Do 20's affect performance. I am about performance first then looks. If 20's are going to hurt then I will stick to 17's. Anyone know?

 

It all depends on what size tires you use and the overall difference in diameter from your stock tires. Performance is affected if you go larger than stock.

 

i would imagine that the extra weight that youre gaining from switching form 17" to 20" is gonna affect performance also. If performance is your main goal, why not go with 18"? they look great in lightnings and they wont affect performance as much as 20's. just a thought, good luck!

 

I switched to 20's about 2 months ago and noticed no loss of performance engine wise. I'm running Goodyear GTII 275/45/20 which is about half inch shorter than the stock 255/70/16. The wider tires do make peeling out a little tougher to do. But my handling has improved thanks to the Belltech 3/4 drop that went on 2 days before the 20's were mounted. As for the weight of the wheels issue, my wheels are billet aluminum which are lighter than the chromed steel counterparts. But in the looks departmnet there is no comparison! 18's are kinda small and 22's are a little too big and pricey but 20's look just right!

 

hey 99flareside,
i noticed u had boyd cottington wheels, got any pics of them? those are some nice rims, just curious how they look on F-150's.

 

I need to take some updated pics, but these will do for now





Some more can be found here: http://www.f150world.com/99flareside/

 

Performance handling wise, for the most part, the larger the rim, the better the handling. This is mostly due to that your ride will be stiffer and more importantly, it'll force you to use lo-profile tires, wich will handle better.

Engine wise, it's all the same. It depends on the total diameter of rim+tire. The larger you go, the less torque you have, the less accel you have and visa virsa. I would love to have a nice 285/60/18 or 20 on my truck, a nice balance of handling, comfort and looks. Too bad my set-up would be over $2500!

 

I was wanting to know if I went to 20's is that going to slow me down on the street/track?

 

find out how much the 20's you want weigh, then how much the tires you would get weigh. and compare that to the weight of the wheels and tires you have now. because some wheels weigh alot more than others. for example stock alloy c5 rims weigh around 20-25 pounds while the upgrade magnesium wheels weigh les than 8 pounds. so obvisously performance wise tha c5 with the lighter wheels would be faster.

 

I am happy with the performance of my stock 20" rims on my Harley F150. Ford dropped the front end 1". Performance and handling are great! I have the GY Eaglet GTII 275/45/20.
I do want to go up in size to a 285/50/20 or 305/50/20 for more rim protection.

 

I would assume that 20's would help performance because you would have better grip tires. I get lots of wheel spin on my stock tires, and if I had better grip it'd help my starts alot better.