I noticed today that the outside edge of both front wheels are wearing significantly faster than the rest of the tire. I typically run about 40-42 psi all around. Is this the result of hard cornering? I generally don't slow down on turns. It's an All4 and the back wheels aren't worn the same way. I usually rotate tires every 5k or so.

Anything I can do, other than slowing down around corners? Would lowering springs make the problem better or worse? I never noticed this in my R53 and I drove it pretty hard too.

 

lowering springs will definately tranfer the wearing to the inside more. i would take it to the dealer, or tire shop so they can do a alignment test. uneven tire wear will waste a set of tires and cost you money you could use for something else. and dont dilly dally like i did. i had to purchase a new set of tires because i skipped the 5000 mile tire rotating once lesson learned

 

You could also try to have the alignment done and increase the negative camber in the front. This will tilt the top of each front wheel in just a little which will help with outside edge tire wear.

You also might be overdriving, which doesn't help tire edge wear.

 

my all4 does the same and i think it is from aggressive cornering

i have pirelli p7 225/45R18 summer rf tires and sport suspension

i run 42 psi front / 37 psi rear, set with a tire pyrometer and chalk

when i notice the front tire outer edge beginning to feather, i rotate the tires, front to rear

i have had the alignment checked, both at the dealer and at an independant shop whose alignment machine had the cms all4 alignment specs "built in" ... both said i am within spec

i say rotate the tires and carry on

nothing is free, hard acceleration takes fuel, aggresive cornering wears tires

i doubt i will get much more than 10,000 miles out of the p7s, they were 1/2 worn at 5,000 miles, 10/32" new tread depth, 6/32" at 5k, 2/32 done ... but all four tires are wearing evenly

scott

 

Thanks, Scott. I'm going to rotate next weekend (ran out of daylight yesterday) and do a quick visual of the struts, tie rods, etc. I suspect that it's from body roll and hard cornering. I'm still on the stock tires and otherwise they're wearing great. About 17k miles so far.

Now that I think back, the front edges looked really worn after I did autocross last year. Doing autocross again in a couple weeks, so we'll see. I'm going to have to do some suspension mods eventually. Maybe springs/control arms and a rear sway bar.

 

Have your alignment checked. It's likely that you are toe-in. If you had enough positive camber to wear out the outer rows of tire treads, your front wheels would look like a Model T.