18" or 20" inch Wheels. - Page 4 - Ford Truck Enthusiasts Forums

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18" or 20" inch Wheels.

  #46  
Old 02-18-2012, 03:39 PM
rlm328
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Originally Posted by ljutic ss View Post
Price the 18" tires, then the 20's limited number of manufactures making 20" tires. I'll be needing a set of 20" this summer $1,400
When you do, check their load carrying capacity. That is usually the trade off in the larger rims, lower overall strength for a larger rim.
 
  #47  
Old 02-20-2012, 07:16 PM
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https://www.fleet.ford.com/truckbbas...Pickups_SB.pdf

Page 81 of document at above link has factory tire load ratings and factory wheel load ratings. Full specifications for rims and tires.

Below is summary of SRW ratings:

LT245/75Rx17 3195 lbs.
LT245/75Rx17 3195
LT265/70Rx17 3195
LT275/65Rx18 3415
LT275/70Rx18 3640
LT275/65Rx20 3750

17" x 7.5" J 3195 lbs.
18" x 8.0" J 3590
20" x 8.0" J 3590

Max Rear Axle Rating (ignoring springs, etc.; raw axle rating)
F250: 6200 lbs.
F350: 7280 lbs. (srw)

For 20" the tires will be the limiting factor; not the rims or axle as 2*3590=7180 lbs if for F-350; but the axle will be the limiting factor for the F250. (Ignoring other ratings by Ford for the load carrying capacity.)

Bob
 
  #48  
Old 02-20-2012, 08:55 PM
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20 inch

i have 2012 king ranch fully loaded with 3.55 with lockers and traction control ,hill assist at 70 mph i get 23.4 on flat land and 13.5 will towning a 38 foot trailer
 
  #49  
Old 02-21-2012, 12:06 AM
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20 inch

the only way to go is 20 love 3.55 mpgs
 
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