Jump to content
The mkiv Supra Owners Club

9J rim what's the widest tyre you could fit


Ryan.G

Recommended Posts

Fat or thin? The question of contact patches and grip.

 

Fat tyres look good. In fact they look stonkingly good. In the dry they are mercilessly full of grip. In the wet, you might want to make sure your insurance is paid up, especially if you're in a rear-wheel-drive car. Contrary to what you might think (and to what I used to think), bigger contact patch does not necessarily mean increased grip. Better yet, fatter tyres do not mean bigger contact patch. Confused? Check it out:

 

Highly contradictive as earlier in is his preach he rages that there is no need for wider tyres because they dont increase performance...lots of good info gathered until this part

Link to comment
Share on other sites

He is basically slating wide tyres...or wider tyres, his example of;

 

http://www.carbibles.com/images/contactpatch1.gif

 

Is misguiding as cars are rarely an even weight on all fours,

 

in his theory if I use 265 instead of 285wide tyres, assuming its the same profile, I would not increase grip because my load weight has not increased...and then even if my load weight does increase i.e under speed I would be losing traction anyway as the wheels turn?

 

Why dont I slap on the minimal width of tyre then, instead of paying the extra 80odd quid per wheel if I aint gonna increase my grip?

 

p.s I have a 9.5inch rear rim on 285s, I would also stick with 265 max for a 9inch rim, but the extra 5mm either side is barely gonna make a difference

Link to comment
Share on other sites

ahhh I've heard this theory before, it's basically a misguided application of the laws of static friction.

 

What it doesn't take into account is that tyres don't entirely grip using normal rules of friction for fairly flat surfaces, they grip in a different way because roads are very coarse and irregular surfaces.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.