bytespc Posted June 15, 2016 Share Posted June 15, 2016 Hello peeps......as a lot of you will know I just suffered what could have been a catastrophic puncture / tear in a rear tyre and having had no input into what they where ( two years ago new wheels came with ) I took the opportunity to replace them both with Dunlop Maxx SP GT and boy what a difference, they where expensive ( eyes watering ) but they have single handedly transformed the rear of the car, now to the reason for my post.....I'm trying to find the same tyre for the fronts in 245/35/20 but they don't seem to be made ?, 255/35/20 is readily available but surely 255 front and 275 rear with throw out the traction control ? Anywho just thought I'd throw this out there for comment / advice Quote Link to comment Share on other sites More sharing options...
StevoD Posted June 15, 2016 Share Posted June 15, 2016 if your going to run 255/35/20 and 275/35/20 you should be fine i have ran the same ratio be it 18" last year with out issue 1 Quote Link to comment Share on other sites More sharing options...
bytespc Posted June 15, 2016 Author Share Posted June 15, 2016 Thanks StevoD....did it effect the speedo calibration ? Quote Link to comment Share on other sites More sharing options...
StevoD Posted June 15, 2016 Share Posted June 15, 2016 Yes but not massively i think at 60mph on speedo my GPS was saying 63/64mph 1 Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 5, 2016 Author Share Posted October 5, 2016 Hi peeps, is anyone running a 255 35 20 on the front of there Z and if so did you have to roll the arch ? Thanks in advance Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 5, 2016 Share Posted October 5, 2016 (edited) On what offset rim? Whatever rim it is, you're gonna want a 30 not a 35. The 35 will make your clearance problems much worse and is 4% bigger than stock diameter (your speedo will read notably SLOW, so you'll be breaking the law without realising it, etc (assuming you stick to the rule of having a 1-3% larger rear to avoid traction control issues)). 255 30 20 is almost bang-on stock diameter. Edited October 5, 2016 by Aashenfox Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 5, 2016 Author Share Posted October 5, 2016 Sorry ..StevoD has already answered this on another thread. Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 5, 2016 Share Posted October 5, 2016 Er....ok. Where is this thread? Quote Link to comment Share on other sites More sharing options...
StevoD Posted October 5, 2016 Share Posted October 5, 2016 Sorry ..StevoD has already answered this on another thread. did i Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 5, 2016 Author Share Posted October 5, 2016 Sorry ..StevoD has already answered this on another thread. did i You did...thanks Sent from my SM-G925F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 5, 2016 Share Posted October 5, 2016 So Stevo, can I assume that you agree with my above assessment? Nice to meet you by the way, love the neons. Quote Link to comment Share on other sites More sharing options...
StevoD Posted October 5, 2016 Share Posted October 5, 2016 i could fall into a trap now at the current time my mind is saying run 255/30/18 And thanks on the Neons Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 5, 2016 Author Share Posted October 5, 2016 http://www.350z-uk.com/topic/109322-tyres/ Quote Link to comment Share on other sites More sharing options...
GMballistic Posted October 5, 2016 Share Posted October 5, 2016 Sorry ..StevoD has already answered this on another thread. Threads merged. Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 5, 2016 Share Posted October 5, 2016 Thanks GM. So yeh, bytespc, as I explained and StevoD acknowledges, you don't really wanna be going 4% over diameter on 20s. Especially since you were asking about arch clearance, which will be zero with a 35 on a 20 rim if you are lowered at all. The thing about going over diameter and the speedo calibration is that now the speedo reads slow. OK it's only a little, but it only needs to be 1mph out to cause you to trip a speed camera. You'll have to remember to do 57 in 60 zones, 66 in 70 zones, etc. This is why you'll often see people UNDER diameter, but rarely over. Enlarging overall wheel diameter also increases the strain on the drivetrain by a small amount that over thousands of miles would take its toll. Just as increasing the length of a lever gives you a better chance to snap a bolt. Now that I've been able to read your original post. I can tell you what tires you should buy... 255 30 20 and 275 30 20. This will give you a close to ideal ratio front/rear of 2% that the traction control will like, and be less than half a percent outside stock spec overall meaning your speedo will be as inaccurate as it was when it rolled out of the factory. Now tell me the offsets of your rims and how low you are and someone can give you a clue about the extent of any arch work you may need to fit them...if any. HTH. Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 6, 2016 Author Share Posted October 6, 2016 OK so stock height , been running 35 profile on the rear for over 2 years my ownership , previous owner had 20's as well with same size tyres no issues, had 30 profile on the front ( came with the rims, no choice supplied by garage, no idea of offsets , they fit Brembos with no spacers ) like driving on concrete blocks hence the change to 35 profile. Phew thanks for all the input guys, the tyre place that's ordered the tyres Dunlop SportMax 2 to match the rears seem's to think I won have any issues , I've got a headache Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 6, 2016 Author Share Posted October 6, 2016 (edited) note : Horsham Dev when in for service earlier this year made a comment along the lines of " bloody hell mate those fronts are rubber bands must be an awful drive " Edited October 6, 2016 by bytespc Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 6, 2016 Share Posted October 6, 2016 If the tyre guy says its ok and you're stock height, I'm sure you'll be fine. I can certainly understand not wanting to roll on bricks (30s). If you wanna roll on 20"s, you gotta pay the price. Baller. Any chance of a pic of this car on 20s? Cheers Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 6, 2016 Author Share Posted October 6, 2016 On 30 front 35 rear 1 Quote Link to comment Share on other sites More sharing options...
Aashenfox Posted October 6, 2016 Share Posted October 6, 2016 Nice rims. 2 Quote Link to comment Share on other sites More sharing options...
bytespc Posted October 6, 2016 Author Share Posted October 6, 2016 Nice rims. That was two years ago...will post pic on Monday after a valet with the new 35 profile fronts on. Sent from my SM-G925F using Tapatalk Quote Link to comment Share on other sites More sharing options...
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