When you go bigger, does it affect power or performance, or are these close enough there is no real effect in that department?
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2007 GMC Sierra Classic Duramax LBZ
MBRP Cat Back 4" Stainless Exhaust S&B Air Intake Edge Juice with Attitude
Chrome Brush Guard, Cab Visor and Running Lights Line-X Bed Liner Coginto Leveling kit from Nor Cal Trucks with 1" Rear Lift Blocks Bilstien Shocks Nitto Terra Grapplers 285 75 16 E's - Nitto's are here and don't they look AWESOME!
Stock height and stock rims> Anyone know? It looks like it would hit the inner fender pretty easily on my 08'.
__________________ 2008 GMC 2500, LTZ, 4" MBRP downpipe back, Stealth 2 @ 135, AFE 7, EGR blocked, Redline water wetter, husky mats and rear under seat storage. I tow my grove tractor with it, 15,000+ with mower & front loader, and 25' trailer. 23 MPG (DIC) at 60 MPH cruise, when empty
Mods coming soon (>10 days) Suncoast torque convertor and a Transgo JR shift kit before I slip the trans, Fass 150, HOPING to see 25 MPG on the DIC.
Future Mods, Suncoast trans, turbo & intercooler.
Mike Milliken, Forester, Boyett Land & Timber: 863-439-8224
I am going to level the truck.. either the ReadyLift or Cognito.. so I don't think space will come in to play.. Also planning on the stock rims.
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2007 GMC Sierra Classic Duramax LBZ
MBRP Cat Back 4" Stainless Exhaust S&B Air Intake Edge Juice with Attitude
Chrome Brush Guard, Cab Visor and Running Lights Line-X Bed Liner Coginto Leveling kit from Nor Cal Trucks with 1" Rear Lift Blocks Bilstien Shocks Nitto Terra Grapplers 285 75 16 E's - Nitto's are here and don't they look AWESOME!
I have my bars cranked up some (just raised the from about an inch to an inch and a half) and I was planning on putting some 285's on 18's. From all the threads I've read, it should be fine with no trimming. I haven't done it yet though (lack of dough). : (
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2008 Silverado 2500HD LTZ
6.6L Diesel (LMM), CrewCab, Shortbed Z71
4" MBRP Exhaust with 5" tip (DPF deleted & EGR blocked), Quadzilla Stealth 2, Autometer Cobalt Boost and EGT gauges on the pillar, Cognito leveling kit with BFG A/T 285's on XD Series 18's, 15% window tint with vent visors, TruckChamp black bars, Extang Tonneau cover.....
and more to come hopefully..... like tow mirrors, Line-X bedliner, and a CAI...
I have the Readylift keys an 285's have zero problems take it the woods hunting with pretty good flex at times and tight turns and have never had an issue. oh and I am using the stock rims.
__________________ 2005 LLY CCSB
Leather, Bose, XM
Truxedo bed cover, Line-X
305/75/16 BFG M/T's Ready Lift Leveling kit
B&W Turn-over-ball
Resonator plugged
NO CAT!!!!
Superchips Flashpaq (It was free and now I know why what a P.O.S.)
BG Synthetic fluids throughout!
When you go bigger, does it affect power or performance, or are these close enough there is no real effect in that department?
I had 285 then wore them out went to 265's sold them andwent back to 285 for looks.
Personally, there is little performance difference betweent he two. But, the 265 gets about 1-2 mpg better mileage than the 285 does. I dont drive mine all the time so I was ok with the loss. If you drive it everyday and want to save fuel the 265 is where you want to go.
Quote:
Originally Posted by Crankrod
Stock height and stock rims> Anyone know? It looks like it would hit the inner fender pretty easily on my 08'.
The 07.5+ trucks have a closer bumper than the older ones. Also the whol bumper is metal and cant be trimmed like the old body style. I know I had to crank the t bars and do some trimming to get my 285's to fit on my truck.
__________________ Jason 2006 Silverado 2500HD LBZ CC SB Escalade Handles, Front windows tinted to match the rear, painted bumpers, billet grille 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges MBRP Turbo Back Stainless Exhaust (Straight piped), w/ stainless tip! PPE Hot+2 285/75/16 Nitto Terra Grapplers on Gear Alloy wheels ****Lost Kitty Reward if found!!**** 1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
I have the Truxxx leveling kit 3+1 with 285's on 16's. I have minimum rubbing (when backing up and turning) with the torsion bars cranked to 2 inches of the 3 available. Trimming 1/2" off the rear fenderwell helps.
I still have gotten about 20.5mpg on the highway with this setup, but the in-town mileage has dropped to 15.5-16.5mpg.
Personally, there is little performance difference betweent he two. But, the 265 gets about 1-2 mpg better mileage than the 285 does. I dont drive mine all the time so I was ok with the loss. If you drive it everyday and want to save fuel the 265 is where you want to go.
Strange, why would the smaller tire give less milage, would think it the opposite.. larger tire, more distance per turn of the hub...
MBRP Cat Back 4" Stainless Exhaust S&B Air Intake Edge Juice with Attitude
Chrome Brush Guard, Cab Visor and Running Lights Line-X Bed Liner Coginto Leveling kit from Nor Cal Trucks with 1" Rear Lift Blocks Bilstien Shocks Nitto Terra Grapplers 285 75 16 E's - Nitto's are here and don't they look AWESOME!
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