What effect does a larger tire have on performance?
#1
What effect does a larger tire have on performance?
I am putting Rickson 19.5 Wheels on my '04 350 CC short bed, SRW 6.0. I don't know whether to go with the 225 R70 19.5 (G)or the 245's. The 245's are about 2" larger than stock 265 r70 16 (e). I was wondering what the difference in performance would be with the larger tires. Any other issues? I carry a truck camper that maxes out the rear axel and stock (e) tires (6800 lbs). I an looking for a better margin of safety over the stock tires by going with the 19.5"s. Thank you.
#2
norwhaler,
Basically for every inch you increase tire diameter without chaning gearing you lose about 6-8% of your efficiency and torque at the rear wheels. So you would give up about 12-16% of your performance/towing capacity you have now.
Here is a link to a thread that discusses how to determine what new ring gears you would need to maintain your same performance levels.
http://www.ford-trucks.com/forums/sh...hreadid=203050
Also do a search for 19.5'" rims and tires on this site as there have been past discussions on these. For the increased safety you want a higher load weight rating per tire would give it to you.
Hope this helps
Basically for every inch you increase tire diameter without chaning gearing you lose about 6-8% of your efficiency and torque at the rear wheels. So you would give up about 12-16% of your performance/towing capacity you have now.
Here is a link to a thread that discusses how to determine what new ring gears you would need to maintain your same performance levels.
http://www.ford-trucks.com/forums/sh...hreadid=203050
Also do a search for 19.5'" rims and tires on this site as there have been past discussions on these. For the increased safety you want a higher load weight rating per tire would give it to you.
Hope this helps
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