New front tires are sticking out @1/2 inch. Now what?
03-31-2012, 08:40 PM
#61
Captain Obvious
Super User
Super User
Get a 225 set that is trully is 225mm wide. Tire manufacturers can have as much as 10% variance. Not all 225s are the same size. If the sidewall angle is slighly less than ideal, and yo are not tracking hte car, you will never notice the difference.
04-01-2012, 10:25 AM
#62
Three Wheelin'
Thread Starter
OK, I was traveling a bunch when I ran into this tire problem and didn't have the chance to double check my outer lip measurement. The supplier of lips guessed from a picture that I was running 1" lips up front but If I'm measuring correctly I have 1.5" lips up front.
So am I looking at some good news here? See enclosed picture for how I measured. If the supplier has 1" lips, does that mean that I can take a half inch off the outer lips and solve my 0.50 too extended problem!?
So am I looking at some good news here? See enclosed picture for how I measured. If the supplier has 1" lips, does that mean that I can take a half inch off the outer lips and solve my 0.50 too extended problem!?
04-01-2012, 09:58 PM
#64
Three Wheelin'
Thread Starter
Crap. But thanks for your help. I'll call tire rack first thing tomorrow and discuss changing tire size as suggested above. I looked around online a little and I would really miss my current wheels. I don't see any options that I like anywhere best as much as my current wheels. Hopefuly the "smaller" tire size can save the day here.
04-01-2012, 10:18 PM
#66
Three Wheelin'
Thread Starter
Sounds good, but you want the 235/45, not the 235/40, if the sidewall height was a concern for you. A 235/40 is going to be significantly shorter than your 265/40 rear, and you said you don't want that. Like I mentioned above, a 225/45 is a taller tire than a 235/40, so if a 225/45 was too short for you, a 235/40 most definitely will be. You could run the 235/40 though, and it would give you more clearance in the front, but it will be almost an inch less in diameter from your rear tires.
I just was checking on Tire Rack and I don't see the Dunlops in 235/45/17.
04-01-2012, 10:33 PM
#67
Under the Lift
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I know Mark is right - wheel widths are measured between the inside beads. A 9" wheel (bead to bead) measures 10" between the outer lip edges. Still, I'd check with the wheel supplier, maybe send him that photo. Offset and backspacing, on the other hand, are measured from the outer lip edges.
04-01-2012, 10:36 PM
#68
Under the Lift
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04-02-2012, 10:09 AM
#69
Rennlist Member
sweet 928,
First, going to a 10 mm narrower tire will only remove 5 mm of the width on the outside. The other 5 mm reduction is on the inside.
IF you decide to go to the Cup II wheels like were on the GTS, you'll have difficulty finding any front wider than the 7" that was on the 911's. The 7.5" et 65 17" fronts were on '93 GTS's and on some 968's, but are very rare.
IF you want wider tires/rims up front, I have a set of OE Porsche 8" et 70 17" Cup II wheels that are even harder to find (and superior to the GTS ones). GTS's of course were quite rare, and the Cup II wheels were only on the later '94's and 95's. The 93's and early 94's in the US had Cup I wheels. The et 70 essentially leaves the centerline of the wheel/tire in the exact same place as the OE 7.5" on the GTS's, while giving a wider tire option. There are probably only a few dozen sets of these in the US!! They were original "winter" rear wheel on 911's that were going to northern Europe, and a few in Canada, northern US. I searched 2 years for the first set, and have obtained two other sets of 8" et 70's in the past 4 years. Kept the first set for my GTS, sold the second set, and found the third set this winter.
The 8" ones are for sale, but aren't "cheap" like the 7" et 50's that were on the fronts of the 911's are!!
Cheers,
Gary Knox
First, going to a 10 mm narrower tire will only remove 5 mm of the width on the outside. The other 5 mm reduction is on the inside.
IF you decide to go to the Cup II wheels like were on the GTS, you'll have difficulty finding any front wider than the 7" that was on the 911's. The 7.5" et 65 17" fronts were on '93 GTS's and on some 968's, but are very rare.
IF you want wider tires/rims up front, I have a set of OE Porsche 8" et 70 17" Cup II wheels that are even harder to find (and superior to the GTS ones). GTS's of course were quite rare, and the Cup II wheels were only on the later '94's and 95's. The 93's and early 94's in the US had Cup I wheels. The et 70 essentially leaves the centerline of the wheel/tire in the exact same place as the OE 7.5" on the GTS's, while giving a wider tire option. There are probably only a few dozen sets of these in the US!! They were original "winter" rear wheel on 911's that were going to northern Europe, and a few in Canada, northern US. I searched 2 years for the first set, and have obtained two other sets of 8" et 70's in the past 4 years. Kept the first set for my GTS, sold the second set, and found the third set this winter.
The 8" ones are for sale, but aren't "cheap" like the 7" et 50's that were on the fronts of the 911's are!!
Cheers,
Gary Knox
Last edited by Gary Knox; 04-02-2012 at 12:44 PM.
04-02-2012, 11:24 AM
#70
Rennlist Member
Not trying to spoil your sales pitch, but...
I was looking for 17" Cup IIs this winter, and sourced both 8" et70 and 7.5" et65 immediately. Maybe they are less rare in Europe.
I ended up getting the skinny ones
M
I was looking for 17" Cup IIs this winter, and sourced both 8" et70 and 7.5" et65 immediately. Maybe they are less rare in Europe.
I ended up getting the skinny ones
M
04-02-2012, 03:49 PM
#71
Rennlist Member
MM,
It may be that more people in Europe drive their Porsches in the winter than owners in the US do. Most 911's in the US are stored during the winter - too much salt etc. on the roads in the cold states that owners do not want to expose their cars to. Congrats on the find in Europe. I have an acquaintance who found and bought a set of 9 X 17 et 70 wheels in Europe that he has mounted on the front of his 928 GT. Shipping, as you can imagine was quite expensive!
I don't know of anyone who has seen a pair of these available in the US, but I did see ONE for sale on ebay a few weeks ago!
Gary-
It may be that more people in Europe drive their Porsches in the winter than owners in the US do. Most 911's in the US are stored during the winter - too much salt etc. on the roads in the cold states that owners do not want to expose their cars to. Congrats on the find in Europe. I have an acquaintance who found and bought a set of 9 X 17 et 70 wheels in Europe that he has mounted on the front of his 928 GT. Shipping, as you can imagine was quite expensive!
I don't know of anyone who has seen a pair of these available in the US, but I did see ONE for sale on ebay a few weeks ago!
Gary-
04-02-2012, 03:55 PM
#72
Three Wheelin'
Thread Starter
sweet 928,
First, going to a 10 mm narrower tire will only remove 5 mm of the width on the outside. The other 5 mm reduction is on the inside.
IF you decide to go to the Cup II wheels like were on the GTS, you'll have difficulty finding any front wider than the 7" that was on the 911's. The 7.5" et 65 17" fronts were on '93 GTS's and on some 968's, but are very rare.
IF you want wider tires/rims up front, I have a set of OE Porsche 8" et 70 17" Cup II wheels that are even harder to find (and superior to the GTS ones). GTS's of course were quite rare, and the Cup II wheels were only on the later '94's and 95's. The 93's and early 94's in the US had Cup I wheels. The et 70 essentially leaves the centerline of the wheel/tire in the exact same place as the OE 7.5" on the GTS's, while giving a wider tire option. There are probably only a few dozen sets of these in the US!! They were original "winter" rear wheel on 911's that were going to northern Europe, and a few in Canada, northern US. I searched 2 years for the first set, and have obtained two other sets of 8" et 70's in the past 4 years. Kept the first set for my GTS, sold the second set, and found the third set this winter.
The 8" ones are for sale, but aren't "cheap" like the 7" et 50's that were on the fronts of the 911's are!!
Cheers,
Gary Knox
First, going to a 10 mm narrower tire will only remove 5 mm of the width on the outside. The other 5 mm reduction is on the inside.
IF you decide to go to the Cup II wheels like were on the GTS, you'll have difficulty finding any front wider than the 7" that was on the 911's. The 7.5" et 65 17" fronts were on '93 GTS's and on some 968's, but are very rare.
IF you want wider tires/rims up front, I have a set of OE Porsche 8" et 70 17" Cup II wheels that are even harder to find (and superior to the GTS ones). GTS's of course were quite rare, and the Cup II wheels were only on the later '94's and 95's. The 93's and early 94's in the US had Cup I wheels. The et 70 essentially leaves the centerline of the wheel/tire in the exact same place as the OE 7.5" on the GTS's, while giving a wider tire option. There are probably only a few dozen sets of these in the US!! They were original "winter" rear wheel on 911's that were going to northern Europe, and a few in Canada, northern US. I searched 2 years for the first set, and have obtained two other sets of 8" et 70's in the past 4 years. Kept the first set for my GTS, sold the second set, and found the third set this winter.
The 8" ones are for sale, but aren't "cheap" like the 7" et 50's that were on the fronts of the 911's are!!
Cheers,
Gary Knox
PM sent.
04-06-2012, 07:17 PM
#73
Three Wheelin'
Thread Starter
235/40/17's on and noticeably less extension. Suspension not settled yet but so far no rubbing in spirited twistys. I hope I'm in the clear. Let's see what happens as the suspension settles in. I'll be very happy if I can keep my wheels and tires. The Dunlops are fantastic BTW.
04-07-2012, 03:04 AM
#75
Addict
Rennlist Member
Rennlist Member
Both 8x17 ET70 and 9x17 ET70 Cup II are 100 times easier to find in Europe. Last week I let 9" pair slip through because I didn't want to get 7x17 pair, tires and four spacers in same deal as I don't have any use for those. There is other 9" pair available immediately locally but its probably same set I had some years ago and needs total rebuild.
Automatic GTS has 8" + 6mm spacers at front with 245 tires and 9" ET55 with 275 at back. Plan is to get 9" ET70 to front so they can take 255's.
German ebay has both 8" and 9" pairs with usual 7" pair with them for sale quite often. So they are fairly easily available in Europe if one wants to and is willing to spend $$$.
If someone wants really rare early GTS style Cup I wheels there is never used brand new pair of 8x17 ET52 available locally. These are same size as '92-93 GTS winter rear wheels. I don't have any use for them as automatic GTS came with both summer and winter sets and I can put 8" to front end and normal 9" to rear for special combination.
9.5 and wider Cup I and II are real finds. They are really difficult or almost impossible to find. Magnesium versions from 964 RS are around but price is out of this world. Its possible to weld 10-11" wheels from couple of narrower factory pairs. Have seen it done locally and its impossible to see anything was done on outside. But somehow 10.5" Cup II pair done like that is not appealing at all.
Automatic GTS has 8" + 6mm spacers at front with 245 tires and 9" ET55 with 275 at back. Plan is to get 9" ET70 to front so they can take 255's.
German ebay has both 8" and 9" pairs with usual 7" pair with them for sale quite often. So they are fairly easily available in Europe if one wants to and is willing to spend $$$.
If someone wants really rare early GTS style Cup I wheels there is never used brand new pair of 8x17 ET52 available locally. These are same size as '92-93 GTS winter rear wheels. I don't have any use for them as automatic GTS came with both summer and winter sets and I can put 8" to front end and normal 9" to rear for special combination.
9.5 and wider Cup I and II are real finds. They are really difficult or almost impossible to find. Magnesium versions from 964 RS are around but price is out of this world. Its possible to weld 10-11" wheels from couple of narrower factory pairs. Have seen it done locally and its impossible to see anything was done on outside. But somehow 10.5" Cup II pair done like that is not appealing at all.
Last edited by Vilhuer; 04-07-2012 at 03:20 AM.