Jaxx Posted February 8, 2005 Share Posted February 8, 2005 howdy so i sold the formals today formula mesh on the way what tires sizes have people been using i do not want to go with a larger (diamater) ala the spec B 215/40/18 .6% smaller 225/40/18 1.9% smaller and relitivly cheep 245/35/18 .5% smaller Link to comment Share on other sites More sharing options...
SC GT Posted February 8, 2005 Share Posted February 8, 2005 I'd go with 235/40/18. I have 225/40/18s, and I'd like a little more sidewall. The 215/40s would be even less. Link to comment Share on other sites More sharing options...
kanoswrx Posted February 8, 2005 Share Posted February 8, 2005 The formula mesh's are 18x8. I'd go with 245/35/18. I have spec b rims and will be going with 225/40/18, but my rims are only 18x7. Link to comment Share on other sites More sharing options...
Xenonk Posted February 8, 2005 Share Posted February 8, 2005 225/40/18 is the common size for everyone (from 7" wide to 8" wide). Unless your new Formula Mesh are 8" wide, the 245/35/18 would be the choice for more grip. Any reason why you want to go with a smaller size than Spec B size? Keefe Keefe Link to comment Share on other sites More sharing options...
hal9e3 Posted February 8, 2005 Share Posted February 8, 2005 235/35-18 or 245/35-18 will preserve rolling diameter within ~0.5%. As Keefe says 235 is pretty rare, tho Tire Rack shows a couple of nice tires by Pirelli and B. F. Goodrich. Link to comment Share on other sites More sharing options...
PGT Posted February 9, 2005 Share Posted February 9, 2005 225/40/18's have more sidewall than stock (I have placed them on 18x7.5 wheels and compares side by side with stock wheels/tires and they are definitely taller). Where are you getting the figures that they are smaller rolling diameter than stock? Jaxx - definitely snap some pics when you get the wheels on. What color did you get? Link to comment Share on other sites More sharing options...
Xenonk Posted February 9, 2005 Share Posted February 9, 2005 he's comparing to JDM Spec B tire sizing (235/40/18?) Keefe Keefe Link to comment Share on other sites More sharing options...
PGT Posted February 9, 2005 Share Posted February 9, 2005 Spec B's are 215/40/18 RE050's, AFAIK Link to comment Share on other sites More sharing options...
Guest turboman Posted February 9, 2005 Share Posted February 9, 2005 If you watch "Sportscar Revolution" on cable you saw the program where they went plus 2 on wheel size (same weight as the stock wheels)(I think it was on the racing KIA), and increased the brake rotor size. They lost 12hp on the chassis dyno and couldn't figure out why. An engineering research firm was consulted. Turned out the the larger rotating mass magnifies the "flywheel effect", in other words, the farther the mass is from centerline the greater the effect. So it's just not the weight, it's the overall diameter. Link to comment Share on other sites More sharing options...
Xenonk Posted February 9, 2005 Share Posted February 9, 2005 It's actually location of the weight as well (momentum or moment calculations). There was a discussion on wheel weights and such for calculating power loss. But nevertheless, the discussion is about what is the average tire size that everyone else is using for an 18" rim. It's up to Mr. Jaxx to decide how he wants to go about what he wants to do for his car and his ride. Keefe Keefe Link to comment Share on other sites More sharing options...
Guest turboman Posted February 9, 2005 Share Posted February 9, 2005 It's actually location of the weight as well (momentum or moment calculations). There was a discussion on wheel weights and such for calculating power loss. But nevertheless, the discussion is about what is the average tire size that everyone else is using for an 18" rim. It's up to Mr. Jaxx to decide how he wants to go about what he wants to do for his car and his ride. Keefe ...well spoken. Link to comment Share on other sites More sharing options...
SC GT Posted February 9, 2005 Share Posted February 9, 2005 Spec Bs are 215/45/18. Link to comment Share on other sites More sharing options...
Jaxx Posted February 9, 2005 Author Share Posted February 9, 2005 formula mesh is 18x8 right now probbly go 225/40/18 kumho ASX as price is defanatly a consideration as for wheel weights ... oh yeah no question about it but the car has to have some bling to it to compensate for the car its parked next to (flat black 93 wrx) probbly gonna go with the steel gray havn't decided yet i can't put them on for a month and a half (snow) Link to comment Share on other sites More sharing options...
Xenonk Posted February 9, 2005 Share Posted February 9, 2005 You might want to consider a set of Toyo Proxes4 if you are thinking of getting a set of Kumho ASX (the Proxes4 are more grippy in the snow than the Kumhos from my experience). Keefe Keefe Link to comment Share on other sites More sharing options...
PGT Posted February 9, 2005 Share Posted February 9, 2005 I have 225/40/18 Kumho ASX on my car right now and they are not much good in the snow. Better than a summer tire for sure, but not by much. AFAIK, the Toyo's are the same price range (and probably lighter weight) Link to comment Share on other sites More sharing options...
SC GT Posted February 9, 2005 Share Posted February 9, 2005 he's comparing to JDM Spec B tire sizing (235/40/18?) Keefe The JDM Spec B size (215/45/18) has a sidewall height of 3.8". A 235/40/18 has a sidewall height of 3.7". So it is actually smaller in diameter than the Spec Bs. I've got the Spec B rims, so I'm thinking about going to 225/45/18, which would be slightly larger than the Spec B tires, but would comfortably fit on the Spec B rims. 215/45/18 is a nearly impossible size to find in the US. Link to comment Share on other sites More sharing options...
Jaxx Posted February 9, 2005 Author Share Posted February 9, 2005 snow is not a consideration.. i just don't want another set of 200 tread wear tires i have some nasty studded-mudder-truck tires in 205/55/16 on there right now the asx has a much higher max load capacity too http://www.tirerack.com/tires/Spec.jsp?make=Kumho&model=ECSTA+ASX&partnum=24WR8EASX&vehicleSearch=false&fromCompare1=yes putting spec B size tires on will be like changing to a 3.95 final drive ratio Link to comment Share on other sites More sharing options...
Xenonk Posted February 10, 2005 Share Posted February 10, 2005 not all treadwear mean the same from manufacturer to manufacturer.. it's easier to relate to it's own model lineup within the same manufacturer when comparing treadwears. I had a set of treadwear 280 (Yokohama Paradas) that I wore down in a matter of 300 miles (yes, you are reading that number correctly, through HARD driving), while my Falken Azenis RT-215 (treadwear 200) last a good 3000 miles of the same HARD driving). Most of the time, the treadwear only gives you an idea of how soft the rubber compound is and how well it bonds to itself. Once you start adding heat from the driving, you might as well forget about the treadwear. A couple of my tires I had in the past (DOT race tires) had a treadwear of 60 which lasted me a good 10,000 miles on the street with very conservative driving. Note: RE92s are rated at 140 to 160 treadwear. Max Load Capacity is based on the tire size and maximum tire pressure, not so much from brand to brand (very rare that you will find a particular tire company that can make a stiffer sidewall, often reinforced, but it still depends on tire pressures to help hold up the sidewalls). As for running 225/45/18, it's a taller tire overall than stock (215/45/17) of a margin at 26" vs 24.6" (which I think Mr. SCGT meant to type 225/40/18 which is a better comparison at 25.1" since that is what your tirerack seach was showing on the ASX). i have some nasty studded-mudder-truck tires in 205/55/16 on there right now Those sizes are either for a Legacy 2.5i or a WRX.. I doubt you can fit a 16" on the GT since it comes with bigger brakes.. check your size again. If you want your tires to last longer, goto a speed shop with laser alignment equipment and make sure that your toe settings all the way around are set at 0". Typically toe wears out a tire faster than you can imagine (especially toe-in at 3/32").. and not many people's naked eyes can see a difference in the car's track lengths of 60.0" vs. 59.91", check your alignment to get the most life out of your tires. Keefe Keefe Link to comment Share on other sites More sharing options...
Xenonk Posted February 10, 2005 Share Posted February 10, 2005 Jaxx, thought you might get a kick out of this tire's Maximum Load Capacity http://www.tirerack.com/tires/Spec.jsp?make=Bridgestone&model=Potenza+S-02+A&partnum=74ZR8S02A&vehicleSearch=false&fromCompare1=yes (Refresh the page if it say "Session Expired") Keefe Keefe Link to comment Share on other sites More sharing options...
PGT Posted February 10, 2005 Share Posted February 10, 2005 typo? Link to comment Share on other sites More sharing options...
Xenonk Posted February 10, 2005 Share Posted February 10, 2005 a funny typo tho Keefe Keefe Link to comment Share on other sites More sharing options...
Jaxx Posted February 10, 2005 Author Share Posted February 10, 2005 no thats exactly the size that i am running w/front wrx calipers/rotors http://home.velocitus.net/jaredw/images/12-30-04_1112.jpg 215/45/17 snow tires are expensive and i had a set of 205/55/16 on 2000 RS wheels and wrx brakes on my project car so i swapped them over it works out to a 4.5 % rear bias shift i am willing to sacrafice performance for life span .. at least this time around yeah i will get it aligned when i switch suspension Link to comment Share on other sites More sharing options...
Xenonk Posted February 10, 2005 Share Posted February 10, 2005 ah, decided to shift the brake bias to the rear I see. I opted to get harder springs to keep the rear end planted instead. Keefe Keefe Link to comment Share on other sites More sharing options...
SC GT Posted February 11, 2005 Share Posted February 11, 2005 As for running 225/45/18, it's a taller tire overall than stock (215/45/17) of a margin at 26" vs 24.6" (which I think Mr. SCGT meant to type 225/40/18 which is a better comparison at 25.1" since that is what your tirerack seach was showing on the ASX).Actually I am thinking about going to a 225/45/18. I am running Spec B rims, and eventually I'm going to be running Spec B struts and springs. The Spec B sized tires are one inch larger in diameter than the stock USDM tires. Therefore, if I go 225/45/18, I'd only be around .4" greater than stock Spec B. My question is, assuming no rubbing, what are the drawbacks to going to such a larger sized tire? I know my speedo will be off and it will be the equivalent of making my gearing a little longer. Anything worse than that? Link to comment Share on other sites More sharing options...
Chris Posted February 11, 2005 Share Posted February 11, 2005 Not sure if you guys posted this, but here is a calculator that will help determine the differences with different sizes: http://ejelta.com/tiresize/index.html?tiresize=185/60-15 Link to comment Share on other sites More sharing options...
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