Jump to content
SAU Community

Tyre Widths For 9 Inch Wheels...


Recommended Posts

I have r33gtr wheels on my s13.

I am looking at buying some R rubber in the near future.

I like the look and the reports i have read about the re55's.

My main concern is that i currently have a 225 street tyre fitted and it has left me with next to no clearance on the suspension, thats with a 30mm bolt on spacer. i think i should be able to fit the 235 40 17 that the re55's are made in, i am just concerned that the width (235) is a little narrow for a 9 inch wide wheel. i wouldn't want the tyre to pop off the rim under hard cornering etc.

also does anyone know of an R rubber tyre that comes in 225 40 17, and if that would be ok on a 9 inch wide wheel?

i really like these wheels and would like to use them as my track day wheels, obviously this will only happen if i can get a tyre combo that will fit and be safe.

Link to comment
Share on other sites

i am just concerned that the width (235) is a little narrow for a 9 inch wide wheel. i wouldn't want the tyre to pop off the rim under hard cornering etc.

Well my 215/45s have not popped off after grip track days, smashing the wheel on a gutter or

light easterly breezes, so I think you will have no problems, but no, nobody makes a 225/40R17 R-tyre

I have looked :P

IMG_0365.jpg

p.s. I have lowered my car since this pic so don't worry...

p.p.s Does anybody search at all?

235/45 on 17x9

IMG_0368.jpg

215/45 on 17x9

IMG_0366.jpg

Link to comment
Share on other sites

QUOTE:Well my 215/45s have not popped off after grip track days, smashing the wheel on a gutter or

light easterly breezes, so I think you will have no problems, but no, nobody makes a 225/40R17 R-tyre

I have looked

i understand normal road tyres will stay put on the wheels, even when given a hard time, i was more concerned that r rubber usually has a very stiff side wall and it may tend to be less happy to stretch onto a wider than suited wheel.

thanks for the reply.

i did searh, but found it hard to narrow down what i wanted to know, so search results were very broad.

if anyone knows of an R rubber tyre that is made in 225/40R17 please point me in the right direction.

Edited by R32gts-t
Link to comment
Share on other sites

Personally i wouldnt run anything less than a 245 on a 9" rim in R compound and especially with RE55's, the bridgies tend to have much stiffer side walls than most semi slicks anyway, so not only will the tyre fitter have a massively hard time getting them on (if at all) but i'd say you'll have alot of trouble with ride quality and will have to run higher pressures to stop them getting nudged off the bead..

Link to comment
Share on other sites

i understand normal road tyres will stay put on the wheels, even when given a hard time, i was more concerned that r rubber usually has a very stiff side wall and it may tend to be less happy to stretch onto a wider than suited wheel.

Well I am running Dunlop Z1 tyres (top pic) they aren't what I call normal road rubber they are not D01Js but they are not Korean Tempe tyre specials either.

What you find with tyres is that they seem to mould to the wheels, I was recently trying to put some 225/45 onto a 9" wheel after having spend god knows how long on a 7.5" wheel and it was just not happening.

But when I took my Z1 tyres off the wheel I destroyed (they retained pressure after the incident) they had changed shape to suit the 9" wheel... Mounting a second time required no special techniques whatsoever.

The only real problem you will have is that nobody will either know how to or be willing to put them on for you.

I would be really interested to know the circumstances of anyone having sealing problems, the only person I know who has runs second hand Commodore tyres 235 which have spent ages on an 8-inch rim then sticks them on his 10.5 (IIRC) which is a larger stretch the 215/45 on 9-inch.

Interesting how everone is an expert on the consequences of something that nobody ever does :ninja:

Link to comment
Share on other sites

At the moment i have 235/40-18s on 10.5" rears and 225/40-18s on 9.5 fronts. Only reason i have this is because fitting 10.5" rims on the back of a gtst is nearly impossible with just rolled guards. If i used bigger than 235s then the tyres will hit on the guard and also stickout past the guard. The person that had the car before i bought it has been using this size tyre for 2yrs and i have been for a yr without any problems from damage or the police.

Link to comment
Share on other sites

i just found out that toyo proxes r888 come in a 225 45 17

how do they compare with the bridgestone re55's does anyone know?

alternatively i am going to try and squeeze some 235 40 17's on.

Edited by R32gts-t
Link to comment
Share on other sites

Hi Duncan , what offset 17x8's did that R33 GTST have ? I have Rays 17x8.5 30P and plan to fit 235 45's when these noisy G grids wear out .

Also though slightly O/T , if R33 GTR's had 245 45 17's on the back how did Nissan correct the speedo error compared to 33 GTST's std rolling diametre if the diff ratio and speedo gear is the same ?

Cheers A .

Link to comment
Share on other sites

Okay then, similar question...Does anyone know the maximum tyre width that will fit onto an 18x8" rim?

I'm presently running 235/40 R18 on 350Z Track rims, but would like to go a bit wider on the rear next time around...

245's would seem logical as the Z already comes with these - but the problem is that to get the correct rolling diameter for an R33 I'd have to get 245/35 R18s (-0.5% different diameter to standard)....a bit of an unusual size apparently...the only tyre manufacturer online I could find that lists them at a semi-reasonable price is Kumho with their KU19 (I had bad experiences in the past with these too)

...Now if I could squeeze a set of 255/35 R18s (+0.60% different diameter to standard) onto the back that would be a lot easier as they seem to be readily available.

...but:

a) would it be possible & safe?

b) would it look terrible (bulging outwards etc)?

Any insight would be appreciated!

Link to comment
Share on other sites

Not pushing it at all...depends on the brand of tyre.

Toyo specifes that their Proxes 275s will fit on a 9inch rim. You just need to do the homework.

I just put a couple of pirelli P ZEROs 285/30/18 on the back of my GTS-T, which is on a 9" rim.

Link to comment
Share on other sites

Okay then, similar question...Does anyone know the maximum tyre width that will fit onto an 18x8" rim?

I'm presently running 235/40 R18 on 350Z Track rims, but would like to go a bit wider on the rear next time around...

245's would seem logical as the Z already comes with these - but the problem is that to get the correct rolling diameter for an R33 I'd have to get 245/35 R18s (-0.5% different diameter to standard)....a bit of an unusual size apparently...the only tyre manufacturer online I could find that lists them at a semi-reasonable price is Kumho with their KU19 (I had bad experiences in the past with these too)

...Now if I could squeeze a set of 255/35 R18s (+0.60% different diameter to standard) onto the back that would be a lot easier as they seem to be readily available.

...but:

a) would it be possible & safe?

b) would it look terrible (bulging outwards etc)?

Any insight would be appreciated!

A 255 would fit easy. might come out a touch good protection for ur rims lol.

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share



  • Similar Content

  • Latest Posts

    • Y'know what, after reading a topic on a 360kw build using a nistune (who ended up going LINK), im now considering a LINK over a nistune. The engine protection alone would probably be worth it. And id like to learn to tune so would be nice to have that safe guard. Which means i probably wont need a boost controller then, or the R35 MAF.  Becoming a bit of a blog now but oh wells. As mentioned previously, the goal is around 300kw, for a daily driver. Will be looking at fitting a highflow turbo or similar (something that doesnt require downpipes, manifolds etc to be changed out) when the current stock gives out or the money for it is there. 
    • Thanks guys. Are you meant to tighten the converter bolts through the starter motor hole? Think my plate between gearbox and engine is one piece. Im heading up there tomorrow.
    • Picked my tailshaft up yesterday arv!! Test fit it and because they've gone to a ford centre bearing and CV I had to modify the mounting bracket a little bit. 5mm of each side and she went up into position and fits well. It has a 1350 uni and flange on the gearbox end so it should be plenty strong!  Got stuck in this morning and started on the wiring mess. Cut out all the wires not required that go to the body connector and cut the engine harness out. Need to go through and work out which ones I need to keep and rewire into the new ecu. Should save a small amount of weight as well. I'd love to get in and rip the dash and everything out to completely remove wiring but cbf.  Next up was the power harness for alternator, starter etc. It has a few connectors from factory that run out of it. Cut it all apart and removed what was no longer required and put some new corro and taped it all back up and bolted it all back into place.  After that I worked out where I can mount the new flex sensor. Found a couple of factory bolt holes and drilled a new hole on the bracket to suit. Need to go get a few fittings and adapters tomorrow so I can keep going.   
    • Nah, im after the more newer looking, one with the OLED display
    • We revised the neutral wire instructions. The old way was wrong.  R34 gearbox change.pdf
×
×
  • Create New...