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DrSilver
06-05-2004, 07:17 PM
hi guys, will 100mm alloy wheels fit a 91 Bg astina? (Its 100mm between opposite studs.
thanks!

pr1mo
06-05-2004, 08:22 PM
certainly will. 4X100 stud patten is what you need

DrSilver
07-05-2004, 10:47 AM
thanks mate!

Rupewrecht
07-05-2004, 11:43 AM
make sure the offset of the rims is about +37 too otherwise you might have scrubbing issues

geetee
08-05-2004, 02:46 AM
also make sure the centre bore is correct or the wheel won`t fit on the hub!
check out this very handy link:
http://www.tyresave.co.uk/fitment.html#MAZD

DrSilver
23-05-2004, 12:54 PM
hi everyone,
is my centre hole size 54mm? i have a 91 astina 1.8i sohc.
cheers!

DrSilver
23-05-2004, 12:57 PM
will an offset of 45 fit me astina?

pr1mo
23-05-2004, 06:26 PM
yep..wont be perfect but it will fit

DrSilver
23-05-2004, 07:48 PM
what do u mean wont be perfect? will it affect the performance or something?
Is the centre hole size = 54mm?

what does offset mean? how does that affect a car?
thanks

geetee
24-05-2004, 03:41 AM
your centre bore is 54mm.
you can fit wheels with a slightly bigger bore but not smaller.
the offset should be between 38 and 42mm.
any bigger or smaller than this and you risk fouling either the wheelarch or the suspension strut.
the best thing to do would be to test the wheels your after on the car and check thouroghly if they foul anything. check with the car on a jack and on the ground turning the front wheels lock to lock.
what kind of wheels are you looking at?
if the offset is outwith the limits for your car, it will affect the handling and suspension geometry, and also the wear on your tyres and suspension components.
hope this helps!!! :wink:

DrSilver
24-05-2004, 10:08 AM
thanks geetee,

I better not buy these mags then cos they have an offset of 45.
hey, if the centre hole is about 67mm, can i get locating rings for the mags? how much do they cost approx?
cheers!

geetee
25-05-2004, 03:28 AM
don`t know if you can get locating rings or if you would need them. the bolts alone would be plenty strong enough to hold the wheel on! and i`m not saying that a 45mm offset will cause you problems, just that by fitting wheels with the wrong offset you are in effect changing the suspension settings. but many people do fit aftermarket or "other manufacturer" wheels and never have any probs!
if your in any doubt then the best thing to do is follow your instincts and look for another set! :wink:

DrSilver
25-05-2004, 11:23 AM
hey,
check this article out:

Spigot size is a bit trickier....the spigot is the bit in the centre of the hub that you rest the inside centre of the wheel on whilst aligning the studs and screwing back the wheel nuts. On generic after market wheels, the spigot hole inside the wheels is a lot bigger than the spigot on the car. So what you need to do in this case is fit spigot locating rings. These are just rings of aluminium or hard plastic, that fit over the spigot on your car and then have a proper fit with the spigot hole on the wheel. If you don't have the spigot taking all the weight of the car, chances are you'll break one or more studs when you drive the car hard or have to brake hard. Remember the wheel nuts are simply there to hold the wheel on, NOT support the weight of the car. Also, as there is nothing to centre the wheel, you'll notice the wheels go in and out of balance because as you drive around, they'll move around on the hub.

Cosmo Dude
25-05-2004, 02:59 PM
That's a new one on me and I've been doing this 'n' that on road, race and rally cars for close to twenty years. Has the author of that ever seen a wheel being ballanced? it's done off the car. The wheel nuts don't sit flat on the wheel surface they have a curved face that sits into a concave area around the hole the stud fits through.
Thanks I needed a good chuckle :lol:

geetee
26-05-2004, 04:38 AM
I`m with cosmo on that one silver! when you put the bolts in the wheel they are all countersunk so the wheel will centre. if it didn`t then believe me you would notice long before the bolts snapped!!! imagine how much it would cost for all these aftermarket wheel manufacturers to make wheels with the correct centre bore for all car makers!!! :lol:

DrSilver
03-06-2004, 05:03 PM
hi guys, i was gonna buy some 15" rims today, but apparently, i need to get low profile tyres with them(my actual tyres are 185/60/R14, with the 15" rims, i will need to get 185/50/R15). Isnt there a way of adjusting the speedo so i dont need to get the low profile tyres?
cheers.

Cosmo Dude
03-06-2004, 06:08 PM
You'd be better with 195/50/15 to retain the rolling diameter. You could have the speedo adjusted but the cost would be higher than that of the correct tyre.

geetee
04-06-2004, 02:42 AM
the 195/50/15 option is the way to go mate. you`ll get a bigger choice of tyre too.
i don`t think 185/50`s are very popular. why don`t you want low pro`s?

DrSilver
04-06-2004, 11:59 AM
what do u guys think about 195/55/15? are they much different to 195/50/15?
i didnt want to go low profile `cos they cost too much :wink:

geetee
05-06-2004, 02:22 AM
they slightly higher.
the 55 on the tyre refers to the percentage of the width ie. 195mm.
so 55% of 195mm gives you the tyre height = 107mm.
the 50`s would be = 97.5mm.
doesn`t sound much (10mm) but it does make a difference to the looks and speedo. :wink:

joe_mazda
05-06-2004, 03:13 AM
195/55/15 are decent enough. i mean they still look pretty good and they don't cost too much dosh!

15's are much better than the standard ones even though there not as nice as 17's. Just remember the money you save on the tyres!

geetee
05-06-2004, 06:58 AM
Just remember the money you save on the tyres!
don`t i bloody know it!!! :cry: :roll:

platypus
05-06-2004, 07:05 AM
just go for 205/55/R15

looks good on my car and thats all that counts, cost me $160ea to retyre

TURBO MAZDA
09-06-2004, 04:35 PM
I Have 205/40/r17 on my bg

Cost me $150 a tire and the speedo is only slightly out

When my speedo says 100 i'am actualy doing 106 which i didn't need to get fixed , when the car was engineered.

BigMal
09-06-2004, 10:28 PM
I thought 205/40/17 put you under not over or maybe thats just a BA.
Sure the tyre chart said a 215/40/17 had less cirumference than stock
when I added my 17's.
Have to be carefull then as that "speed limit +10 they wont book me
theory" goes out the window if you are actually doing like 117 in a 100 :(

geetee
10-06-2004, 05:30 AM
yip i`ve got 205/40/17`s too. tyres are pretty much the same height as standard when they together. maybe a slight difference. in fact i`ve still got a 185/60/14 spare!
just had a thought.......does this mean i`m more likely to need a 2nd - 3rd gear change before i hit 60mph??? i seem to be struggling to get there in 2nd gear!!! redlines at about 55mph :? or am i maybe actually reaching 60 but the speedo is reading slightly less?

Rupewrecht
10-06-2004, 01:02 PM
I thought 205/40/17 put you under not over or maybe thats just a BA.
Sure the tyre chart said a 215/40/17 had less cirumference than stock
when I added my 17's.
Have to be carefull then as that "speed limit +10 they wont book me
theory" goes out the window if you are actually doing like 117 in a 100 :(

with 205/40/17s my speedo is spot on - when the speedo shows 100 i'm actually doing 100-102kph

pr1mo
10-06-2004, 01:10 PM
im 3km out on 205/40/17

BigMal
10-06-2004, 01:59 PM
Oh well Jimbo's problem now he has the 17's. Will see if he
can get booked this weekend with double points.

andrewgrazier
23-06-2004, 10:31 AM
ive got the standard 14 inch rims
does anyone have problems with 15s or 16s or 17s hitting the inside of the wheel arch?
also
for the people with the rims
did you get new springs for it before or after?
ive noticed that the rear of my car sits a lot higher than the front
which sometimes is the result of crap or worn out suspension

Laser the Amazer
23-06-2004, 10:32 PM
195/55/15 are decent enough. i mean they still look pretty good and they don't cost too much dosh!

15's are much better than the standard ones even though there not as nice as 17's. Just remember the money you save on the tyres!

I got 15" 3 spokes on my BG. look alright. car sits high tho 4 wheel drive style lol

alot better price then 18's like with the Lynx

Rob

joe_mazda
24-06-2004, 03:20 AM
andrewglazier: You'll only get a few problems with the 17's but nothing major. Anything lower size is fine and will go straight on. I did my springs after the wheels coz i thought it would 'sweeten' her up. BG's are known for rear springs which fail after a while (several years). Mine were broke when i did my springs, glad i changed.

Laser: I totally agree, why spend mega $$ on a few extra inches and even more on those tyres. BG was not designed for big wheels (like a skyline can have HUGE wheels etc..). Sounds like you need to go lower or take to the rally track! :D

geetee
24-06-2004, 04:29 AM
the best thing for looks is a lowering kit. even with 14" rims a lowered car will look ok. but stick a set of 17"s on without the lowered suspension and it just looks naff!
when i got my wheels i was never happy with them until i got the car lowered. i feel the 2 mods go together and gives the car the complete look. i always felt as if i had borrowed the wheels coz they didn`t look like they should have been on my car.
as joe said the rear springs fail on bg`s. dunno why, but mine had the top coil hanging down the middle of the spring. :wink:

geetee
24-06-2004, 04:36 AM
andrew: the only problem i had with 17"s was the pass. side inner wheel arch was getting a scuffing from the tyre on full lock turning right. i solved this by putting a screw through the plastic and into the metal behind. screw goes through just under your airbox. it pulls the plastic bit away from the tyre. nae bother now mate! :wink:

DrSilver
24-06-2004, 01:22 PM
how do you check whether the rear springs have failed or not?
I ve noticed that all Bg astinas are a bit higher at the back.

joe_mazda
24-06-2004, 09:25 PM
Best way to test them is if you're getting a bumpy ride in the back of the car, or visually look at them at the top of the spring coz this is where the'll be perished.

Yeah, i dunno why there a little bit higher? just the way they were made i guess, but once its lowered you don't notice it. :D

SehnKhan
24-06-2004, 10:37 PM
The BG sedan sits a little higher at the back too I noticed.

andrewgrazier
25-06-2004, 02:48 PM
yeah ive heard and seen that too
then again
its possible to snap the bolts when your taking the wheel nut off

the forces on it doin a few 100 :) would be pretty bad if it was just locaed on the bolts :S