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Replace front tires only

 
Old 07-10-2019, 10:54 PM
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rcg412
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Default Replace front tires only

My mpsc2 fronts need replacement, but rears still have a quite a few days on them. Any reason can’t replace fronts and keep backs for a few more days?
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Old 07-10-2019, 11:03 PM
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You do know that wear is only one variable in this equation? Another one is heat cycles for example.
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Old 07-11-2019, 01:06 AM
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Originally Posted by rcg412 View Post
My mpsc2 fronts need replacement, but rears still have a quite a few days on them. Any reason can’t replace fronts and keep backs for a few more days?
Nope.
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Old 07-11-2019, 08:46 AM
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Originally Posted by ExMB View Post
You do know that wear is only one variable in this equation? Another one is heat cycles for example.
I have plenty of HC left. My camber is off and I eat the outer edge quicker than I heat cycle out
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Old 07-11-2019, 08:59 AM
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Frank 993 C4S
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These are street tires. I would try it out.
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Old 07-11-2019, 09:13 AM
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My car came with Dunlops. I got a puncture in one mid-way through last year and replaced the front pair with new MPSC2's. I ran like that right up until my June DE event where I finally finished off the rear Dunlops (and the motor) and seem to have worn the front Cup2's to nearly done as well.

So I just replaced the full set. It looks to me like either Cup2's wear faster than Dunlops (of which my impression is that the opposite should be true) or I tear through front tires tangibly faster than rear tires.

I'm not replacing tires that are still good to go.

Does that mean my front and rear grip is drastically out of proportion and I'm a deadly missile on the track just looking for a place to explode?

I have no idea. I'm not dead though. So... ¯\_(ツ)_/¯
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Old 07-11-2019, 10:51 AM
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Unless I am changing very a fresh front or rear because a of a puncture, I usually replace in full sets. Especially if one pair has more than a handful of heat cycles.
Otherwise you are just going to do the unbalanced Fresh VS. EOL tire tango indefinitely.
Better to run equally fresh rubber front and rear and get consistent handling than stretch a few more cycles out with less than optimal front/rear tires characteristics.

If your fronts are especially worn - consider alignment and / or driving style as a factor. Rears do take a lot of abuse from powering out of turns which may not be apparent in visible wear.

If your fronts are beat up faster than you think they should - look to why this is happening. Often alignment, but sometimes driving style as well.

Also - Learn to use the finger nail test for tacky / hardness. Try to have a new tire test for a good comparison.

All other comments here are equally valid. The above is merely my own humble opinion.
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Old 07-11-2019, 11:00 AM
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Thanks for that.
Now that I'm starting with a full set of the same tires again, I'll be able to gauge the wear much better. The puncture really threw a wrench in things last year. They weren't even half done yet.

Still though... at my mediocre level of talent, the completely mismatched tires didn't seem to have an obvious impact.
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Old 07-11-2019, 11:15 AM
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I am Trying the same thing but I had to change tire sizes as well... (Tire rack didn't have the size I wanted when I initially purchased) My Fronts were Gone on the outside, So I Tossed the Fronts,(225s) moved the Rears to the Front (255's) (they wore pretty even) and purchased a wider set for the rear.(275s) Then Added more negative camber to the front) I'm going to nelson ledges next which is a tiny track with a pourus surface and it really beats up on front tires, So I will finish them off there and get fresh ones for the front after that.. If I was Racing... Yes always 4,, DE well.... I guess I go a little slower..
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