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Hi everyone, I have a 2019 scat pack shaker with 245/45/20 Goodyear tires from the factory. I wanted to ask what is the biggest size I can go without compromising ride comfort. Thanks!
 

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As far as I know, no issue running 275's on 9" stock wheels...but not sure why a spacer was needed on the R/T

A Guy
 

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I think A Guy is right, you should'nt need spacers with 275's on the front with 9 inch wheels. I know countless others run that setup here on the forum. I'm sure someone will chime in here.
 

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I'm running aftermarket Demon rims, 20mm offset. They fit but really tight, so I had the tech install the spacers for safety sake.
 

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Tons of folks here running 275/40's on their SP's. No issues.
 

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Or with Dynamics Package.

Sent from my SM-N960U using Tapatalk
Slidd, you beat me to that post.

To clarify, the 2015 and up SRT 392's, narrow body Hellcats & Redeyes, T/A 392's, 1320's, and any SP equipped w/Dynamics Package, ALL run a 9.5 inch wide rim w/275s both front and rear.
 

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Wow, I didn’t think 275’s would work on a 9” wheel. I just ordered s single centerline 635B in 20x9 for my 2018 Scatpack Shaker, to make sure it fits before buying the rest. 275’s would be pretty nice...
 

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Hi everyone, I have a 2019 scat pack shaker with 245/45/20 Goodyear tires from the factory. I wanted to ask what is the biggest size I can go without compromising ride comfort. Thanks!
you can run any 275/40 tire with the Scat Pack wheels which are 20 x 9" by default. if you have the Dynamics Pkg option it swaps 6 piston brakes and 20 x 9.5" wheels [not in your case].

the difference size maintains the same sidewall height / outside diameter as your OEM 245/45's...

the biggest factor is sidewall stiffness - varies by make / model of tire

some are stiffer than others, and couple that with the firm suspension / shocks that Scat Pack models have whether its SP R/T, SP Shaker, or T/A 392 model
 
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