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post #1 of 10 Old 03-09-2008, 08:25 PM Thread Starter
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decrease turning radius by reducing wheel size?

hey everyone,

im looking to decrease the turning radius of my car in order to gain better maneuvering. ill probably be moving to new york city soon and would definitely be able to take advantage of a lower turning radius in the city streets and small parking lots.

the easiest way i can see myself reducing the turning radius is by reducing the wheel size to 16" and using the 205/60/16 tire size used on the 4 cylinder ex models. would reducing the rim size adversely affect the VSA and traction control systems on my car?

i know i'll probably get slightly worse handling, but a grippy all-season should help out with that. if anyone has any ideas or suggestions regarding reducing the turning radius, that would be really appreciated. the turning radius right now is alright, but it definitely leaves me asking for more, especially at tight intersections.

thanks in advance for any help.


'07 NBP Accord EX-L V6 w/Navi- Mods - Accessories (Splash Guards, Wheel Locks, OEM fog lights, OEM door & moonroof visors, Decklid Spoiler, All season mats, Cassette Deck, Door Edge Guards), Polk Audio DB691 6x9 speakers

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post #2 of 10 Old 03-09-2008, 08:33 PM
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On all accords, the overall wheel/tire diameter is the same - regardless of whether there's a 15, 16 or 17 inch wheel on the car. As such, changing to a different size in that regard won't change the turning radius. Even if you dropped the tire size down a bit, it wouldn't impact much of a change that you'd notice. If you went with a narrower tire you MIGHT see a bit better grip on a tight corner (i.e. less wheel scrub), so the effective turning radius might improve a bit - but again nothing to really write home about. Perhaps the bigger thing improved by going to a smaller wheel (with more meat on the tire) is less of an issue with curb rashes or bent rims when going over potholes, etc - a more forgiving setup in a city.

andy

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post #3 of 10 Old 03-09-2008, 08:56 PM Thread Starter
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thanks for the fast reply. i agree that reducing to a 16" wheel will definitely reduce the chance of curb rash, especially in parallel parking, and pothole damage.

i've been looking through the 16" wheels at tirerack.com and found a nice, cheap set.

take a look


the whole package with tires comes out to about $750 with shipping depending on tire choice. i chose the bridgestone potenza g009 tires with these wheels and that brought the total price to $756.

is there a difference in the steering setup that allows the 4-cylinder accords to have a better turning circle versus the 6-cylinder? i doubt that it would be different because of manufacturing costs. i probably should have bought the 4-cylinder model, but the extras that come with the v6 were just too good to pass on. anyways, i maybe will have to reconsider downgrading the rim size since it probably wont do much good for the turning circle.

'07 NBP Accord EX-L V6 w/Navi- Mods - Accessories (Splash Guards, Wheel Locks, OEM fog lights, OEM door & moonroof visors, Decklid Spoiler, All season mats, Cassette Deck, Door Edge Guards), Polk Audio DB691 6x9 speakers

Coming Soon - 35% tint front and back, HFP gunmetal grey 17" wheels
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post #4 of 10 Old 03-09-2008, 09:08 PM
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width?

Im far from a expert here, but does the 205 vs 215 explain the tighter turning radius?

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post #5 of 10 Old 03-09-2008, 09:15 PM Thread Starter
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Originally Posted by lpaudio2 View Post
Im far from a expert here, but does the 205 vs 215 explain the tighter turning radius?
its funny you mention that. i read an article by consumer reports on the 07 accord v6. they mention a con of this model being the wide turning radius. they blamed it on the 17" wheels added to v6 for the MMC of the 7th gen accord.

i wonder if the 1" decrease and thinner tire really makes all the difference in the turning circle. i guess i'll find out for myself if i end up getting the 16" on my car.

'07 NBP Accord EX-L V6 w/Navi- Mods - Accessories (Splash Guards, Wheel Locks, OEM fog lights, OEM door & moonroof visors, Decklid Spoiler, All season mats, Cassette Deck, Door Edge Guards), Polk Audio DB691 6x9 speakers

Coming Soon - 35% tint front and back, HFP gunmetal grey 17" wheels
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post #6 of 10 Old 03-10-2008, 08:29 AM
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Im really curious what you find out. Tirerack has some OK looking rims for $100ea...

Also it might be worth seeing if you can snag 16"s from a 08 owner that upgrading.. I think someone upgraded recently actually here.

The manual does have a warning about size and VSA for whatever that is worth...

THe other advantage of 16"s is lighter steering since you are fighting less tire surface area.

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post #7 of 10 Old 03-19-2008, 08:37 AM
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I would bet the turning radius is impacted by where the manufacturer put the lock to lock stops, and maybe they did change it when they needed to keep larger/wider tires from hitting.

Smaller diameter tires is not going to help with turning circle though. Leave it alone.

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post #8 of 10 Old 03-19-2008, 09:32 AM
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What I've found through the years in owning various cars with different width and construction of tires - and even moving from wide to narrow on the same car - that the wheel width or diameter doesn't change the turning geometry of the car. What does change is the effect of the tire contacting the road, especially on a slow-speed turn (like a u-turn). Narrower tires typically have a taller sidewall, and can take the flex of a turn and allow the tire to track pretty consistently with the geometry of the wheel/suspension setup. With a wider tire that has less sidewall give, the tire will tend to scrub on the road, and (for lack of a better term) slide a bit as it goes around the corner, resulting in an actual turning radius slightly larger than it would be on paper. You can really tell this if you've ever tried to do a u-turn inside a cement parking structure - wider tires will tend to want to slide out whereas narrower tires will tend to track a bit tighter.

anyhow, if you're goal is a more supple ride and better slow-speed turning response, the narrower TIRE will likely help, mostly because the sidewall will have more flex for the tread to manipulate the bumps and the corners. But you'll likely lose high-speed handling characteristics when you go this direction, which is where wider tires have a distinct advantage.

andy
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post #9 of 10 Old 03-19-2008, 09:54 AM Thread Starter
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thanks everyone for all your constructive input on turning radius.

i have decided not to downgrade the wheels since it probably wont have any effect on the turning radius. ill probably end up selling the car or just keep it as an alternate means of transport whenever i move back to nyc.

i do agree with that fact that a thinner tire may end up reducing high speed handling characteristics. im not an aggressive driver, but i've had to perform last second maneuvers with my car to avoid accidents with others. the car handles just fine stock and i really don't want to compromise high speed handling so i'll stick to what i have now and live with the turning radius since i don't really have a hard time with parking at all or perform u-turns on a daily basis.

anyways, i really appreciate everyone's input on this topic.

'07 NBP Accord EX-L V6 w/Navi- Mods - Accessories (Splash Guards, Wheel Locks, OEM fog lights, OEM door & moonroof visors, Decklid Spoiler, All season mats, Cassette Deck, Door Edge Guards), Polk Audio DB691 6x9 speakers

Coming Soon - 35% tint front and back, HFP gunmetal grey 17" wheels
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post #10 of 10 Old 10-19-2017, 12:30 AM
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I took stock wheels off my 2000 accord (15s with large tires) and put on 16x7 wheels with 205 tires. The car sat quite a bit closer to the ground without any adjustment to the suspension and I was surprised to notice the turning radius was considerably tighter, something I never expected.
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