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View Full Version : 5ht gen wheel scrub/bump stops



gen5
02-26-2005, 06:39 PM
I was wondering how some of you guys manage to run 17s under your 5th gen. I've got 16s with 205/55 rubber and every decent sized dip causes my tires to scrub the wheel well palstic in side. I'm at stock height with some Gabriel replacement struts that only have about 10,000-12,000 miles on them, don't remember exactly.

The other question I had is, when I did all my struts, for some reason, I forgot to put the bump stops back in on every single one :slap: I never hit anything big enough to bottom out the struts, so is there any other reason to have these in? I'm just too lazy to pull it all back apart and put them back in.

gen5
02-27-2005, 05:19 AM
:bump:

ocb_dave_ocb
02-27-2005, 05:39 AM
Its the size of the tires, and the dementions of the wheels.. I fit my 17's with 215/45ZR17...

tim93coupe
02-27-2005, 06:00 AM
dunno much about the bumpstops really, but i'm sure toyota put them there for a reason. might be a good idea to stick them suckers back in, eh? ;p

MoralWarfare
02-27-2005, 02:36 PM
your tires are way too big.

gen5
02-27-2005, 03:02 PM
Okay, use the calculator below, enter my tires and ocb dave's above, and you will see they are almost exactly the same size overall.
http://www.miata.net/garage/tirecalc.html

So what else could it be?

ocb_dave_ocb
02-27-2005, 03:31 PM
Man i dunno because our tires are about the same size

Galcobar
02-28-2005, 12:30 AM
Hmph, the calculations I've run to match plus-sized wheels to stock overall diametre (23.46") come up with:

185/65R14
195/55R15
205/45R16
205/40R17

I know one guy is running a 215/40R17 with a three-inch drop, so I find myself wondering what kind of condition your springs are in. Mind you, your current combination has a 24.87" total diametre -- almost an inch and a half too large. That's a lot of extra material for your suspension to be trying to handle.

SilverCel
02-28-2005, 01:04 AM
OCB has the wrong sized tires on too....was gonna say but im too late


i'm running 215/40/17

Adrian Avgerinos
02-28-2005, 05:55 PM
Your tires are too tall. Chances are the tires are hitting before the bump stops would hit anyway, but it is still not a good idea to install struts without those rubber dampers. The bump stops are in place to avoid damaging the struts when they bottom out.

ocb_dave_ocb
02-28-2005, 08:33 PM
My tires do NOT rub, They are the right size for my wheels.. If i had the 205's then my tires would barely have any side wall.... My stock size was 205/55/15 which is the same diameter as my 215/45/17....When you take into consideration the width of my wheels....... Just to let you know..Im a nursing student so ya might think I dont know anything.. HOWEVER.... i work in a TIRE shop.....

Galcobar
02-28-2005, 09:27 PM
205/55 on a 15 = 23.87" total diametre. 215/45 on a 17 = 24.61" total diametre. They are not the same size. They aren't even within the 3% guideline for matching overall diametre.

And the whole point of upsizing the wheel is to go for a lower-profile tire with a smaller sidewall.

ocb_dave_ocb
02-28-2005, 10:53 PM
actually if you want to be technical...205/55/15 = 23.9" and 215/45/17 = 24.6... So my bad... My tire is 3/4 of an inch bigger than STOCK......OH YEAH.... I would rather have a little side wall... Because when i had 205/40/17's on my car.. There was about 1 and 3/4 of an inch side wall.. I cant help that i dont want to bust my tire if i hit a pot hole

Adrian Avgerinos
02-28-2005, 11:25 PM
My tires do NOT rub, They are the right size for my wheels.. If i had the 205's then my tires would barely have any side wall.... My stock size was 205/55/15 which is the same diameter as my 215/45/17....When you take into consideration the width of my wheels....... Just to let you know..Im a nursing student so ya might think I dont know anything.. HOWEVER.... i work in a TIRE shop.....

Working in a tire shop does not give you credibility. I worked in one as well, and know some of the boneheads that a tire shop will hire. Stick with the nursing student angle.