Biggest tires on 16" wheels

steve_wilwerding

steve_wilwerding

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I have a set of 16" Boxster wheels I'd like to use race rubber on - I have the Row M030 suspension installed - what are the biggest tires I can use? I've heard 225/50 on the fronts, 245/45 on the rear. Anyone running that?
 
for 16s I would run 245s front and rear.....the spec boxster guys calling it a square set up.
:D
I have driven a spec boxster with the "square" setup, and it turns in really nicely....also frees up the rear end at corner entry....:eek:
 
245s on 6" wide wheels seem pretty aggressive - I'd probably like to keep a little difference from front to rear, so it sounds like 225s on the front and 245s on the rear will work.

Do you think I'll have any issues with rubbing?
 
Steve what alignment specs are you using for your ROW suspension and is it the ROW M030 Sport version?
Thanks!
 
steve_wilwerding said:
245s on 6" wide wheels seem pretty aggressive - I'd probably like to keep a little difference from front to rear, so it sounds like 225s on the front and 245s on the rear will work.

Do you think I'll have any issues with rubbing?
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You won't have any issues with rubbing...I ran 225s on my 17s on the front...
If you were to run square I would suggest using a set of 4 rear 16s and then using the 245s.

but if you are tryingto stay with the wheels you have then 225 front and 245 rear will work.
 
Docdanracy said:
for 16s I would run 245s front and rear.....the spec boxster guys calling it a square set up.
:D
I have driven a spec boxster with the "square" setup, and it turns in really nicely....also frees up the rear end at corner entry....:eek:
Click to expand...

Check ...Square setup turns. Checkout the two black streaks behind the car and direction of the fronts. Drift city baby! :D
 

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offshore said:
Steve what alignment specs are you using for your ROW suspension and is it the ROW M030 Sport version?
Thanks!
Click to expand...

I don't currently have, but will this winter install the ROW M030 kit. I probably won't be running particularly aggressive camber settings as it will still be mostly a street car.
 
even with the ROW setup you won't be able to get a ton of negative camber up front anyway...maybe -1* or maybe a bit more but with the stockish style Boxster suspension negative camber is tough to come by.
Until you either lower the front considerably or go to GT3 lower control arms, there just isn't much available.
If you plan on doing track events I would also suggest looking into the ROW Boxster S suspension.
bit more roll stiffness since the bars are a bit stiffer. ;)
 
PCA Tech sent me a set of ROW M030 alignment settings which includes the Sport setup and according to them, and Sonnen, the "S" you are referring to is the Sport suspension and the only one currently available in the US. If you had installed your ROW suspension and had it aligned to those specs I was curious how the alignment worked out for you. My ROW M030 Sport suspension is close to the suggested and I'm thinking about having it aligned to Porsche's specs but the question Porsche can't answer is how does the alignment do in AX or DE as their specs are for "overall best tire wear and handling."
 
Back in the early 2000s there were two ROW M030 supsension set ups.
One was for the normal Boxster and one was for the S.
The S had slightly higher rate springs and stiffer (larger) hollow sway bars front and rear.
Maybe they no longer sell both complete sets...but if I were trying to get a ROW setup, I would be looking for the S spec ROW M030.
It will give you better spring and sway bar sizes for AX and DE events.
Even with the best of the M030 negative camber is tough to come by up front.
On my '99 I had H&R sport lowering springs mounted on stock struts. Then I mounted a front and rear set of ROW S M030 sway bars. The combination worked very well. I was only able to get about -1.25* upfront. And the H&R springs lower the car more than the ROW M030 springs.
My car was good enough for 1st place in AX series for a couple of seasons along with being very capable on the track...
 

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Boxsters are really moody when it comes to certain alignment settings and AX. I have found I have to change setup on my car pretty signficantly just depending on venue I plan to run. Running slower courses on cool cement I go for more tow out both front and rear. Then its a constant playing abround with dampers and bars. Faster venues on asphalt require me to go closer to 0 toe. I know people get hung up on camber but in my opinion Boxster is all about how much toe you have. As long as you have over -1 camber with DOT tires the toe element is going to be much bigger impact to how car rotates.

Amazing thing is even at same venue I went from disconnecting my rear bar and setting front dampers at full stiff to next weekend reconnecting rear bar and going full soft in front. It just all depends on features of the course.
 
Docdanracy said:
Back in the early 2000s there were two ROW M030 supsension set ups.
One was for the normal Boxster and one was for the S.
The S had slightly higher rate springs and stiffer (larger) hollow sway bars front and rear.
Maybe they no longer sell both complete sets...but if I were trying to get a ROW setup, I would be looking for the S spec ROW M030.
It will give you better spring and sway bar sizes for AX and DE events.
Even with the best of the M030 negative camber is tough to come by up front.
On my '99 I had H&R sport lowering springs mounted on stock struts. Then I mounted a front and rear set of ROW S M030 sway bars. The combination worked very well. I was only able to get about -1.25* upfront. And the H&R springs lower the car more than the ROW M030 springs.
My car was good enough for 1st place in AX series for a couple of seasons along with being very capable on the track...
Click to expand...

When I ordered my ROW suspension Sonnen did a search and there were three sets available in the US, two in their warehouse and one at Suncoast, and all three sets were ROW M030 Sport. I don't believe the sway bars were hollow but definitley larger in diameter. The springs lowered my car about an inch all the way around and the whole unit made my car feel like a new one as well as improved my AX times considerably. I looked at H&R springs but after asking around about them decided they were too stiff for what I wanted which is a car that has a good ride, handles well with less body roll, improved my AX times and handles well on the track. DE is next month so I will have a better handle on that but so far the ROW M030 sport suspension has accomplished everything I wanted it to do and besides the LN Engineering ceramic IMS has been the best single investment I've made in my car.
 
stock 996 and 986 sway bars (fronts are the same part number;)) and M030 Bars are all hollow IIRC. The diameter of the bar changes and so does the wall thickness of the metal to make the bar giving the increased roll stiffness.
H&R sway bars are solid.
 
Docdanracy said:
stock 996 and 986 sway bars (fronts are the same part number;)) and M030 Bars are all hollow IIRC. The diameter of the bar changes and so does the wall thickness of the metal to make the bar giving the increased roll stiffness.
H&R sway bars are solid.
Click to expand...

Good to know as I thought I had to step up to Renntech bars to get hollow. One thing I've been considering is larger drop links what do you think of that or is there another component you would change?
 
with your current setup, I would leave it exactly as it is and just enjoy it.
Since the bars are not adjustable, I don't feel different links will be of any help. If you had adjustable bars then different links would be helpful. I used stock links on my car and had no problems and the car handled extremely well. :)
The factory started using hollow bars on the 944 Turbo Cup cars. I had an '87 Turbo with full Turbo Cup suspension which included some HUGE hollow front and rear sway bars.
 
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