I have an '04 Cab NB, which presently has 18''X10'' (65MM offset) with 285/30. Im thinking about putting 19''X10'' (47MM offset) with 285/30 19. Would this stick out too far?

Thanks

 

Here ya go:

Wheels:Wheel 1Wheel 2Wheel size18x10 ET 6519x10 ET 47BackSpace204 mm (8'')186 mm (7.3'')
18 mm (0.7'') shorter.Rim Lip18 mm (0.7'') widerTires:Tire 1Tire 2Tire size285/30-18285/30-19Section width285 mm (11.2'')285 mm (11.2'')Sidewall86 mm (3.4'')86 mm (3.4'')Tire diameter629 mm (24.8'')655 mm (25.8'')
26 mm (4.1%) taller.Rim sizes18x9 to 18x10.519x9 to 19x10.5Circumference1975 mm (77.8'')2057 mm (81'')Revs per mile814.8782.5SpeedometerAssuming that this is OEM tire and speedometer readings are correct When speedometer reads 60mph (96.6km/h) actual speed will be 62.5mph (100.6km/h): 4.2% faster.Clearance:Package 1Package 2SuspensionAssuming that this is OEM wheel/tire and there is no any problems with clearance on both sides 100% clear (leaves even more room than OEM) FendersPackage will stick out 18 mm (0.7'') farther. Make sure that you have enough room under the fender. If not, consider narrower tires or higher offset. WheelwellsWill fill out the wheelwell by extra 13 mm. Make sure that you have enough room under the fender. If not, consider lower profiles or smaller rims.

 

I think that offset is too low and a 285/30R19 is too tall.

 

Thanks.

It would be about 3/4'' beyond where my 285/30 18'' presently are, which would be right on the edge of the fender well. I think im going to go with 265/30 19''

 

You can use this calculator to see where you stand:

http://www.rims-n-tires.com/rt_specs.jsp

 

Ideally, you'd use a 305/25R19 - but they are rare. Dropping to the 265 gives up a good bit of width. Consider a 275/30 or if you have the option, test fit a 315/25. You may want a 10.5" for the 305-315 size.

I like that calculator from Brando. It is a good guideline, but doesn't replace a test fit.

 

285/30/19 is a bit tall but within the 4% error rule of thumb.... idealy you want 25"... since thats how these cars were designed for. For 19" you want 11" running 305/25 or 315/25.

Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
235/35-19 3.2in 12.7in 25.5in 80.0in 792 0.0%
285/30-19 3.4in 12.9in 25.7in 80.8in 784 1.0%

 

I run a 10" 42et in the 285 rear right now. Perfectly flush. The tire might be too tall(overall diameter) as other posters stated.