Help With Tire Size For Ksport Lowering Springs

[DaBlackPearl]

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!

[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.

[DaBlackPearl]

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.

Thanks Jimmy...That is a cool little tool.

[DaBlackPearl]

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%

[BOS/SRT]

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.

[DaBlackPearl]

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.

[BOS/SRT]

yeah, the fronts aren't too difficult, but the rears can be pita. keep us posted and don't forget the pix. thanks!

[DaBlackPearl]

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.

[FinallyCharged]

way better Phil!!! B R A V O!!!

[BOS/SRT]

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!

[DaBlackPearl]

way better Phil!!! B R A V O!!!

Thank you for always busting my chops to lower my Pearl...I love it so far!

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!

Thank you for the compliment and the help. That link was great!

[BOS/SRT]

no problem, just glad to help and becareful with those slopes, lol.

[FinallyCharged]

u can thank me later Phil, im glad i made this happen!! lol

[DaBlackPearl]

u can thank me later Phil, im glad i made this happen!! lol

I wouldn't say that you made it happen unless you want to pay for what I have invested...:) I would say that your were an influence though.:rolleyes:

[FinallyCharged]

oh yes!!