010, 03:53 AM
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#5
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Administrator
Join Date: Feb 2010
Location: Boston
Name: Jimmy
Posts: 601
Car Model: Dodge Charger SRT8
Year: 2006
Engine: 6.1L HEMI
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Another standard size for the srt was 255/45-20, which gives it a slight increase in diameter for stock setup and something you can compare it to.
Glad I could help. Let me know if I can help with anything else.
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__________________
Jimmy - BRIGHT SILVER METALLIC SRT8 I,II,III 2toned Flat Black Vinyl,CarbonbyDesign,Billet Tech Designer,Razor Edge,SpeedLogix,KW v2,Predator 91 tune,22" 3 pc Covet Forged Wheels ,Nitto 420s,BWoody Sway ends,Hotchkis sways,Magnaflow highflow/c-back,DMH electric cutouts,22elite,BND ALL Quantum Blue/ACESIV,Killerglass,GSM intake,Danko v2 spoiler/Chin spoiler,Grip Rockers,Neffywrap
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02-15-2010, 12:50 AM
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#6
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Senior Member
Join Date: Feb 2010
Location: So. Cal.
Name: Phil
Age: 58
Posts: 177
Car Model: Dodge Charger
Year: 2007
Engine: V6
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Springs are here but I need a new floor jack and some jack stands. I was hoping to have the springs installed this weekend but I'll probably just pay someone to install since I work 12 hours a day. Pics coming soon.
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02-15-2010, 03:11 PM
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#7
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Administrator
Join Date: Feb 2010
Location: Boston
Name: Jimmy
Posts: 601
Car Model: Dodge Charger SRT8
Year: 2006
Engine: 6.1L HEMI
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yeah, the fronts aren't too difficult, but the rears can be pita. keep us posted and don't forget the pix. thanks!
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__________________
Jimmy - BRIGHT SILVER METALLIC SRT8 I,II,III 2toned Flat Black Vinyl,CarbonbyDesign,Billet Tech Designer,Razor Edge,SpeedLogix,KW v2,Predator 91 tune,22" 3 pc Covet Forged Wheels ,Nitto 420s,BWoody Sway ends,Hotchkis sways,Magnaflow highflow/c-back,DMH electric cutouts,22elite,BND ALL Quantum Blue/ACESIV,Killerglass,GSM intake,Danko v2 spoiler/Chin spoiler,Grip Rockers,Neffywrap
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02-18-2010, 02:00 AM
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#8
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Senior Member
Join Date: Feb 2010
Location: So. Cal.
Name: Phil
Age: 58
Posts: 177
Car Model: Dodge Charger
Year: 2007
Engine: V6
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Ok...I got her dropped today. These pics are crappy and my Pearl is dirty so I apologize. I just wanted to share. The KSport springs are good quality and are way better than stock. I am not 100% happy with the rear as it only dropped about 1.25 right now so I have a slight rake. I will fix it if it doesn't even out.
Front Before
![](http://i232.photobucket.com/albums/ee107/BlackPearlCharger/Lowered%20pics/FrontBefore.jpg)
Rear Before
![](http://i232.photobucket.com/albums/ee107/BlackPearlCharger/Lowered%20pics/RearBefore.jpg)
Front After
![](http://i232.photobucket.com/albums/ee107/BlackPearlCharger/Lowered%20pics/FrontAfter.jpg)
Rear After
![](http://i232.photobucket.com/albums/ee107/BlackPearlCharger/Lowered%20pics/RearAfter.jpg)
Overall look.
![](http://i232.photobucket.com/albums/ee107/BlackPearlCharger/Lowered%20pics/Dropped1.jpg)
Better pics soon. After looking at the pics, the rear isn't too bad now...It must have settled a little more driving back to work. *shrug*
Thanks for all the help. Watch for the new tires and wheels getting mounted very soon.
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02-18-2010, 09:20 PM
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#9
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Member
Join Date: Feb 2010
Location: San Diego, CA
Name: Julio
Age: 38
Posts: 76
Car Model: Dodge Charger
Year: 2007
Engine: 5.7 Hemi
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way better Phil!!! B R A V O!!!
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__________________
![](image.php?s=de9e1aa0291f6384a2b9f97c8d7a543b&u=16&type=sigpic&dateline=1265320727)
2007 Road & Track "Hemini"
Grip Front End-22" Gloss Black Staggered Sevas S-10s-6000k Hids (Lows & Fogs)-Hood Struts-20% Tint All Around-Demolded-SLP Loudmouth 1 w/5" Black Tips-Custom Trufiber 1" Cowl Ram Air Hood-Eibach Pro Kit Lowering Springs-Stack Performance Intake-Predator 91 Oct CAI Tune-180 T-Stat-Trunk With no Wing and Charger Script Emblem-Custom Vinyls-Interior L.E.D.S.-Rear SRT Diffuser
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02-19-2010, 12:35 AM
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#10
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Administrator
Join Date: Feb 2010
Location: Boston
Name: Jimmy
Posts: 601
Car Model: Dodge Charger SRT8
Year: 2006
Engine: 6.1L HEMI
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Congrats! Looks killer now bro! Btw, don't worry she'll drop at least a 1/4 to 1/2 when it settles.! Congrats again!
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__________________
Jimmy - BRIGHT SILVER METALLIC SRT8 I,II,III 2toned Flat Black Vinyl,CarbonbyDesign,Billet Tech Designer,Razor Edge,SpeedLogix,KW v2,Predator 91 tune,22" 3 pc Covet Forged Wheels ,Nitto 420s,BWoody Sway ends,Hotchkis sways,Magnaflow highflow/c-back,DMH electric cutouts,22elite,BND ALL Quantum Blue/ACESIV,Killerglass,GSM intake,Danko v2 spoiler/Chin spoiler,Grip Rockers,Neffywrap
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