I'll be putting 20 inch Chevy SS Chrome Replica wheels with 275/45/20 tires on tomorrow and I was wondering how much overall HP/TQ/1/4 time loss I should expect with these vs. stockers?..

 

Dude,

I had the silverado ss 20's on my truck and it took so much performance away I sold them 2 days later. They looked great don't get me wrong, but I'll give up some looks for some more GO

 

That's why I bought mine with the 20's so I'd never know the difference!

 

Ahh, please don't tell me that..I'll be adding a HPIII later tomorrow night(nothing special, but I didn't feel like mail ordering a great tune) and my goal is just to be a tad bit quicker with this combination rather than without it..

Mjhoward, that is the best way to do it I guess..

 

I would recommend getting some nice 17s and wider tires, or 18s for a better look. IMO anything larger than that is a waste of money unless you've got enough power that it really doesn't matter.

 

You will feel a difference from the increased weight and increased rotational mass. I don't know how much the 20" replicas weigh but the factory 20" SS wheels weigh 38 lbs. Compare this to the factory 16" aluminum wheel which weighs approx. 23 lbs. If you are concerned about acceleration you made a good choice on the tire size. The 275/45-20 tire is approx. 29.7" in diameter, which is identical to the stock 16" tires. If I were you, I'd roll the 20's when you want to show off and roll the 16's when you want to race.

 

Good answer!

 

I just took my 20's off for the winter. With the 20's I could accelerate up to 84 mph from a light to a sign that is about 1/4 mile away. With the stock it goes up to 91 mph. My 20's are a little bigger than yours at 305/50/20

 

Wait...you guys are saying bigger rims/tires slow you down? LOL!

 

dur?