Duramax Lifetime Supporter
Join Date: Feb 2017
Location: Spanish Springs NV
I just put 4.30’s in my truck last week, and run a tire that is 34.5”, I think they are just right for 34-35” tire. I have changed the gearing on my last couple of trucks and felt the difference that it makes. I wouldn’t hesitate to run 4.56’s on a 35-37” tire. 4.56’s and 37’s will give you quite a bit of leverage back and still drive on the highway comfortably and keep you in the sweet spot for the rpm’s.
2016 2500hd Custom Sport, Z71, LTZ
Leveled with Moto 961's and 295/70\18 Ridge Grapplers,Amp steps, Weathertech mats, Extang Encore,S&B dry,
Wehrli intake bridge and AFE IC piping,Edge Insight cts2, AirDog II 165,SDP resonator delete, Mishimoto pcv catch can, MBRP down pipe,Recon led tail lights and third brake light, Morimoto mini D2S 5.0 projectors w/hid’s, Morimoto 2stroke 2.0 led’s highs and fogs.
Kryptonite uca’s & tie rod sleeves, CCM diff drop,Fox 2.0 reservoirs, steering stabilizer, CalTracs,
Cognito PISK and heavy duty sway bar links, AirLift bags,
Nitro 4.30’s w/Nitro TracRite posi...