Evo VIII Brakes on my 2g

[gixxerdrew]

rota boost that were meant for evo fitment. 17x8 35 offset. I am no longer using those wheels/spacers so I cant comment on long term.

 

[GPTourer]

People keep throwing around offset as they deciding factor, but it is backspacing that determins how much room you have for big brakes. Any wheel designed for an Evo will take this into consideration.

 

[Scrymerr]

People keep throwing around offset as they deciding factor, but it is backspacing that determins how much room you have for big brakes. Any wheel designed for an Evo will take this into consideration.

No, this is not true and you are wrong. Backspacing essentially measures the same thing as offset: where the bolting surface of the rim is relative to the wheel. Whereas offset is measured from the centerline of the rim, backspacing is measured from the inner edge of the rim. In reality, neither measurement can be used to definitively determine a given rims compatibility with certain brakes, but they are usually pretty good indicators. For a given offset generally a wider wheel will allow more clearance for brakes. Or, given a certain wheel width, generally less offset will allow more clearance for brakes. Offset is a more common measurement for the rims we are using, but the backspacing can easily be found knowing the width.

 

[logic]

This seems like a good time to mention these slightly more visual explanations of backspacing and offset, since there might be a few folks who don't appreciate the difference:

Mickey Thompson Performance Tires & Wheels
Tech Knowledgebase - Wheel Backspacing and Offset
https://www.rsracing.com/tech-wheel.html

You're both right, though; either backspacing alone, or offset and rim width together can give you the same information. Backspacing makes more sense to me when discussing this kind of thing, but most vendors sell rims by specifying width and offset instead.

Also, while backspacing tells you how much space you have from the lip of the rim to the hub, it doesn't say anything about how much room the spokes of your wheel allow behind them. If you're especially lucky, your wheel vendor can supply you with 100%-scale templates to print and cut out so that you don't have to play a guessing game as to what will and won't fit.

 

[gixxerdrew]

People keep throwing around offset as they deciding factor, but it is backspacing that determins how much room you have for big brakes. Any wheel designed for an Evo will take this into consideration.

I certainly didn't throw that around as a way to determine brake clearance, I threw it around as a way to identify a specific wheel and then talked about it's clearance. The only way to determine brake clearance is pretty much to ask someone with that wheel or chance wasting your money. The places that sell wheels will never measure a template for you I've asked many times. As day was saying you can use offset and width as general indicators but that's it. Evo brakes on a DSM require a LOT of spoke clearance. I'm surprised frankly that any wheels at all fit them without sticking out of the fenders.

 

[GPTourer]

No, this is not true and you are wrong.

Okay so basically you are saying I am wrong because you found a different way of saying the exact same thing I did. Got it, check.

 

[GPTourer]

I certainly didn't throw that around as a way to determine brake clearance, I threw it around as a way to identify a specific wheel and then talked about it's clearance.

And I understand that, I was just saying that offset was the only term being discussed up until this point. I am speculating here: I don't know of any other cars that use a wheel with the same offset as an Evo, but if one exists it may not necessraily have Brembos like Evos do, so some crazy spoke design that might be fine on that car, wouldn't work on an Evo. But if you specify you are looking for wheels that fit an Evo, you'll be fine because those manufacturers will be careful in the wheel's design so that it clears the factory brakes.

I have seen a couple of sites that will give you the measurement of bakspacing. I think tirerack is one of them.

 

[Scrymerr]

Okay so basically you are saying I am wrong because you found a different way of saying the exact same thing I did. Got it, check.

I am not going to argue with you because you cannot read. You said:

People keep throwing around offset as they deciding factor, but it is backspacing that determins how much room you have for big brakes.

This is a false statement- backspacing does NOT determine how much clearance you have for brakes! Additionally, you mentioned backspacing as opposed to offset as a measurement to use when in this case they are equally invaluable.

Any wheel that will fit an evo will obviously fit around the brembos when installed on a DSM- it is the same brake setup. However, you should really realize how trivial it is to mention who does and does not provide either backspacing or offset- if you know one, you know the other.

 

[GPTourer]

This is a false statement- backspacing does NOT determine how much clearance you have for brakes! Additionally, you mentioned backspacing as opposed to offset as a measurement to use when in this case they are equally invaluable.

It is not a false statement, if you understood, then you would realize the two go hand in hand, as well as wheel size. A 17" wheel with a lower offset typically has more backspacing then a 15" wheel with a higher offset.

Any wheel that will fit an evo will obviously fit around the brembos when installed on a DSM- it is the same brake setup.

Wow, really? That's what I already said.

However, you should really realize how trivial it is to mention who does and does not provide either backspacing or offset- if you know one, you know the other.

Please demonstrate this formula. Offset is almost always provided. I am curious how you determine how the wheel spokes clear a caliper with just two dimensions provided.

 

[Gamble97]

Can someone just tell my if my rims will fit Paaa paaaa pppaaaaaa ppleaseeeeeeeeeeeeee
Also can I use rear 95 vented rotors and brembo calipers?

 

[Scrymerr]

It is not a false statement, if you understood, then you would realize the two go hand in hand, as well as wheel size. A 17" wheel with a lower offset typically has more backspacing then a 15" wheel with a higher offset.

NO! Wheel diameter has NOTHING to do with offset or backspacing! I am having too much trouble explaining this to you, so I will link a picture.

As far as a formula relating the following three quantities:

-wheel width (w)
-wheel offset (o)
-backspacing (b)

b=(w/2)+o

with all units being the same. Now this formula does NOT tell you whether the wheel will fit over a caliper, it tells you backspacing! Backspacing does NOT tell you whether or not a wheel fits. I say again: backspacing is the measurement from the inboard edge of the rim to the wheel mounting surface.

Here, look at this picture.

You must be logged in to view this image or video.

 

[GPTourer]

NO! Wheel diameter has NOTHING to do with offset or backspacing!

I forgot to put "x7" or "x8" as I was referring to the overall dimenions of the wheel.

Follow this link:
57Motorsport G07WT Winning Blue Painted

I tried your formula and it did not add up to what tirerack reports to be the backspacing for this wheel.

5.62" != (7/2)+ 43mm (1.69")

Why is that?

 

[Gamble97]

Based on backspacing of a 17x7 rota subzero and 40mm offset, will it fit?

 

[logic]

Wheel diameter is not the same as wheel width, and it's pretty clear you (GPTourer) were talking about a 17" wheel vs. a 15" wheel. The 17" wheel you mentioned at Tire Rack either has an incorrect recorded backspacing, or an incorrect recorded offset; they claim the offset is 43mm, but with that backspacing, it should be 53mm, which suggests a typo to me.

And again, none of these measurements is going to tell you if a wheel will clear a particular set of brakes, because none of these measurements involve the profile of the inner rim, merely the hub mating surface (which doesn't matter for brake clearance) and the inner lip (also, doesn't matter). (They can help with determining suspension and fender clearance, but not brakes.)

Please, both of you: this is turning into a newbie e-thug argument over semantics. I subscribed to this thread to read about Evo brakes on a 2g.

Gamble: pop a wheel off, and take a few measurements to try to create a profile of the inside of your Rota rims (basically, measure from the rim lip down to the high points on the inside of the rim; just hold a straight-edge, level, or something across the inside lip as a reference point).

If I get few minutes this week or over the weekend, I'm going to swap my summer wheels onto my Evo, which means I can measure how proud the stock Brembos sit from the hub, and how far out from the center they rest. That'll give you a very rough measurement of the area of clearance you need behind your rims, which you can then match up to your rim profile. It won't be perfect, because I suspect there might be some variation between Evo spindles and the Galant spindles you'd be using, but it's about as close as you'll be able to get without actually you or someone else bolting everything together and test-fitting it.

 

[GPTourer]

Wheel diameter is not the same as wheel width,

Wow, no kidding. I already said I left off width when talking about size by accident.

Please, both of you: this is turning into a newbie e-thug argument over semantics. I subscribed to this thread to read about Evo brakes on a 2g.

There's nothing e-thuggery about my comments. I agree this is turning into semantics, which is why I don't understand why it was said I was wrong and accused of not being able to read. I want to know the answer because this does involve putting brakes on a 2G and not everyone wants stock evo wheels on their car.

 

[logic]

If I get few minutes this week or over the weekend, I'm going to swap my summer wheels onto my Evo, which means I can measure how proud the stock Brembos sit from the hub, and how far out from the center they rest.

Okay, I just swapped the wheels, and took some very rough measurements for you. The Brembo caliper is almost exactly two inches high, measured from the hub (approximation, as I didn't remove the rotor, but it's about as close as you're going to get). Measured from the center of the axle, the outer edge of the caliper is approximately 6.75 out, with the tallest (2" high) portion spanning from about 4 inches to 6.5 inches out from the center of the axle. So, that 4.0-6.5" area away from the center of the axle needs about 2" of clearance away from the hub for this to clear.

I did not measure the rear caliper clearance. If you have rims that don't clear, may I suggest having them melted down?

I should mention that these calipers just barely clear the stock MR wheels, and even my ProRace 1.2s (17x9+27) only leave a 1/4" or so of room. Also, I'll note again that this is relative to the Evo spindle; I don't expect the Galant spindle to necessarily be any different, but it's something to consider.

Hope this helps!

 

[Scrymerr]

I forgot to put "x7" or "x8" as I was referring to the overall dimenions of the wheel.

Follow this link:
57Motorsport G07WT Winning Blue Painted

I tried your formula and it did not add up to what tirerack reports to be the backspacing for this wheel.

5.62" != (7/2)+ 43mm (1.69")

Why is that?

Well, you need to look at the picture I posted. Wheel width is measured betwee the bead lips. Backspacing is measured from the inside lip of the rim. If you use the nominal width (bead lip to bead lip), you will get screwy conversions. Generally the actual wheel width is just under an inch more.

This will give you a backspacing of 5.69", or .07" off if you add an inch to the nominal width.

 

[Poloturbo]

Sorry to bring this up but heres my question:

I have on my car the Cobra BBK with custom brackets my question is do I need to purchased back my old 2G brackets to fit the evo8 brembos? I know I need the JDM knuckles but does the "Cobra" or Baer(the same) brakets fits?

thanks for your help

 

[Gamble97]

Sorry to bring this up but heres my question:

I have on my car the Cobra BBK with custom brackets my question is do I need to purchased back my old 2G brackets to fit the evo8 brembos? I know I need the JDM knuckles but does the "Cobra" or Baer(the same) brakets fits?

thanks for your help

Not sure, but I would want your cobra brakes

 

[Flash]

Once you get the JDM Galant knuckles there is no way to reinstall brakes that once worked on the 2g knuckles. You will have to run the Evo Brembo brakes or a brake kit made for the Evo. Also, you won't need to worry about purchasing back your 2g brackets to 'fit the Evo brakes. One the Evo brakes the bracket is already part of the caliper. I hope that answers your question.
Here is a picture to show the differences, I think this thread was lacking this picture already, so I'll post it. Left is the stock 2g knuckle, on the right is the JDM Galant knuckle.

You must be logged in to view this image or video.

 

[Poloturbo]

Thanks for the reply Flash, VERY good info and with pictures, it helps a lot.

Would you think it's an upgrade over my Cobra kit or about the same braking power?
Always thought 4 pistons and better bias front/rear would do a better job over the CObra kit.
I'ts been flawless since day one and great track setup but I'm thinking a bit more....

Anybody tried to 2 of them?

 

[DSMunknown]

http://www.dsmtuners.com/forums/151722851-post8.html

 

[Talon tsi PR]

I want opinions on this i have a set of brembo calipers from a evo viii and im trying to make them fit in my 91 Talon, but the thing is one of the holes in the caliper doesn' line up but my friend happens to be a fabricator told me that he can made a adapter for the calipers is this a good idea?

 

[95blackGsTurbo]

On a 2g yes it can be done by swapping on the Galant knuckles. With the 1g though no one has done it to my knowledge and searching. If you feel safe with having him fabricate the parts for you and they fit then by all means do so and be sure to document what you guys are doing.

 

[MLutin]

I'm def interested in this. Keep me posted.