245/75/16 vs 265/70/17 Towing - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 05-29-2011, 09:35 AM   #1 (permalink)
03YUKONXL
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245/75/16 vs 265/70/17 Towing

4:10 Gears 8.1L went from stock tires and rims to 2009 tires and rims off of an duramax equip. truck,should i switch back to the stock rims and tires for towing this summer or will it make no differance in power and mpg's?taller tires dropped rpm's a little empty at hwy speed.Thank You.
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Old 05-29-2011, 12:21 PM   #2 (permalink)
Seann
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I did something similar with my DuraMax no ill effects at all towing.. So far I have done 2- 4000 mile round trips snowbirding and numerous trips to the mountains.
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Old 05-29-2011, 02:19 PM   #3 (permalink)
03YUKONXL
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I did take it for a short test ride on the hwy. with the trailer, the dic stated 8mpg both instant and average thats normal for it. pulled the same just maybe a sluggish on the on ramp and transmission did not seem to hunt on the over passes.
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2003 yukonxl 2500 4x4
8.1L.4l85E G80 rear
265-75-17 firestone transforce
FLOW MASTER 70 MUFFLER SINGLE 3 1/2 EXHAUST
SUPERCHIPED
K&N COLD AIR INTAKE
PLUG MOD. 180 DEG THER. MOD.
REAR AIR BAGS RIDE RITE 2000LB CAP.
BUMPED UP FUEL REG.
WESTEN BRUSH/PUSH BAR W K.C. DRIVING LAMPS
REESE TOW BEAST HITCH
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Old 05-29-2011, 08:44 PM   #4 (permalink)
Jaybeecon
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When I had my 8.1 (3.73) I did not notice any difference when I switched from 245/16's to 285/16's.
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Old 06-09-2011, 04:29 PM   #5 (permalink)
nekkidhillbilly
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i have 265s from 245s no difference really

i do have aftermarket rims
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