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Challenger SRT Hellcat
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Discussion Starter · #1 ·
Looking to get an MT street R tire for the track. I'd like to get a 17" rim but not sure which tire size to go with.

I have seen a 315/50/17 MT street r on a WB Hellcat RE and admire the thick look. I believe the 50 sidewall is a taller tire as opposed to a 45 sidewall street r tire.

Is it unnecessary to go with a tire as big as an 315/50/17 on a stock NB 2.62 gear Hellcat?

Reason I'm asking is because the MT street r with a 45 sidewall 17" tire has a shorter diameter height as opposed to an 18" street r with a 45 sidewall so I figured I make up that extra diameter height with the 50 sidewall plus I think a taller tire will look better.

Never seen how a 305/45/17 tire looks on the back of an NB Challenger in person to judge how it looks being a shorter tire and see if I like it or not but I'm curious to know if possibly going with a 315/50/17 MT street R is over kill and if there are any cons to it as opposed to the 305/45/17 street r tire?
 

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2017 Dodge Challenger Hellcat
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125 Posts
Looking to get an MT street R tire for the track. I'd like to get a 17" rim but not sure which tire size to go with.

I have seen a 315/50/17 MT street r on a WB Hellcat RE and admire the thick look. I believe the 50 sidewall is a taller tire as opposed to a 45 sidewall street r tire.

Is it unnecessary to go with a tire as big as an 315/50/17 on a stock NB 2.62 gear Hellcat?

Reason I'm asking is because the MT street r with a 45 sidewall 17" tire has a shorter diameter height as opposed to an 18" street r with a 45 sidewall so I figured I make up that extra diameter height with the 50 sidewall plus I think a taller tire will look better.

Never seen how a 305/45/17 tire looks on the back of an NB Challenger in person to judge how it looks being a shorter tire and see if I like it or not but I'm curious to know if possibly going with a 315/50/17 MT street R is over kill and if there are any cons to it as opposed to the 305/45/17 street r tire?
I used the 305/45 for a while, it certainly rubbed, but it wasn't the worst. I ended up going with 28x11.5 17 et street r bias tire and had no issue with either tire when it came to traction the 28x11.5 doesn't rub either. just my input if you dont mind, 28x11.5 converts to 292/50 btw
here's a link if interested

 

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Challenger SRT Hellcat
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Unless your car is over 800rwhp and you have a 3.09 gear you will probably be faster on the 305/45 vs the 315/50. On a NB you need a 17X10 with 26 or 30 offset. Forgestar DB5 or JMS Savage wheels work well for a budget set up. 305/45 will fit with only shorter sway bar end links and zip tying your active suspension shock wires out of the way. 315/50 requires beating down a few ribs in the inner fender and it helps to run a 3mm spacer from speed logix.
The 315 looks better than the 305, it fills the wheel well better and looks better overall imo, but it's too much tire for a stockish Hellcat, is much harder to find, and requires fender well mods on a NB to fit.
 

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Charger SRT Hellcat
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Unless your car is over 800rwhp and you have a 3.09 gear you will probably be faster on the 305/45 vs the 315/50. On a NB you need a 17X10 with 26 or 30 offset. Forgestar DB5 or JMS Savage wheels work well for a budget set up. 305/45 will fit with only shorter sway bar end links and zip tying your active suspension shock wires out of the way. 315/50 requires beating down a few ribs in the inner fender and it helps to run a 3mm spacer from speed logix.
The 315 looks better than the 305, it fills the wheel well better and looks better overall imo, but it's too much tire for a stockish Hellcat, is much harder to find, and requires fender well mods on a NB to fit.
Damn, EXCELLENT info!
 

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Challenger SRT Hellcat
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Discussion Starter · #5 ·
Unless your car is over 800rwhp and you have a 3.09 gear you will probably be faster on the 305/45 vs the 315/50. On a NB you need a 17X10 with 26 or 30 offset. Forgestar DB5 or JMS Savage wheels work well for a budget set up. 305/45 will fit with only shorter sway bar end links and zip tying your active suspension shock wires out of the way. 315/50 requires beating down a few ribs in the inner fender and it helps to run a 3mm spacer from speed logix.
The 315 looks better than the 305, it fills the wheel well better and looks better overall imo, but it's too much tire for a stockish Hellcat, is much harder to find, and requires fender well mods on a NB to fit.

Appreciate the response. So most likely seems 305/45/17 will do just fine on a stock cat and seem to suit it better. As you mentioned the 315/50 looks better because it fills up the wheel well better which was a concern with the 305/45/17 being a little short in heightand looking odd?

I have 20x10.5 rep wheels and 305-35-20 on the back of my car. Would the 305/45/17 be shorter in height than that??
 

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Challenger SRT Hellcat
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Yes they would be shorter.
They are not quite a half in shorter than the stock tire if I remember correctly.
The 3054517 would be for sure a better bet for stockish power on a 2.62 gear cat.
The shorter tire changes the ratio to be the equivalent of 2.82 or so.
 

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Challenger SRT Hellcat
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Discussion Starter · #7 ·
Yes they would be shorter.
They are not quite a half in shorter than the stock tire if I remember correctly.
The 3054517 would be for sure a better bet for stockish power on a 2.62 gear cat.
The shorter tire changes the ratio to be the equivalent of 2.82 or so.

Thank you sir, I believe you use a 17x10" wheel for the track correct? If so which wheel do you use if you don't mind me asking and if you have any pics by chance to see how it looks?

Since you've ran your stock Cat on 20/10.5 wheels with 305/35/20 drag radial tires, have you noticed a big improvement in 1/4 mile times with the 17x10 as opposed to the 20/10.5 wheels?
 

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Challenger SRT Hellcat
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I use a 17x9.5 RaceStar on the back.
The car is definitely quicker with the 17's .
Some of the big improvement is likely attributed to the Mickey ET'R vs the
Nitto 555R.
There is 0.33 difference in best ET between the 2. Obviously not on the same day but similar w
challenger-24-2.jpg
eather.
I run at a good track and the 60' is about 0.14 or more better with the 17" MT combo.
There is quite a bit of weight difference also which helps.

I will try to find a pic.
 
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