Jump to content
SAU Community

Recommended Posts

Hey guys

Bit of a pickle here, I'm ordering some Volk GTCs for my r33 gtst series 2. Now the rears are finalised and will clear brakes (19*9.5+24) but for there's a bit of an issue wit getting the right offset for the fronts.

I'm ordering through Jesse Streeter, and I got him to ask RAYS if 19*8.5+29 Face 2 (Disk A too, which is supposed to give more clearance) would clear my front brakes. Now they replied that they have never tested it, thus cannot guarantee that it will clear.

I'm just wondering if this is just due to them being conservative, or if the offsets and spoke design are actually cutting it fine?

The offsets don't seem rediculous for an r33 gtst (i had 8.5 +22 before) but it's making me wonder if it's got more to do with spoke design?

Thanks guys

Oh, also if anyone has a 33 with gtc's, feel free to post up pics and specs :) I only seen a handful on SAU, from my haphazard searching techniques

Link to comment
https://www.sau.com.au/forums/topic/359290-brake-clearance-issue-volk-gtcs/
Share on other sites

offset will NOT affect brake clearance.

you can have a +50 or a -50 and the spoke will be the exact same distance from the calliper, it's the actual wheel that will be in a different spot.

if anything those will probably hit the UCA...

offset will NOT affect brake clearance.

you can have a +50 or a -50 and the spoke will be the exact same distance from the calliper, it's the actual wheel that will be in a different spot.

if anything those will probably hit the UCA...

this apply for all rim designs or only some, cos my eurolines dont fit the front deepdish 9+30 but with a spacer they fit so effectively altering the offset?

if im wrong i just learnt something new

Nope Hamish is right.

A spacer doesn't change the offset, it simply move the entire rim outwards. Think about it, you are in essence adding length to your hub.

The only time offset alters brake clearance is if it starts to change the spoke angle. Ie on a TE37 with a high offset the spokes are flat, however when you go to a low offset the spokes start to bend outwards.

So to answer OP's question, you will be fine. I have GTC's and they don't even come close to hitting the brakes.

gallery_35676_3285_115345.jpg

this apply for all rim designs or only some, cos my eurolines dont fit the front deepdish 9+30 but with a spacer they fit so effectively altering the offset?

if im wrong i just learnt something new

if you had your eurolines in a lower offest you would still need to use the spacer as they just have shit brake clearance.

most jap rims are available in a few differing "faces" or spoke shapes.

by adding a spacer, yes you are effectively lowering the offset and moving the whole rim outwards, but this is not indicative of factory offsets where the correct stud length is retained...

try to think of it like this:

the spokes are always in the exact same spot, no matter what offset the rim is made in, but the position of the rim will change.

this is probably easiest to imagine with something like work meisters, as they are a 3 pc rim.

they make the spokes (all exactly the same) and then simply bolt them into differing places on the rim to create different offsets

well it changes the effective offset not the fixed offset.

ie a 9 +30 with a 25mm spacer is effectively a 9+5, i know the rim structurally isnt changing but the whole mounting position is moving outward thus giving more clearence in effect.

or no?

well it changes the effective offset not the fixed offset.

ie a 9 +30 with a 25mm spacer is effectively a 9+5, i know the rim structurally isnt changing but the whole mounting position is moving outward thus giving more clearence in effect.

or no?

that is 100% correct :)

ah thought so, soo offset can be relevant to brake clearence.

either way OP should get better sizes/offsets and let his nuts hang low.

Only when talking about spacers as you are increasing the width of the hub. You aint changing anything about the wheel.

Regardless what offset he chooses it aint going to affect brake clearance unless the spoke design changes such as my TE37 example.

Only when talking about spacers as you are increasing the width of the hub. You aint changing anything about the wheel.

Regardless what offset he chooses it aint going to affect brake clearance unless the spoke design changes such as my TE37 example.

but the point is if he uses a spacer to reduce his effective then that will improve brake clearance

Hey guys

Bit of a pickle here, I'm ordering some Volk GTCs for my r33 gtst series 2. Now the rears are finalised and will clear brakes (19*9.5+24) but for there's a bit of an issue wit getting the right offset for the fronts.

I'm ordering through Jesse Streeter, and I got him to ask RAYS if 19*8.5+29 Face 2 (Disk A too, which is supposed to give more clearance) would clear my front brakes. Now they replied that they have never tested it, thus cannot guarantee that it will clear.

I'm just wondering if this is just due to them being conservative, or if the offsets and spoke design are actually cutting it fine?

The offsets don't seem rediculous for an r33 gtst (i had 8.5 +22 before) but it's making me wonder if it's got more to do with spoke design?

Thanks guys

Oh, also if anyone has a 33 with gtc's, feel free to post up pics and specs :) I only seen a handful on SAU, from my haphazard searching techniques

They would be fine, mate. I've also got 19x8.5 +5 (Face 2) at the front of my V35 coupe and there's plenty of room. Plus I asked alot of mechanics if I can upgrade to bigger brakes with these wheels, all of them said I can. :)

Good luck.

Edited by VNS 24

are you talking about factory brakes? of course they will clear. your factor wheels are like 16X7 with +35 or +40 offset and have thick spokes and still clear the puny factory brakes. and you're worried a set of aftermarket 19inch wheels won't fit? seriously? dude you could fit your brakes and a pizza dish in there.

offset will NOT affect brake clearance.

you can have a +50 or a -50 and the spoke will be the exact same distance from the calliper, it's the actual wheel that will be in a different spot.

if anything those will probably hit the UCA...

Ahh I see what what you mean. It's just the position of the "barrel" of the rim that changes....so basically, if I'm picturing it right, having a lower offset would then give more suspension clearance? As the barrel of the rim is positioned outward more? Or is that a rookie mistake? lol

Nope Hamish is right.

A spacer doesn't change the offset, it simply move the entire rim outwards. Think about it, you are in essence adding length to your hub.

The only time offset alters brake clearance is if it starts to change the spoke angle. Ie on a TE37 with a high offset the spokes are flat, however when you go to a low offset the spokes start to bend outwards.

So to answer OP's question, you will be fine. I have GTC's and they don't even come close to hitting the brakes.

gallery_35676_3285_115345.jpg

Your car's actually the inspiration for going with GTCs, looks bloody mint....don't worry, will be going a different colour tongue.gif

ah thought so, soo offset can be relevant to brake clearence.

either way OP should get better sizes/offsets and let his nuts hang low.

Yeh the reason I used those offsets was because I thought I needed to....The next offset down is 8.5 +17, extra 13mm of dish (total 55mm) biggrin.gif. The rears in B disk 9.5+24 already give 73mm of lip, which is plenty to keep me happy lol. Next one up is 9.5+12 and 86mm...

are you talking about factory brakes? of course they will clear. your factor wheels are like 16X7 with +35 or +40 offset and have thick spokes and still clear the puny factory brakes. and you're worried a set of aftermarket 19inch wheels won't fit? seriously? dude you could fit your brakes and a pizza dish in there.

Yeh that's what I thought too. The only reason I posted this was on the advice of Jesse. He got a reply back from RAYS stating that the GT-C Face 1 19x8.5J+28 (B disk) won't clear my brakes. I think this may be more to do with the spoke design (Face 1 is flat spokes, Face 2 is concave) and the fact that it was B disk, or they could've just made a calculation mistake, I don't know. Either way, rather get a few opinions first before blowing all that cash money.

Oh and thanks for the info guys, much appreciated

Ahh I see what what you mean. It's just the position of the "barrel" of the rim that changes....so basically, if I'm picturing it right, having a lower offset would then give more suspension clearance? As the barrel of the rim is positioned outward more? Or is that a rookie mistake? lol

Yes that's correct.

Your car's actually the inspiration for going with GTCs, looks bloody mint....don't worry, will be going a different colour :P

Hahaha all good man, cheers.

Post up pictures once you have them. I want to one day piss off my rears and put some deeper dish 19" on the back for the staggered look.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • And finally, the front lower mount. It was doubly weird. Firstly, the lower mount is held in with a bracket that has 3 bolts (it also acts as the steering lock stop), and then a nut on the shock lower mount itself. So, remove the 3x 14mm head bolts , then the 17mm nut that holds the shock in. From there, you can't actually remove the shock from the lower mount bolt (took me a while to work that out....) Sadly I don't have a pic of the other side, but the swaybar mounts to the same bolt that holds the shock in. You need to push that swaybar mount/bolt back so the shock can be pulled out past the lower control arm.  In this pic you can see the bolt partly pushed back, but it had to go further than that to release the shock. Once the shock is out, putting the new one in is "reverse of disassembly". Put the top of the shock through at least one hole and put a nut on loosely to hold it in place. Put the lower end in place and push the swaybar mount / shock bolt back in place, then loosely attach the other 2 top nuts. Bolt the bracket back in place with the 14mm head bolts and finally put the nut onto the lower bolt. Done....you have new suspension on your v37!
    • And now to the front.  No pics of the 3 nuts holding the front struts on, they are easy to spot. Undo 2 and leave the closest one on loosely. Underneath we have to deal with the wiring again, but this time its worse because the plug is behind the guard liner. You'll have to decide how much of the guard liner to remove, I undid the lower liner's top, inside and lower clips, but didn't pull it full off the guard. Same issue undoing the plug as at the rear, you need to firmly push the release clip from below while equally firmly gripping the plug body and pulling it out of  the socket. I used my fancy electrical disconnect pliers to get in there There is also one clip for the wiring, unlike at the rear I could not get behind it so just had to lever it up and out.....not in great condition to re-use in future.
    • Onto the rear lower shock mount. It's worth starting with a decent degrease to remove 10+ years of road grime, and perhaps also spray a penetrating oil on the shock lower nut. Don't forget to include the shock wiring and plug in the clean.... Deal with the wiring first; you need to release 2 clips where the wiring goes into the bracket (use long nose pliers behind the bracket to compress the clip so you can reuse it), and the rubber mount slides out, then release the plug.  I found it very hard to unplug, from underneath you can compress the tab with a screwdriver or similar, and gently but firmly pull the plug out of the socket (regular pliers may help but don't put too much pressure on the plastic. The lower mount is straightforward, 17mm nut and you can pull the shock out. As I wasn't putting a standard shock back in, I gave the car side wiring socket a generous gob of dialectric grease to keep crap out in the future. Putting the new shock in is straightforward, feed it into at least 1 of the bolt holes at the top and reach around to put a nut on it to hold it up. Then put on the other 2 top nuts loosely and put the shock onto the lower mounting bolt (you may need to lift the hub a little if the new shock is shorter). Tighten the lower nut and 3 upper nuts and you are done. In my case the BC Racing shocks came assembled for the fronts, but the rears needed to re-use the factory strut tops. For that you need spring compressors to take the pressure off the top nut (they are compressed enough when the spring can move between the top and bottom spring seats. Then a 17mm ring spanner to undo the nut while using an 8mm open spanner to stop the shaft turning (or, if you are really lucky you might get it off with a rattle gun).
    • You will now be able to lift the parcel shelf trim enough to get to the shock cover bolts; if you need to full remove the parcel shelf trim for some reason you also remove the escutcheons around the rear seat release and you will have to unplug the high stop light wiring from the boot. Next up is removal of the bracket; 6 nuts and a bolt Good news, you've finally got to the strut top! Remove the dust cover and the 3 shock mount nuts (perhaps leave 1 on lightly for now....) Same on the other side, but easier now you've done it all before
    • OK, so a bunch of trim needs to come off to get to the rear shock top mounts. Once the seat is out of the way, the plastic trim needs to come off. Remove 2 clips at the top then slide the trim towards the centre of the car to clear the lower clip Next you need to be able to lift the parcel shelf, which means you need to remove the mid dark trim around the door, and then the upper light trim above the parcel shelf. The mid trim has a clip in the middle to remove first, then lift the lowest trim off the top of the mid trim (unclips). At the top there is a hidden clip on the inner side to release first by pulling inwards, then the main clip releases by pulling the top towards the front of the car. The door seal comes off with the trim, just put them aside. The the lighter upper trim, this is easy to break to top clips so take it carefully. There is a hidden clip towards the bottom and another in the middle to release first by pulling inwards. Once they are out, there are 3 clips along the rear windscreen side of the panel that are hard to get under. This is what the rear of the panel looks like to assist:
×
×
  • Create New...