Infiniti Q50 Forum banner
1 - 15 of 15 Posts

·
Registered
Joined
·
14 Posts
Discussion Starter · #1 ·
Hi,
I am thinking about buying new tires. I have a Q50 Hybrid RWD (4x OEM 19 ”- 8.5J). Will 2x 255/40 for the rear and 2x 245/40 for the front be OK?
Maybe better will be just 245/40 or 255/40 around for summer?

If not, what do you recommend? Which set will be the best for winter and which set for summer?
 

·
Registered
Joined
·
499 Posts
245/40/19 is all around will be the best choice since you’ll be able to rotate them as well. You can also do 255/40/19 all around as well but the tire will be just a little thicker without the low profile look of the 245/40/19 which has a smaller sidewall.

On my Hybrid I run 245/40/19 in the front and 275/35/19 in the rear and its by far the best combination that you can run for the hybrid that’s within factory specifications. Especially for the rear which has all the torque the wider tires help grip the road much better and they don’t slip. I have the Nismo V1 rims with the OEM specs being 19x9.5 40 offset all around.
 

·
Registered
Joined
·
14 Posts
Discussion Starter · #4 ·
245/40/19 is all around will be the best choice since you’ll be able to rotate them as well. You can also do 255/40/19 all around as well but the tire will be just a little thicker without the low profile look of the 245/40/19 which has a smaller sidewall.

On my Hybrid I run 245/40/19 in the front and 275/35/19 in the rear and its by far the best combination that you can run for the hybrid that’s within factory specifications. Especially for the rear which has all the torque the wider tires help grip the road much better and they don’t slip. I have the Nismo V1 rims with the OEM specs being 19x9.5 40 offset all around.
So, maybe 255/35 around? What u think?
 

·
Super Moderator
Murrieta, CA, USA
Joined
·
7,761 Posts
If your OEM size is 245 40 19, then the green zone below is your ideal selection zone. It basically leaves you only with 245 or 255. 255 will work but note that 8.5" rim width is on the low end of ideal. You'll see some bulge. Also, your odo and speedo will be off by 1.1%. When your speedometer says you are going 70, you'll actually be going 1.1% faster at 70.8 mph.



Rectangle Font Parallel Number Screenshot
 

·
Premium Member
2018 Q50 Red Sport 400 AWD
Joined
·
6,514 Posts
It seems to me that the manufacturer would install the "best" tire size for a given application based on vehicle gearing, maximum gross weight, wheel size, region of sale, wheelhouse clearances, suspension calibrations, and intended use of the car. Note that I said best "size" like the thread title, not the best tire.
 

·
Super Moderator
Murrieta, CA, USA
Joined
·
7,761 Posts
It seems to me that the manufacturer would install the "best" tire size for a given application based on vehicle gearing, maximum gross weight, wheel size, region of sale, wheelhouse clearances, suspension calibrations, and intended use of the car. Note that I said best "size" like the thread title, not the best tire.
Pill, party pooper. If we applied your logic to everything, there would be no such thing as customizing/modifying ours! ;)
 

·
Premium Member
2018 Q50 Red Sport 400 AWD
Joined
·
6,514 Posts
  • Haha
Reactions: ptatohed

·
Registered
2016 Hybrid 3.5 SportTech RWD
Joined
·
1,456 Posts
It seems to me that the manufacturer would install the "best" tire size for a given application...
And they also install the very best tires...
 

·
Premium Member
2018 Q50 Red Sport 400 AWD
Joined
·
6,514 Posts

·
Registered
2016 Hybrid 3.5 SportTech RWD
Joined
·
1,456 Posts
C'mon guys, that was clearly a joke! 😂
Seriously, I just wanted to say that manufacturers do not always put the best possible parts in new cars - often they are cheap and the best way for them to earn more. That's why many people tune...
 
1 - 15 of 15 Posts
Top