Nliiitend1
Member
What's the hub bore size? It has to be at least 67.1 mm to fit over the MS3's hubs (assuming it hasn't changed since the 1st gen - which it likely hasn't). If it's smaller, it would have to be machined to a larger size...
07-09 vs 2010 MS3 brakes/rims?
- Thread starter Stavesacre21
- Start date
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
Looking for it as we speak...
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
Looks like 66.1
really glad I ran it by you guys first...saved me a 2 hour drive, $350, and a lot of headaches.
really glad I ran it by you guys first...saved me a 2 hour drive, $350, and a lot of headaches.
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Nliiitend1
Member
No problem. 
Actually, the 2010 has 12.6 on the fronts. the rear is smaller, but i dont recall the exact size.
Nliiitend1
Member
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
Sounds like I finally got something that seems both reasonable and priced fairly for winter rims.
Found a set of 17" Mazda 6 rims...think they'll clear the brakes?
Rims are 17x7
offset is 60mm
tires are 215/50/17
Looking at the rim sizes of stock 18x7.5 vs. M6 17x7 while taking in offset difference (MS3= 50mm vs M6= 60mm), there should still be almost 2.4mm left before you'd be past the original rim specs to extending inward and almost rubbing the fender walls. Do you think the 10mm difference will make the rims look goofy and sitting inward of the fenders too much?
Any thoughts are welcome guys
Found a set of 17" Mazda 6 rims...think they'll clear the brakes?
Rims are 17x7
offset is 60mm
tires are 215/50/17
Looking at the rim sizes of stock 18x7.5 vs. M6 17x7 while taking in offset difference (MS3= 50mm vs M6= 60mm), there should still be almost 2.4mm left before you'd be past the original rim specs to extending inward and almost rubbing the fender walls. Do you think the 10mm difference will make the rims look goofy and sitting inward of the fenders too much?
Any thoughts are welcome guys
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Nliiitend1
Member
It might look a little odd, but it should work without causing clearance issues, given that the spoke design allows for clearance with the caliper. Do you have a pic of the wheels in question? I think I've seen a few pictures of MS3s with 17" Mazda 6 wheels on them, so my initial instinct is to say they'll probably work...
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
Obviously this isn't the ACTUAL rim, but it's the same style and size:
According to the online rim calculator, this would be a 4mm stretch inward vs. the stock 18x7.5. Hope that isn't enough to rub on either the fender or the struts. Doesn't look to be.
That calculator also says the the Mazda6 rim will be recessed 16mm after figuring in offset and rim size. crossin my fingers, but I can't pass up $90 for a set of 17" Mazda6 rims without any damage but very minor rash (which i don't care about on winter rims).
Thanks for the help so far guys.
According to the online rim calculator, this would be a 4mm stretch inward vs. the stock 18x7.5. Hope that isn't enough to rub on either the fender or the struts. Doesn't look to be.
That calculator also says the the Mazda6 rim will be recessed 16mm after figuring in offset and rim size. crossin my fingers, but I can't pass up $90 for a set of 17" Mazda6 rims without any damage but very minor rash (which i don't care about on winter rims).
Thanks for the help so far guys.
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
awesome....now i'm just gonna cross my fingers when it comes to the brakes/offsets being similar. If anything, the 07-09 MS3 rim offset was supposed to be 52.5mm BUT was a 7" wide rim while the 2010 is a 50mm with a 7.5" rim. Sounds like the numbers seems almost the same.
Well have to wait and see. For that deal, i could almost resell them for a profit if they don't fit right.
Well have to wait and see. For that deal, i could almost resell them for a profit if they don't fit right.
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
Ok, well i've got some results to bring back, and a new set of questions now.
Got the rims home, and threw one on just to see how clearance is. Calipers clear around the diameter of the wheel with ease with more then an inch. However, the big shocker comes with outward clearance. I measured a mere 4mm of clearance between the calipers outward (fender) side to the inner side of the rims.
The $1,000,000 question...do the calipers EVER move outward in relation to the rims? I mean at all...through vibration, bumps, braking, release, anything. Clearly, 4mm of clearance isn't enough room to have almost any flex. I know that rims don't normally move much in relation to the calipers, but I've got almost 0% room for error here. Have you guys ever had rims come close?
I took some pics to illustrate my findings:
The wheel with it's relation to the calipers:
Now for some ideas of how close the fender side of the calipers are to the rim:
To show what the offset has done, here's a comparison of the original rim with tire to the offset created by the 8mm difference from 52 to 60:
what do you guys think? should I be worried about this? I haven't bought tires for these rims yet, so it's not too late to abandon ship if really need be.
Got the rims home, and threw one on just to see how clearance is. Calipers clear around the diameter of the wheel with ease with more then an inch. However, the big shocker comes with outward clearance. I measured a mere 4mm of clearance between the calipers outward (fender) side to the inner side of the rims.
The $1,000,000 question...do the calipers EVER move outward in relation to the rims? I mean at all...through vibration, bumps, braking, release, anything. Clearly, 4mm of clearance isn't enough room to have almost any flex. I know that rims don't normally move much in relation to the calipers, but I've got almost 0% room for error here. Have you guys ever had rims come close?
I took some pics to illustrate my findings:
The wheel with it's relation to the calipers:
Now for some ideas of how close the fender side of the calipers are to the rim:
To show what the offset has done, here's a comparison of the original rim with tire to the offset created by the 8mm difference from 52 to 60:
what do you guys think? should I be worried about this? I haven't bought tires for these rims yet, so it's not too late to abandon ship if really need be.
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Nliiitend1
Member
Well, the only way they would move out would be if you had more pad material on your pads. Furthermore, that outermost perimeter section of the caliper is fixed in relation to the wheel. It's only the inner section (the part that houses the piston and pads) that moves.
Seeing as how your car is brand new and the brake pads are at about their maximum thickness, you shouldn't have a problem. There should not be anywhere near 4 mm of "flex" in the system as it stands, so I think you're fine.
I've had similar clearances between brake pads and calipers before, and while that's getting about as close as I'd feel comfortable with, it's certainly doable.
Seeing as how your car is brand new and the brake pads are at about their maximum thickness, you shouldn't have a problem. There should not be anywhere near 4 mm of "flex" in the system as it stands, so I think you're fine.
I've had similar clearances between brake pads and calipers before, and while that's getting about as close as I'd feel comfortable with, it's certainly doable.
Nliiitend1
Member
Just don't get 7" wide wheels with anything MORE than a ~+60mm offset and you'll be fine.
My winter wheels are +44 mm 17"x7" Ford Fusion alloys, and they work splendidly.
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
Well that's good to hear about the brakes. I figured i'd be good but just wanted to double check on it.
On to the next phase...tires are on the way within the end of the week. Looks to be the final step in question...if the 215/50/17 tires are gonna rub any of the suspension or the fenders. According to the wheel offset calculator, there should only be 2mm less clearance from the strut housing compared to stock, but does that only figure rims, or does it take into account the tires that go on the rim?
You guys have been a huge help so far. Thanks again for the info.
On to the next phase...tires are on the way within the end of the week. Looks to be the final step in question...if the 215/50/17 tires are gonna rub any of the suspension or the fenders. According to the wheel offset calculator, there should only be 2mm less clearance from the strut housing compared to stock, but does that only figure rims, or does it take into account the tires that go on the rim?
You guys have been a huge help so far. Thanks again for the info.
Nliiitend1
Member
I think the one you're using only takes into account the wheel...
I prefer this calculator:
http://www.wheelsmaster.com/rt_specs.jsp
It allows you to put the tire and wheel sizes in.
Regardless, I think you're going to be just fine.
I prefer this calculator:
http://www.wheelsmaster.com/rt_specs.jsp
It allows you to put the tire and wheel sizes in.
Regardless, I think you're going to be just fine.
Stavesacre21
Member
- :
- 2010 Mazdaspeed3
WOW, that's an awesome calculator you have there! Pretty much answered all of my questions! Thanks!
as for the question asked, a smaller total diameter (across the wheel and tire) WILL make a difference, thus making the circumference also smaller. Use that calculator that Niiiitd1 to confirm how much.
Think about the simple math of it...a smaller wheel completes a rotation faster then a larger wheel traveling the same speed next to each other. If you check a speedo on both tires that are calibrated for the larger tire, it will read that the smaller tire is going faster then it actually is...because its figuring for a larger total circumference to complete the rotation...which is obviously going to happen faster if your working with a smaller tire. Make any sense?
That said above, it will affect your odometer, but depending on how much smaller your wheel is will determine how quickly your miles become inaccurate. If your speedo is reading 1MPH faster @ 60MPH, then in 60 miles, you'll have gained an extra 1 mile on your odometer that you're car didn't actually travel. You could see how really small tires throwing you off 5MPH could add up quickly over 10s of 1000s of miles. If you get a LARGER tire/rim combo then your speedo is calibrated for, then your not going to be putting on as many miles as you actually have.
The part that's been tough to figure that i've been eating away at is when you not only throw in different wheel sizes, but also a different offset, tire profile and tire thickness. Suspension has been a concern of mine but it looks like it'll work out since i've only got about 1-3mm of extra tire/rim on the inside of the well.
as for the question asked, a smaller total diameter (across the wheel and tire) WILL make a difference, thus making the circumference also smaller. Use that calculator that Niiiitd1 to confirm how much.
Think about the simple math of it...a smaller wheel completes a rotation faster then a larger wheel traveling the same speed next to each other. If you check a speedo on both tires that are calibrated for the larger tire, it will read that the smaller tire is going faster then it actually is...because its figuring for a larger total circumference to complete the rotation...which is obviously going to happen faster if your working with a smaller tire. Make any sense?
That said above, it will affect your odometer, but depending on how much smaller your wheel is will determine how quickly your miles become inaccurate. If your speedo is reading 1MPH faster @ 60MPH, then in 60 miles, you'll have gained an extra 1 mile on your odometer that you're car didn't actually travel. You could see how really small tires throwing you off 5MPH could add up quickly over 10s of 1000s of miles. If you get a LARGER tire/rim combo then your speedo is calibrated for, then your not going to be putting on as many miles as you actually have.
The part that's been tough to figure that i've been eating away at is when you not only throw in different wheel sizes, but also a different offset, tire profile and tire thickness. Suspension has been a concern of mine but it looks like it'll work out since i've only got about 1-3mm of extra tire/rim on the inside of the well.
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