what offset for 16x7 with 245/50/16 tires? Possible?

[Sordz]

title says it all, been thinking about changing up the 225/50/15 drag radials for some 245/50/16 but not sure if this is possible with a 93 accord? wanting a taller tire without going full 26" since im running a h23 tranny and should change top of 4th from 125 to 137mph.

So with a 245/50/16 what offset would I need for a 16x7 wheel?

Also how high are you guys reving out a stock h22 head? I should be making around 600whp btw.

thanks to all for your help.

[Night Wolf]

245/50/16? damn never seen that on a CB. with the 225s I had it rubbed like hell

[gloryaccordy]

245/50/16?

I think that is too much

Have u tried ur runs with an F22 tranny?

[Sordz]

have not tried a F tranny, read they couldnt handle the power I am making. looking for alittle height also so the downpipe is further from the ground. I dont mind if it sticks out a bit im just not sure what offset would work. I wouldnt run wide tires in the back either just looking for input for the front, no one really has done this kind of setup on a accord here?

If no one has any info I may just run a 235/60/15 but I would rather not.

[mondojackal]

You can prolly get away with something like a +30 offset or so. Really, though, you'd be safer to err on the high side (+40 to +45) just because then, if it's too far inside (rubs the coilover/spring perch/whatever) then you can always add spacers to push it further out. However, if you have too low of an offset (+20 or so), then you're going to stick out quite a bit past the fender, and you're already going to stick out an inch or so, I think.

Are you running coilovers or a strut-type suspension?

*edit*

Here's a pic of my car from back in the day.



That's a 215 tire on a 7.5 with a +42 offset. This setup almost rubs the spring perch on the inside (towards the centerline of the car). If you have a tire that's 30mm wider (245mm-215mm=30mm) then, to keep your same inside clearance (we're just talking width right now, I'm not sure about overall height, but we can visit that in a little bit) you would need a wheel with an offset that's 30mm less than +42 or +12mm.

Now, if you have coilovers, then you might be able to get some additional inboard clearance, and you can negate some of what I'm saying, but you will still have some tire sticking out past the fender. I don't really see any way past that.

About overall height, this will add about an inch to overall height ABOVE THE TIRE SIZE THAT I HAVE ON MY CAR IN THAT PICTURE.

If you want to do some additional calculations on tire height..
http://www.miata.net/garage/tirecalc.html

[yoracing]

245 only if youre running fender flares.. 225 is the widest.

[Sordz]

You can prolly get away with something like a +30 offset or so. Really, though, you'd be safer to err on the high side (+40 to +45) just because then, if it's too far inside (rubs the coilover/spring perch/whatever) then you can always add spacers to push it further out. However, if you have too low of an offset (+20 or so), then you're going to stick out quite a bit past the fender, and you're already going to stick out an inch or so, I think.

Are you running coilovers or a strut-type suspension?

*edit*



That's a 215 tire on a 7.5 with a +42 offset. This setup almost rubs the spring perch on the inside (towards the centerline of the car). If you have a tire that's 30mm wider (245mm-215mm=30mm) then, to keep your same inside clearance (we're just talking width right now, I'm not sure about overall height, but we can visit that in a little bit) you would need a wheel with an offset that's 30mm less than +42 or +12mm.

Now, if you have coilovers, then you might be able to get some additional inboard clearance, and you can negate some of what I'm saying, but you will still have some tire sticking out past the fender. I don't really see any way past that.

About overall height, this will add about an inch to overall height ABOVE THE TIRE SIZE THAT I HAVE ON MY CAR IN THAT PICTURE.

If you want to do some additional calculations on tire height..
http://www.miata.net/garage/tirecalc.html

The car has tokkiko or whatever the spelling is and some coilover sleeves if that helps. So your saying a +12ish offset might work best based off your +42 and subtract the extra width I will have? I was thinking spacers but I am not sure if there legal to run at the track? Here is a picture of my car with 195/60/15 in the rear and 225/50/15 drag radials in the front, look so small... also if I have to mod some fender flairs I will since the fenders are fiberglass but this car is more purpose built so dont really care at this point.

Thanks for the input guys keep it coming! Sounds like I might need a staggered wheel setup so the rear will still fit.

[led_fut]

I can't chime in with any help, but I really want to see more pictures... and some engine specs, dyno etc.

POST UP

[mondojackal]

Hmm, since you have coilover sleeves, you should have some additional inboard clearance that regular shock/spring guys don't have. OR maybe you just have sleeves on a regular damper? In any case, take your current wheels and measure the distance from the inside bead to the damper (straight horizontal measurement).

Also, I'd check and see what kind of clearance you have around the tire as well, as this can obviously be a spot for trouble, too. If you have any additional room, then plan on using it.

It's just simple math with adding the width. Remember though, if you want to keep the inboard location the same, you'll have to do the same offset math that I mentioned in my earlier post with the subtraction of the 30mm. Hope this helps.