Tire Sizes that are OK to use...

[thisisdudewhoru]

I'm thinking of ordering Konig Daylights 17x7. I was wondering if a little wider tire would fit. I'm thinking the Falken Azenis Rt615 225/40/17? Think I would rub any? btw I have a sedan.

[Piotrush]

Originally Posted by thisisdudewhoru

I'm thinking of ordering Konig Daylights 17x7. I was wondering if a little wider tire would fit. I'm thinking the Falken Azenis Rt615 225/40/17? Think I would rub any? btw I have a sedan.

I'm sure it will be fine, but I would put in on a 7.5" wide wheel, you'll get better steering response and more contact patch.

[JCool]

Originally Posted by JCool

well long story short I want to put Si brakes on my EX and would like to know if the wheels would have enough clearance. I have 17" for the summer, no problem but in the winter i go back to stock.

so no one knows?

[waterboy1966]

i jus bought a 2008 coup it came with kobe rims and the tire size on them is 235 45 17s very wide

[reddev1l]

I just tried over the last weekend to push a set of 235/55 17 onto the SI rims and there was major rubbing and touching on the inner fronts.
It's a shame since it was a nice set of Pzero Neros.

Back to the drawing board I go.

[vingavina]

225 40 18, the best for 18" HFP wheel?

[odalV]

will the car accelerate slower with 18s? cuz i want 18s but ppl tell it will be slower..

[JCool]

not if the weight stays the same, witch would mean you will have to spend more money to make that happen. HINT there is a thread about wheel weight and what stock is, that should help.

[vingavina]

is running 215/40/18 good on 18" HFP rims

[The1SloR/T]

can a 06 civic EX run 225/50/16's on stock wheels and stock suspension without rubbing?
Website says

Package is 10 mm (0.4'') closer to suspension/brakes components. Acceptable for most cars.

and that doesnt seem like much at all... we are considering this size for my girlfriend's car and want to make sure if anyone has personally tried them.
PM or let me know by on here. thanks!

[therra978]

I picked up these wheels for a good deal 17x8 +25MM planning to go 225/45/17 or 235/45/17 with a Tein S. Tech Drop.

Well i run into any problems?

[RCHamel3]

my stock size is 205/55/16...If I use the plus 2 sizing formula, im lookin at 225/35/18. Is this a good size to use? I see most people with 18's run on 225/40/18 but according to the plus 2 sizing it would be 35. anyone have suggestions? Also, is it possible to use 235?

[RCHamel3]

anyone??

[harobmx87]

is anybody else rubbing on 18x7.5 +42 offset?
i just got my wheels last night with falken 225/40's and i hit a dip today and heard a slight scrape and im not even dropped yet.
when i got to my gf's house i checked out the passenger side which is where i heard it from, and the pop-rivet at the very top was slightly worn down.
maybe i just hit too hard?

[Johnold]

how about 225/45/17 size tires on 17x7 45mm offset size wheels?. I like the OEM Si stock wheel specs but I'd like to use that size tire....ok to use?

What about the the HFP drop aswell....rubbing?

[dave1surf]

Originally Posted by odalV

will the car accelerate slower with 18s? cuz i want 18s but ppl tell it will be slower..

yes, weight is an issue.. however other factors play a role.

Consider this; equal weigh wheels with the same weight (mass). The 18 will have a larger diameter. so more of it's mass is positioned at a further distance from the rotation point. This increases it's Moment of Inertia. Therefore more Angular Momentum (Torque) is needed to accelerate the larger wheel.

So a larger wheel with the same weight and tire, will accelerate slower when given the same torque.

That being said, a larger tire can usuall accommodate wider tires...

[Survivor]

Originally Posted by dave1surf

yes, weight is an issue.. however other factors play a role.

Consider this; equal weigh wheels with the same weight (mass). The 18 will have a larger diameter. so more of it's mass is positioned at a further distance from the rotation point. This increases it's Moment of Inertia. Therefore more Angular Momentum (Torque) is needed to accelerate the larger wheel.

So a larger wheel with the same weight and tire, will accelerate slower when given the same torque.

That being said, a larger tire can usuall accommodate wider tires...

The spec the tire manufacturor gives for the heigth of the tire used; is the factor to consider when speculating your theory, "Consider this; equal weigh wheels with the same weight (mass). The 18 will have a larger diameter. so more of it's mass is positioned at a further distance from the rotation point. This increases it's Moment of Inertia. Therefore more Angular Momentum (Torque) is needed to accelerate the larger wheel.".

[dave1surf]

quote: "The spec the tire manufacturor gives for the heigth of the tire used; is the factor to consider when speculating your theory"

That's right. I've seen a few post where people talk about sizes and weights, and i thought i'd chime in with another perspective. Of course the amount of weight needs to be minimumized. We all know more force is needed to accelerate a larger amount of mass. However when it comes to wheels, there is more involved than just lowering the amount of weight you want to get to 60mph or 1/4 mile.

Think of a bike tire. Almost all of it's weight is on its outer circumference. For it's weight, it requites a large amount of torque to get it rotating. An ideal wheel would have the max amount of it's weight near it's center of rotation therefore minumizing the effects of rotational inertia.

Also interesting to consider is that this applies to stopping the car aswell.
Two sets of rims, same weight. The larger (bigger diameter) will require more breaking power to stop.

[Survivor]

Quote,"Also interesting to consider is that this applies to stopping the car aswell.
Two sets of rims, same weight. The larger (bigger diameter) will require more braking(typo repaired) power to stop."


True. Yup! Also on top of that, generally the "(bigger diameter)" will also weigh more netting parasitic drains.

It comes down to balance, intended use and ones budget.

Look at a top fuel car. The tires are really wide at launch giving it the area needed for traction. As the car is rocketed down the track the tires grow taller giving it in a sence a lower gear for top end mileage. Some may say higher gear--whatever, you know what I mean. Its an example of intended use. These tires would be just a little too bouncy for day to day commuting lol.

[dave1surf]

Thanks for the typo repair! I generally need these quite often.