Tire ?

[93 Fo SHO]

Would a 225/50/16 fit on my SHO without rubbing?

 

[justinrsho]

YEP~!

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98 SHO
Black/Tan
20,000 miles
Only seen rain 5 times now~!

Its For Sale I would like to sell it before the winter. You can
e-mail me if you have any questions.

 

[sdpatt]

Yes, but a 225/55-16 would be much closer to the correct overall diameter to keep the speedometer accurate. The 225/50-16 size is about 5% shorter than stock and will cause you speedo to read 63 mph at a true 60 mph.

------------------
Scott

1991, 252K miles, glass hood, police grill, SVO shifter, Catz fogs,
K&N, 73mm MAF, Superchip, PP Y-pipe, Borla cat-back, 190 lph pump
Eibach/Tokico/polyurethane, SHO Shop front & rear strut braces,
16x7.5" Moda R1, 225/55ZR16 Bridgestone RE730, -1 deg camber x 4,
Class II hitch, Silver award at the SHOklahoma Car Show

[This message has been edited by sdpatt (edited 10-30-2001).]

 

[TwiceSHOwn]

what will a 225 60 r16 do?

 

[sdpatt]

Why not the 225/55-16 size? It is the closest to stock. The 225/60-16 is too large looks like a truck tire. It has a large amount of sidewall to flex. I had some front fender rubbing when I used a set that size.

Scott

 

[SHOmuchFUN]

Correct me if I'm wrong, but isn't the stock tire size 215/60/R16? THAT would be the closest to speedometer reading

------------------
Erik Engstrom
1995 ATX SHO

Eibach Springs/KYB struts
17" TSW REVOs
TOYO PROXES tires
PIAA 1900X platinum foglights
Pilot Motorsports Stainless mufflers w/
custom bent exhaust.
CUSTOM RACTIVE Superflow Intake
White faced guages
Eclipse/MTX/Audiobahn stereo
"SHODOWN" license plate
15% tint
TAURUS SHO window banner
Few stickers to add 15HP

WWW.NESHOC.com OR
http://SHOmuchFUN.freeservers.com

 

[sdpatt]

Originally posted by SHOmuchFUN:
Correct me if I'm wrong, but isn't the stock tire size 215/60/R16? THAT would be the closest to speedometer reading

Closest to what? The indicated speed with the stock tire size or the real measured time to cover a known distance?

When I mention a non-stock tire's speedometer error, I always reference it to the stock tire's size (215/60-16). However, in many over-the-road tests (on long stretches of flat south Texas highway), I have found that the 225/55-16 size comes within measurement uncertainty of the true vehicle speed. In my measurements, that means that an indicated 60mph is within 0.1mph of the true speed when checked against the time it took to cover a measured distance (10 miles).

I found that the stock tire at full tread depth actually made the speedometer on my car read about 1mph below the true speed. When a 225/50-16 makes a 5% (3mph) difference, 0.1mph is quite insignificant.

I'll remind you that I am an engineer and covering long stretches of flat south Texas highways with very little scenery causes you to look for things to do to keep your mind functioning. Sometimes I calculate my car's speed and check it against the speedometer's indicated reading. **** is as **** does.

Scott


[This message has been edited by sdpatt (edited 10-30-2001).]

 

[AutoXSHO]

Just like the fuel gauges, from year to year the speedometer calibration changes. Apparently the '95 models got some wacky speedo calibrations. Not sure what you have.

I run 225/50 tires and would expect 5% difference (3MPH at 60) from stock. However from the factory my '95's speedo reads 2MPH slow already, so it effectively compensates itself out. I verified that the speedo reads about 1MPH high now via the Penna turnpike's friendly radar readouts, as well as using the mile markers on dead-flat dead-straight I80 between Chicago and Ohio.

Engineers on the road are a danger to society apparently - I should keep my eyes on the road and my brain on idle

.

John V

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95 MTX with mods.