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850 Posts
I've read the sticky for this very topic above. It has fallin a bit short and not logically accurate. I researched a bit because it didn't make sence from my past experience in the field. I came to conclude the following,
Stock tire sizes as recommended by Honda for the Si,
215/45 R17 the tire diameter is 24.6"
215/40 R18 " " " " 24.8"
As suggested by the sticky here
225/40 R18 the tire diameter is 25.1"
It is no wonder some members have experienced tire rubbing and such using 225/40 R18 whereas they are generally almost 1/2 of an inch taller than stock. Also some of you scratch your heads thinking member A is BS ing about a time slip that is quicker than yours. You have several mods and he has none. Never considering you may have missed your setup with your first mod. Your tires are taller, you just geared it for the highway! Not the dragstrip or getting out of corners quicker.
So how about this,
225/35 R18 the tire diameter is 24.2"
I think it is a better choice. This size is not as popular as the 225/40 R18 and generally will cost more per tire. You will likely get pulled over less by 5 o because you speedo is closer to the actual than with the taller tire that makes your speedo read a slower mph. Thats right, your speeding and you didn't even know it. Good discussion to have with a judge if you have a speeding ticking. Blame it on improper tire sizing. GL though! So your speedo will click a few extra with these but it is soo close. Now time to research wheel widths to maintain proper aspect ratio. Someone think they know. Post it.
Heres another final thought,
The difference between 225/40 R18 and 225/35 R18 is almost 1 whole inch in height. I'd say that free ET.
:vtec:
http://http://www.onlineconversion.com/tire_size_conversion.htm
Stock tire sizes as recommended by Honda for the Si,
215/45 R17 the tire diameter is 24.6"
215/40 R18 " " " " 24.8"
As suggested by the sticky here
225/40 R18 the tire diameter is 25.1"
It is no wonder some members have experienced tire rubbing and such using 225/40 R18 whereas they are generally almost 1/2 of an inch taller than stock. Also some of you scratch your heads thinking member A is BS ing about a time slip that is quicker than yours. You have several mods and he has none. Never considering you may have missed your setup with your first mod. Your tires are taller, you just geared it for the highway! Not the dragstrip or getting out of corners quicker.
So how about this,
225/35 R18 the tire diameter is 24.2"
I think it is a better choice. This size is not as popular as the 225/40 R18 and generally will cost more per tire. You will likely get pulled over less by 5 o because you speedo is closer to the actual than with the taller tire that makes your speedo read a slower mph. Thats right, your speeding and you didn't even know it. Good discussion to have with a judge if you have a speeding ticking. Blame it on improper tire sizing. GL though! So your speedo will click a few extra with these but it is soo close. Now time to research wheel widths to maintain proper aspect ratio. Someone think they know. Post it.
Heres another final thought,
The difference between 225/40 R18 and 225/35 R18 is almost 1 whole inch in height. I'd say that free ET.
:vtec:
http://http://www.onlineconversion.com/tire_size_conversion.htm
