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MazdaSpeed 3/6 - Wheels & Tires HaveMazdaSpeed 3 - Wheels & Tires - Have a question about wheels or tires? Need a calculator to figure out offsets? We have them in here


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 Old 02-20-2015, 10:25 AM   #1
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Default Small Hubcentric Wheel Spacers

Hey everyone,
This may be a dumb question and can't seem to find the answer.

I have a set of 18x8.5 +55 wheels and looking at running either 245 35 18 or 245 40 18. I know this is going to be very close to rubbing on the inside and will likely have to run a small spacer, 3-5mm at least.
My question is, how to keep the rim hubcentric with a small spacer? I know most larger spacers have a hub ring built into the, but all small spacers I have ever seen are flat?

Who has used 3-5mm spacers?
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 Old 02-20-2015, 10:40 AM   #2
 
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I have the Jbr 5mm spacers. There is enough hub left to grab the stock wheel just fine.

If you have wheels with hub rings, it gets tricky. I have to double side tape the hub ring to the hub/spacer, then put the wheel on.

I agree with you though. I have always wanted a 5mm with the hub bump thing.
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 Old 02-20-2015, 10:54 AM   #3
 
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What is the center bore size of your wheels?
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 Old 02-20-2015, 10:56 AM   #4
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Originally Posted by Nliiitend1 View Post
What is the center bore size of your wheels?
75mm so I will need hubcentric rings as well.
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 Old 02-20-2015, 11:03 AM   #5
 
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Originally Posted by JTD View Post
75mm so I will need hubcentric rings as well.
These guys can make you custom spacers that are both hub and wheel centric:

We manufacture the best Wheel Spacers money can buy | Motorsport Tech

Not cheap, but they're quality products for sure.
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 Old 02-20-2015, 06:14 PM   #6
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I think that wheel will put even a 9.5" 235mm tire over 1" inboard, or over about 35mm. The wheel itself will inset 22mm closer, plus 13mm of tire or so.

How much room is there stock? Somebody's got to know, but I don't think I've seen a number specified anywhere for the oem tires.
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 Old 02-21-2015, 02:43 AM   #7
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Originally Posted by license2ill View Post
I think that wheel will put even a 9.5" 235mm tire over 1" inboard, or over about 35mm. The wheel itself will inset 22mm closer, plus 13mm of tire or so.

How much room is there stock? Somebody's got to know, but I don't think I've seen a number specified anywhere for the oem tires.
Great question and would love to know as I am currently guessing on the minimum spacer I will need. There seems to be a huge variance in offsets used and working.
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 Old 02-21-2015, 06:00 AM   #8
 
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Originally Posted by Nliiitend1 View Post
These guys can make you custom spacers that are both hub and wheel centric:

We manufacture the best Wheel Spacers money can buy | Motorsport Tech

Not cheap, but they're quality products for sure.
This, just got a set for my fronts with rpf1's, top notch and totally worth the price.
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 Old 02-21-2015, 07:13 AM   #9
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Originally Posted by JTD View Post
Great question and would love to know as I am currently guessing on the minimum spacer I will need. There seems to be a huge variance in offsets used and working.
Yeah, most of the offsets I've seen are lower(less positive), so it seems like more of an issue at the fender. But, many of those I've noted here have still used spacers within a wide range of 5mm-15mm too. It will ultimately matter the specific height of the tire and actual measured section width of the model of tire on that wheel width.

An example is the Michelin Pilot Super Sport, as shown on tirerack in a 245/40/18 as 25.7" tall(equal to the oem Bridgestone in the 215/45/18 size), but 9.8" wide, an actual 249mm, as measured on an 8.5" wheel, vs the stock Bridgestone tire's 8.5"(216mm) measured on the 7" wheel. Others actual size may vary a few mm too.
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 Old 02-21-2015, 08:30 AM   #10
 
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18x8.5" et55 wheels will probably require AT LEAST a 5 mm spacer, and may even need an 8-10 mm spacer (especially if you're using coilovers with a thicker than OEM strut body, as some use).

I know of people running et45 wheels of the same size with no spacers, but there isn't much room on the inside with those setups...
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 Old 02-22-2015, 10:19 AM   #11
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Originally Posted by Nliiitend1 View Post
18x8.5" et55 wheels will probably require AT LEAST a 5 mm spacer, and may even need an 8-10 mm spacer (especially if you're using coilovers with a thicker than OEM strut body, as some use).

I know of people running et45 wheels of the same size with no spacers, but there isn't much room on the inside with those setups...
Any others running high offset wheels?
I am hoping to run the smallest spacer I can so trying to make as educated guesstimate as possible for ordering spacers and hoping get it right!
Thanks for the info.
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