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Originally Posted by Ashen98
So, on the suggestions of another member and my wife completely agreeing with the lack of stopping power in her Alero. I went digging and found info here on the forums to swap the brake system for that of a 98 Camaro/GXP. Then I noticed I need bigger than the stock 15 wheel, while this makes us super happy and I have already picked out the set and style we want "Motegi MR7"...What is stumping me and I cannot seem to locate this on the forum either due to not knowing how to find it or it possibly not being here. How does one resolve the speedometer being off after switching to bigger wheels and tires???
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It's not just 98. You can use the front caliper and caliper bracket from a Camaro built as early as 93 or as late as 2002. The overall design didn't change, but I would just go to the parts counter and ask for the 2002 brakes unless you get them from a junkyard, then its' a different story. You can also do C5 Corvette front brakes, the main difference is that they have cooling fins and are made of a different material which makes them lighter and more solid or something to those lines.
Also, you can google "tire diameter calculator" and you can see how much your speedo will be off with bigger tires. The 3 general rules of upgrading to bigger wheels is that for every plus size the wheel goes, you have to lower the sidewall. If you want wider wheels, you have to lower the sidewall for every plus size you go wider, so if you have 225/60/16, combination and want 245s on your 16s, you have to downgrade to 50s or 45s to keep the diameter the same. Finally, be aware of your stock offset. If you have an offset of 42 on 15 inch tires, it is not the same on an 18 inch tire despite having the same offset. Take for example my Cutlass... It comes with a 16 inch rim with a 42mm offset (or 45 i dont remember). It is not the same as a 18 inch offset with 42mm and thus will hit my caliper. Interestingly enough, the Mustang's 21mm offset fits perfects if they are 18's. These are just things to be aware of, especially offset as it is often overlooked. If you can test fit the wheels, do so!