Daewoo Chevrolet Forums and Owners Club

Hey I have a set of 15" lacetti wheels that im fitting to my matiz. i was just wondering what size tyres i would be looking at? any help would me much apreciated.

also thair are metal flanges on the rear drums and front hubs (see attatched picture) that are preventing me from seating the wheels far enogh back would i be ok to remove these? the other option i have it to get holt of some longer studs around 10-15mm longer and fit some spacers to adapt around them but im haveing trouble finding any aftermarket studs

Why would you fit 15'' wheels on a matiz?

Supposing they fit, you are risking your rims to bent or break if you drive trough a pot hole, also you front train is going to work harder reducing it's life! since the tires are barely absorbing any effort because they have to be low profile tires...

I don't think you can remove these. If the original wheels are a snug fit around the flange, then it is part of the wheel locating mechanism and ought to remain in place.

If you fit spacers you may find the tyres will contact the wheelarches which won't do either. Maybe you need to find some matiz alloys instead.

Major issues here - don't think this is suitable without adjustments to brakes and suspension. May strain the drive axle and damage the gearbox sooner than it should.

also I think this will increase the ground clearance and make the var unstable in high gears and around corners.

forget about it, if you ask me, or get some after market good looking 13" alloys.

y not fit them

i already have matiz alloys that are sprayed gloss black just looking for a change

id be looking at 195/40 /R15 tyres the wheels + tyres will fit in the arches without rubbing even on full lock (already checked the clerance) with the low profile tyres the overall wheel diamiter over my 13" will only be increased slightly i have been told by my mates dad who works for GM and deals with chevys and vauxhall that the rings on the hubs are in no way structual and just help in aligning the wheel to the hub

Let me know if this works please

its your call pal, I just don't think its a good idea and you will never know how the car will behave under load, beside - I think - this will give you a wrong speedometer readings.

let me know, may be I will try it someday !

OK Heres some maths for you to play with

My current tyres are 155/65 R13 from this I caculate that the tyres are 10cm tall and that my wheels are 33cm tall. Adding these together gets me 43cm, this is the total diamiter of my current wheels. Using this I can caclulate that the cerumfrance of the 13" wheels is 1351cm.

the wheels i will be fitting are going to be fitted with 195/45 R15 tyres from this i can cacluate that the tyres are 8cm tall and that the wheel is 38cm tall. adding these two together gets me 46cm, this is the diamiter of these wheels the cercumfrance is 1472cm

so the new tyres will give an increce of 121cm in the cercumfrance and and overall increace in hight of 3cm

The respective diameters of your 13 and 15 inch wheels in millimetres is 330.2mm and 381mm

The height of your 155/65 and 195/45 tyres is 100.75mm and 87.75mm

This tyre height has to be added twice to each wheel diameter to obtain your overall wheel and tyre diameter.

Therefore 330.2 + 201.5 = 531.7mm giving a circumference of 1670.6mm for the 13 inch wheel and tyre

and 381 + 175.5 = 556.5mm giving a circumference of 1748.5mm for the 15 inch wheel and tyre

that means the circumference of the 15 inch wheel is 77.9mm (3 inches) longer than the 13 inch wheel

For each revolution of your road wheel and tyre, the car will travel 3 inches further than the 13 inch wheel/tyre combination so the overall effect of this on your speedometer reading means that it will read high.

Also your car will have less acceleration but should achieve a higher top speed due to the higher gearing achieved by the larger diameter.

All of the above ignores the tyre pressures which of course will change the overall diameter of any wheel/tyre combination.

did you guys sit there n try to work it out?????
think my figures came out different using
http://www.etyres.co.uk/tyre-size-calculator.htm

Nice find Bodie and i did try to work it out i guess my math at midnight is a bit off and i also forgot to add the tyre hight twice o well thatks for the info Jon.

iv desided that the way to go is to get the center of the wheels bored out so that they fit this saves me haveing to space anything out or mess about with the car's hubs. Anyone know anyware in the birmingham area that would do this for me? so i dont end up with a wobble

why not check your owner's manual?

they usually mention the safest upgrades possible for bigger rims and tiers!

(28-08-2010 07:24 AM)Bodie Wrote: [ -> ]did you guys sit there n try to work it out?????
think my figures came out different using
http://www.etyres.co.uk/tyre-size-calculator.htm

Bodie, I didn't try to work it out, I did work it out!

I came up with 531.7mm and 556.5mm for the respective diameters and the tyre size calculator on your link came up with 532mm and 556mm.

More importantly the tyre size site recommends a maximum of + - 2.5% diameter change and bikerdude's proposed wheel change would give an increase of 4.51% so IT IS NOT RECOMMENDED!

Continue with this change at your peril and be warned that should you have an accident and your car is inspected there's every possibility that your insurance company will decline to pay out.

(29-08-2010 05:30 AM)Jon Stead Wrote: [ -> ]Bodie, I didn't try to work it out, I did work it out!

you have to much time on your hands