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General Tire/Wheel info:
Tire Calc: http://www.miata.net/garage/tirecalc.html
Alt Tire Calc: http://www.1010tires.com/TireSizeCalculator.asp?action=submit
Tire Info: http://www.discounttiredirect.com/direct/brochure/info/tmpInfoTireMath.jsp
5x115 The 1ST # is the number of lugs. The 2ND is the spacing between the lugs, measuring center point of the lug to the next lug.
Offset is the dist from the center line of the wheel to where the wheel mounts to a hub. a pos offset has the hub/lug toward the outside (away from car) of the wheel and normally found on FWD cars. Neg offset is the opposite
225/55-16 225 is the dist from one edge to the other of the tread patch in mm. 55 is the percent of the first # giving the side wall height. the last # 16 is the dia in inchs of the wheel for the tire.
Following are for 95-99 Lumina & Monte Carlo:
Wheels: all are 5-115mm bolt unless specified
Factory alloy's 95-99 : [16" x 6.5" +40mm ] 35-38 lbs w/ tire
Other Facotry wheels:
Monte's95-99
Lumina91-99
Grand Prix91-96 i know the later spiral ones fit. they were like 97-99
Olds Cutlass supreme 9?-96 ( not sure when they originated i think around 91 92)
Bonneville 5 Spokes fit with a spacer for the front. http://bizio.homeftp.org/geoff/bc/shootlocations/DSC03803s.JPG
Aftermarket:
[Enkie MM2 17" x 7" +38mm] 40 lbs w/ tire http://www.speednstylez.com/images/ENKEI%20MM2%20copy.gif
[Eagly Alloys 077 18x8 +38mm] 30 lbs w/o tire http://www.therimsite.com/gfx/lg/077.jpg
[American Racing Casinos 17X7.5 +45mm] http://www.rimgod.com/images/AR/casino.jpg
[American Racing Estrella 17X7.5 +40 mm] http://www.rimgod.com/images/AR/estrella.jpg
[Fondmetal Tech 4's 18x?] http://www.polstr.ru/products/Shiny/pic/marks/diski/fondmetal/small/tech-4.jpg
Tires run:
225/60-16" Factory Tire
225/55-16" speedo off about 2 mph
225/55-17" no speedo problems near stock dia.
235/55-17" no rubbing +38mm offset tight clearances all around on eibachs
245/40-17" no rubbing speedo correction needed eibach springs
245/45-18" Speedo correct. Near stock dia. No rubbing
245/60-16" Manitcor
235/50-17" very- slight rubbing in near-lock turns in the parking lot.
235/50-18" No rubbing issues. Tires sit very close lower strut plate.
Tire Brands: (Discriptions/ratings for tires are from different members opinions.)
225/55-17 Mastercraft Avenger ES tires, great wet weather performance, low price, good tread life.
245/40-18 Mastercraft Avenger ZHP Good grip, extra body gap then factory, good wear.
225/55-17 Falcon Ziex 512. Good all season. never used in snow. good in rain. some road noise. good dry grip.
225/55-16 & 245/45-17 Yokohama AVS ES 100's Out standing IMO decent tread wear amazing wet & dry traction for a street tire. Quiet tire. not recomended for winter. for the 245/45-17 speedo recalibration was needed.
225/55-16 BFG G-Force Sport Good dry traction, good wet traction, Decent tread wear, quiet
Kuhmo KH-11. Great dry traction, good wet traction with decent hydroplaning resistance. Road noise is minimal, comfort should not be considered when buying these tires.. At 42 psi they're rock hard. Great cornering tire but they wear out too fast because of the soft tread. Too expensive for how long they last.
235/55R17 GoodYear Eagle W-Rated Crappy wet traction, good dry traction. They go bald when heavily used for burnouts
235/40ZR18 Yokahama AVS dB great dry taction, ok wet. quiet when new, then get gradually louder as they wear http://www.1010tires.com/images/tires/yokohama_db_new.jpg
225/60R16 Douglas Performance GT-H good traction and wear life. good cheaper tire
235/50-18 BFG KDWS An inch over stock height. No rubbing issues. Tires sit very close lower strut plate.
_______________________________________________________________
Following are for 6th gens:
Wheels:
05+ Bullitt Wheels. 17x8 +45mm offset. Must use 5/16th'' Spacer in front to clear Brake caliper bracket. Longer studs in front required. Most aftermarket wheel bearings have longer studs then OEM.
Stock 04 SS(S):
[Stock Diamond Cut Al 17" x 6.5"] offest?
Aftermarket:
[Fittipaldi Force 17x8] will rub on a lowered 6th gen
[Eagle 185 17x8] rims also cause the same problem.
[Vault wheels 17x7 +40 ] http://i6.photobucket.com/albums/y247/PacerSS/Rebuild/100_0290.jpg
[Volt Racing 175 17X7.5 +45mm] (http://i6.photobucket.com/albums/y247/PacerSS/100_0345.jpg)
Tires:
Stock Tire:
235/55-17 Goodyear Eagle RS-A Facotry tire no issues
225/60-16 Goodyear Eagle RS-A Tires have excellent dry, wet and snow handling and are a good all around tire, though they are extremely pricey. The treadwear is a bit above average.
Aftermarket:
235/45-17 on 17x7 wheels no problems
245/45-17 Essenza 210 Type R tires. Best tires I (PacerSS) have ever driven, dropped the F1 to use these tires from here on out, great wet, dry, snow traction, good all year round. http://www.truckaddons.com/images02/tires/essenza/R-Type1.jpg
255/45-17 tires can be run on a 17 x 8" Fittipaldi Force rim on a 6th gen with a stock suspension with almost no problems except hitting the wheel liner on hard dips with a full car, however, this size tire on the same rim causes rubbing and danage to the inner lip of the wheel well when lowered with the GMPP / Koni spring/struts on the same car. This damage and rubbing occurs all the time once lowered.
xxx/xx-xx Nitto NT555 Xtreme DR tires have excellent dry handling, very good handling in rainy conditions. They have extremely poor handling in snow, and I would not reccommend them for any sort of winter driving. The cost is fair at about $135-150 per tire, and the tread life is slightly better than average.
info from: Manitcor,HeavyChevy3800,1995DOHC,Malaclypse,Z28toaZ34,corning_d3,lav74,PacerSS,SSGirl,jimmyfloyd
Yokohama AVS ES-100
Nitto 555's
Falcon 512's
BFgoodrich Gforce-Sport
Tire pressure
If you upgrade to tires that are different then your factory wheels, you might need to recalibrate your tire pressure to match your new tires. This is more apparent, if you changed your tires from the recommended tire. For instance the stock tire for the 1996 Z-34 is 225/60-16" they recommend in the area of 32 LBS for the tires. If you change to a 225/55-16, you will need to raise the tire pressure to accommodate the different side wall change. Also, if you change to aftermarket wheels with a bigger diameter then the stock then you will also need to recalibrate the pressure.
The best way to calculate tire pressure is to see where the wear is on the tire and adjust it to meet the tread patch. If you don’t have one already, you will need a good tire pressure gauge. The ones at the pump can vary greatly and the cheep ones that look like pens can stick and give inaccurate readings as well. I recommend a dial type with pressure release or quality digital gauge.
Procedure:
1st) Start by taking the car for a drive to get the tires to normal driving temps. Do not do burnouts or ridiculous NASCAR stuff to heat them up faster, just go for a fun drive.
2nd) Cleaning your tires with soapy water to remove all dirt and go for a short drive around the block. This will allow smudging of the tires only where the tire meets the road.
3rd) If it less then like 75% of the tread area shows dirt or smudging, then you are over pressure. if you are showing wear beyond the tread patch, you are below pressure.
This is similar to the procedure that most people use for Auto Crossing. After a run if the wear is not perfectly on the tread patch, then add or remove until they line up.
You should check your pressure about every other time you get gas. At least, you should check them every time you get your oil changed.
