Cornwall-Bow Posted February 16, 2021 Share Posted February 16, 2021 Hello guys, I'm after some advice on a set of wheels I'm looking atm. Just curious about weather they will fit my JDM 2004 350z (standard OEM suspension) without any rubbing, horrendous ride quality or problems over speed bumps. Dose anyone else have similar wheels and have any problems? The specs for the wheels are: Fronts = 8.5" ET 33 Tyres are Goodyear eagle F1 235/35 19. 6mm Tread. Rears = 9.5" ET35 Tyres are Goodyear eagle f1 265/30 19. 3mm Tread. Thanks in advance! 1 Quote Link to comment Share on other sites More sharing options...
msitpro Posted February 16, 2021 Share Posted February 16, 2021 On the front you'll have approx. 6.5mm more arch gap and 6.5mm less ground clearance (lower) On the rear you'll have approx. 18mm more arch gap and 18mm less ground clearance (lower) Pros - Lower centre of gravity Stiffer sidewall for flatter cornering Size and offsets of the wheels are very close to OEM so fitment is fine Cons - Thinner sidewall for less comfort (~30% smaller!) Less ground clearance. The biggest problem is the ratio between the front and back. - as standard the front is slightly smaller than rear - the spec you have stated is smaller at the back. This will result in traction control cutting power at anything more than about 10mph and make the car undriveable with TC left on. Solution - change the rear tyres for a 265/35/19 size. You'll still have very slightly less ground clearance, less sidewall for comfort and slightly more arch gap though. Stock wheel/tyre heights are - 225/45/18 = 660mm 245/45/18 = 678mm Your proposed - 235/35/19 = 648mm 265/30/19 = 643mm (265/35/19 = 668mm) See here https://tiresize.com/tyre-size-calculator/ and here https://www.willtheyfit.com/index.php? 2 Quote Link to comment Share on other sites More sharing options...
Sim Posted February 16, 2021 Share Posted February 16, 2021 As above, I always use willtheyfit.com , it's great for plugging in tyre and wheel sizes to see the results. You can then jam your hand or fingers in between your arches and tyre to work out what the change will do 1 Quote Link to comment Share on other sites More sharing options...
Ekona Posted February 16, 2021 Share Posted February 16, 2021 I disagree on the size differences/TC issue. The difference on both is less than 3%, the car will be happy with that and that’s not an uncommon tyre size to run when moving to 19” wheels. Spot on about the lack of sidewall causing comfort problems though, plus the car will likely be slower and handle noticeably poorer given the usual increase in unsprung mass that moving to larger wheels normally entails. 2 Quote Link to comment Share on other sites More sharing options...
Cornwall-Bow Posted February 16, 2021 Author Share Posted February 16, 2021 (edited) Thanks very much for the advice guys, really appreciate the detailed write ups! I'll keep looking, as I'm running 17's with the factory OEM JDM wheels should I just look for some nice 18's so I don't have such a big trade off with ride quality? Or would you guys still recommend 19's? Edited February 16, 2021 by Cornwall-Bow 1 Quote Link to comment Share on other sites More sharing options...
msitpro Posted February 16, 2021 Share Posted February 16, 2021 1 hour ago, Cornwall-Bow said: Thanks very much for the advice guys, really appreciate the detailed write ups! I'll keep looking, as I'm running 17's with the factory OEM JDM wheels should I just look for some nice 18's so I don't have such a big trade off with ride quality? Or would you guys still recommend 19's? Ahh I forgot about the 17" option. So they are 658 and 668mm tall. If you really like those wheels and/or they're a great price then maybe go 225/40/19 and 245/40/19 which are 663 and 678mm tall. The taller the combo, the better aesthetically it'll look as there will be reduced/minimal arch gap, without compromising on ground clearance which can be an issue. You could then drop the car on -20mm springs for example and still be close to stock ground clearance and have almost zero arch gap. You'd move down from a 50 profile tyre as OEM size is 225/235/50/17 to 40 profile, which will look 'sportier' and have less roll, while still maintaining decent comfort. 1 Quote Link to comment Share on other sites More sharing options...
Cornwall-Bow Posted February 16, 2021 Author Share Posted February 16, 2021 58 minutes ago, msitpro said: Ahh I forgot about the 17" option. So they are 658 and 668mm tall. If you really like those wheels and/or they're a great price then maybe go 225/40/19 and 245/40/19 which are 663 and 678mm tall. The taller the combo, the better aesthetically it'll look as there will be reduced/minimal arch gap, without compromising on ground clearance which can be an issue. You could then drop the car on -20mm springs for example and still be close to stock ground clearance and have almost zero arch gap. You'd move down from a 50 profile tyre as OEM size is 225/235/50/17 to 40 profile, which will look 'sportier' and have less roll, while still maintaining decent comfort. Yeah kinda love how the 17's feel on our gloriously bumpy B roads but they definitely look undersized and I feel that bigger would be better. Fair play really appreciate the information, probably won't change the suspension, but I'm definitely leaning towards some 18's as they're that little bit cheaper. Quote Link to comment Share on other sites More sharing options...
Ekona Posted February 16, 2021 Share Posted February 16, 2021 Just get a set of OEM Rays, you won’t get a better wheel without spending daft money 2 Quote Link to comment Share on other sites More sharing options...
Cornwall-Bow Posted February 16, 2021 Author Share Posted February 16, 2021 5 minutes ago, Ekona said: Just get a set of OEM Rays, you won’t get a better wheel without spending daft money Think you're right there, some are going for bargain prices 1 Quote Link to comment Share on other sites More sharing options...
Sim Posted February 18, 2021 Share Posted February 18, 2021 On 16/02/2021 at 20:11, Cornwall-Bow said: Think you're right there, some are going for bargain prices You could get 370Z rays for reasonable money at 19" as another option? 1 Quote Link to comment Share on other sites More sharing options...
ShortPaul Posted February 18, 2021 Share Posted February 18, 2021 On 16/02/2021 at 20:04, Ekona said: Just get a set of OEM Rays, you won’t get a better wheel without spending daft money Depends on what rays we are talking about, rays wheels can get pricey 1 Quote Link to comment Share on other sites More sharing options...
Ekona Posted February 18, 2021 Share Posted February 18, 2021 I would’ve thought OEM Rays posted in the 350 section would be obvious enough 1 Quote Link to comment Share on other sites More sharing options...
Cornwall-Bow Posted February 18, 2021 Author Share Posted February 18, 2021 Kinda fancied something a little different look wise from the OEM 350 rays, I like these: https://www.ebay.co.uk/itm/ALLOY-WHEELS-18-CRUIZE-GTO-BP-BLACK-POLISHED-STAGGERED-CONCAVE-5X114-3-18-INCH/184293230940?_trkparms=aid%3D777008%26algo%3DPERSONAL.TOPIC%26ao%3D1%26asc%3D20201018205123%26meid%3D23f84f80aa034889b465e8fc3d1415a9%26pid%3D101286%26rk%3D1%26rkt%3D1%26mehot%3Dnone%26itm%3D184293230940%26pmt%3D0%26noa%3D1%26pg%3D2380057%26algv%3DWatchlistVariant&_trksid=p2380057.c101286.m47999&_trkparms=pageci%3Aae808cf9-7212-11eb-88f8-a212fb255ab0|parentrq%3Ab649995d1770acc6e182cb08ffd8a390|iid%3A8 But was kinda just hunting around for something that came with a set of tyres on Quote Link to comment Share on other sites More sharing options...
Ekona Posted February 18, 2021 Share Posted February 18, 2021 Just be aware of the weight and construction of cheaper wheels, you may find they’re an awful lot heavier than you think. Quote Link to comment Share on other sites More sharing options...
ShortPaul Posted February 18, 2021 Share Posted February 18, 2021 1 hour ago, Ekona said: I would’ve thought OEM Rays posted in the 350 section would be obvious enough 1 Quote Link to comment Share on other sites More sharing options...
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