RippinRoo Posted January 30, 2006 Share Posted January 30, 2006 Back on topic... I fully agree with rfd425... If you are changing wheels and/or tires to a different size than stock, be aware that your speedo (and odo) might read differently than actual... do your homework... "I love the feel of wind in my face and boobies against my back." - BMW motorcycle rider Link to comment Share on other sites More sharing options...
SC GT Posted January 30, 2006 Share Posted January 30, 2006 I'm running 225/45/18s, 5.5% difference, and I love them. I previously ran 225/40/18 and 215/40/18 (practically stock height) and hated the fact that every road imperfection felt like it was going to kill my rims. With these, I feel I've got better grip than 215s, as much comfort and rim cushion as stock, and they really fill out the wheel wells nicely without much of a drop. A caveat is that my suspension is not stock, so this might not work for everyone. I've got Bilstein GT struts and Wangan springs (comparable to STi pinks in drop and rating). Speedo difference does not bother me. I pretty much know when I'm speeding. Link to comment Share on other sites More sharing options...
rfd425 Posted January 30, 2006 Author Share Posted January 30, 2006 I still would like to know whether the change in ride height caused by the wheels warrants getting an alignment. The way I see it, the Spec B tires are a full inch larger than stock LGT tires, so ride height will be 1/2 inch higher. Should people making this change get an alignment? Another question I have is regarding the Spec B suspension vs. the GT suspension. Since the Spec B suspension is designed for the larger wheels, are there any issues with putting the Spec B suspension on a car that is running the stock 17" LGT tires? Link to comment Share on other sites More sharing options...
Xenonk Posted January 30, 2006 Share Posted January 30, 2006 ^ it's not enough that it should matter.. but if you want to make the adjustment, you are free to do so.. for me, I dont bother with just a change in 1/32" worth of toe or 0.2 or 0.3 change in camber.. I just drive harder. Keefe Link to comment Share on other sites More sharing options...
Xenonk Posted January 30, 2006 Share Posted January 30, 2006 Another question I have is regarding the Spec B suspension vs. the GT suspension. Since the Spec B suspension is designed for the larger wheels, are there any issues with putting the Spec B suspension on a car that is running the stock 17" LGT tires? no, there isn't. Keefe Link to comment Share on other sites More sharing options...
ilh Posted January 30, 2006 Share Posted January 30, 2006 Why would the camber change with larger diameter wheels? Link to comment Share on other sites More sharing options...
Xenonk Posted January 30, 2006 Share Posted January 30, 2006 Why would the camber change with larger diameter wheels? different resting angle for the tire size.. not wheel size.. Keefe Link to comment Share on other sites More sharing options...
VXCL Posted January 30, 2006 Share Posted January 30, 2006 it's not going to matter that much.. I run oversized for a long time.. with 25.5" tires.. it's only to your benefit anyways as it lowers your odometer reading as you drive good news for me becuase i want to run 235/40 goodyear f1s on some 18x8 rims and their diameter is supposed to be 25.4 and yeah i wouldnt worry about it. i ran 36" x 14.5" tires on my 91 gmc and my speedo was about 6-7 mph off. i would not worry about one inch plus the benefits that xenon stated. also it create lower rpms cruising on the highway right? i know its minimal but still less wear and tear. ps i completely did not realize this tread was 3 pages and i barely read any of it MAYHEM #122/22 STS NNJR SCCA AUTOX4U.COM XENON RETRO GUIDE Link to comment Share on other sites More sharing options...
rallispec Posted January 30, 2006 Share Posted January 30, 2006 my car reads about 3-4% high when comparing it to my GPS unit. speedo will show 70mph, GPS will show 72-73mph. I'm not sure which one i trust more -- but a larger wheel would just offset that difference and mean my speedo is reading the same as the GPS. Link to comment Share on other sites More sharing options...
Waxiboy Posted January 31, 2006 Share Posted January 31, 2006 Here is mine...no problems, no adjustments. http://www.legacygt.com/forums/showthread.php?t=24653 Link to comment Share on other sites More sharing options...
rfd425 Posted January 31, 2006 Author Share Posted January 31, 2006 Here is mine...no problems, no adjustments. http://www.legacygt.com/forums/showthread.php?t=24653 Did you keep the stock Spec B tires on the rims? If so, your speedometer calibration will be off by about 4%. That's the whole reason I started this thread. Link to comment Share on other sites More sharing options...
Waxiboy Posted January 31, 2006 Share Posted January 31, 2006 Did you keep the stock Spec B tires on the rims? If so, your speedometer calibration will be off by about 4%. That's the whole reason I started this thread. Yes, stock 215/45/18. I'll have the dealer change the settings via the Subaru Select Monitor on my next oil change (it is free so take it there, otherwise I do it on my own). But I have a dilema: 1. My all seasons are stockers so I will need 215/50 (or 55)/17 to compensate. 2. Once the RE050s are gone, I'll go 1 size wider to 225/45/18 Link to comment Share on other sites More sharing options...
rfd425 Posted January 31, 2006 Author Share Posted January 31, 2006 Yes, stock 215/45/18. I'll have the dealer change the settings via the Subaru Select Monitor on my next oil change (it is free so take it there, otherwise I do it on my own). But I have a dilema: 1. My all seasons are stockers so I will need 215/50 (or 55)/17 to compensate. 2. Once the RE050s are gone, I'll go 1 size wider to 225/45/18 Wow, I didn't know they could change the setting at the dealer. If they will do it for free, even better! The 225/45/18's will be even taller than the 215's, but not enough to significantly affect the speedometer. You could go about the same amount the other direction by getting 225/40/18's, which would be slightly better for acceleration than the 225/45/18's. Link to comment Share on other sites More sharing options...
Waxiboy Posted January 31, 2006 Share Posted January 31, 2006 Wow, I didn't know they could change the setting at the dealer. If they will do it for free, even better! I meant the oil change is free (every 7500 miles). Everytime they hookup the monitor they said it will cost $50. Try this site to find out how 5 different sizes would affect your speedo http://www.1010tires.com/TireSizeCalculator.asp Link to comment Share on other sites More sharing options...
rfd425 Posted February 1, 2006 Author Share Posted February 1, 2006 Try this site to find out how 5 different sizes would affect your speedo http://www.1010tires.com/TireSizeCalculator.asp nice link! Link to comment Share on other sites More sharing options...
Mortal2None Posted February 6, 2009 Share Posted February 6, 2009 On my stock wheels on my 06 LGT Wagon, the speedo was about 3MPH too slow so it looks like they err on the side of caution. The dealer can recalibrate it but I didn't need to since I went to 18's. I'm still 1mph slow at cruising speeds... (Verified by 2 GPS's and lidar ) Link to comment Share on other sites More sharing options...
str8dwn Posted February 8, 2009 Share Posted February 8, 2009 Should people making this change get an alignment? I certainly would and did. It makes sense that since you are changing how the original alignment was calculated (using original wheels), so you should have it re-adjusted. I mean, what's another $60-70 on a wheel/tire purchase to increase tire life? My speedo is slower, but most of my driving is at city speeds, so the difference is negligible. I'm running 235/35/19 with a diameter of 25.5. Link to comment Share on other sites More sharing options...
fzanetti Posted May 22, 2009 Share Posted May 22, 2009 On my stock wheels on my 06 LGT Wagon, the speedo was about 3MPH too slow so it looks like they err on the side of caution. The dealer can recalibrate it but I didn't need to since I went to 18's. I'm still 1mph slow at cruising speeds... (Verified by 2 GPS's and lidar ) And what did you get for wheels on your wagon pal??? Flavio Zanetti Boston, MA Link to comment Share on other sites More sharing options...
Mortal2None Posted May 23, 2009 Share Posted May 23, 2009 And what did you get for wheels on your wagon pal??? Flavio Zanetti Boston, MA Tried a few sets (Prodrive and Enkei) and finally decided on the Prodrive PFF7's with 225/40/18's. Link to comment Share on other sites More sharing options...
fzanetti Posted May 23, 2009 Share Posted May 23, 2009 Tried a few sets (Prodrive and Enkei) and finally decided on the Prodrive PFF7's with 225/40/18's. I am considering those too... 965 on sale here: http://www.rallysportdirect.com/static/open-box-prodrive-pff7-athracite-5x100-p-270.html Or GT1's (18x7.5) from FredBeansparts for 925.... :-) Flavio Zanetti Boston, MA Link to comment Share on other sites More sharing options...
Mortal2None Posted May 24, 2009 Share Posted May 24, 2009 I am considering those too... 965 on sale here: http://www.rallysportdirect.com/static/open-box-prodrive-pff7-athracite-5x100-p-270.html Or GT1's (18x7.5) from FredBeansparts for 925.... :-) Flavio Zanetti Boston, MA I emailed them awhile back on those and I think they sold. (Unless they have another damaged set) For 18x8 wheels the PFF7's cant be beat. (Perfect fit for the Legacy @ 51mm offset) For 18x7.5 the GT1 and Enkei RS+M's are awesome choices. Jeremy from Fred Beans is a class act also and he stands behind everything he sells. Can't go wrong there. Link to comment Share on other sites More sharing options...
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