Changing from 15 inch to 17 inch wheels...

[gaijin]

I'm planning on changing my stock 15 inch wheels for the 17 inch type alloy rims. What are the advantages/disadvantages of doing such?

[ILuvDetailing]

advantages: The "porma" factor, better handling.

disadvantages: Ride quality suffers if you don't change springs / shocks, 17" tires ain't cheap.

[Doc Diesel]

aside from being off the speedometer...

http://www.miata.net/garage/tirecalc.html

[Karding]

Kaya pala ang stock 17" ng MZ3 205/50/17 at sabi ko bakit hindi ginawang 205/40 or 45. Its to minimize the off reading of the speedometer. But it looks like I can upgrade the tire to 215/45 and 1% lang differential. Kung kakasya, 225/45 and a 0.4% too slow lang ako.

Doc Diesel, thanks for the link.

[111prez]

aside from being off the speedometer...

http://www.miata.net/garage/tirecalc.html

galing ng link! very informative

in my case, changing to the new tires (same rime though) makes me travel 7.3% slower or the speedometer reads 60kph while actual speed is 64kph

tanong ko lang:

1. does this mean that i am consuming more fuel?
2. puede kaya i-adjust and speedometer to match the new tires?

[ghosthunter]

bigger mags also mean more weight... so acceleration will be slower and more fuel will be used to accelerate the car.

[ssaloon]

unless you get lightweight 17s

[espeago]

Ride Quality - A low-profile tire such as a 50 or a 40-series looks great, but can be harsh over bumps or potholes when compared to a 55 or 60. In general, a lower profile tire also exposes the wheel to damage more easily. Lower profile tires also have stiffer sidewalls, which improves handling but increases rides harshness.... It's all about compromise and there's no such thing as free meryienda.

[odell]

konting ingat lang pag naka 17's na and i suggest you get a rota for the durability in our roads. hehehehe

[niky]

You can't have your cake and eat it, too.

17-inchers are definitely going to make the ride stiffer. Heavier 'pa-porma' mags will significantly increase fuel consumption and decrease performance, often to the tune of 5-10 hp at the wheels. Lighter 'performance' mags like ROTAs will minimize this consumption increase while freeing up maybe 1-2 hp at the wheels, if your stock 15s are heavy. A 17" ROTA with tire often weighs around 35-38 lbs, while stock 15s can weigh between 35-40++ lbs with tires, depending on design. Therefore, any decrease in top speed and fuel efficiency will come down to the width and height of the tire itself.

Problem with 17" ROTAs (especially with thin tires) is the increased 'bengkong' factor. Over a few years, if you go over enough potholes, they will DEFINITELY deform. Just because they're cheap and sturdy doesn't mean you don't have to be careful with them.

[ssaloon]

that's why i opted to get 225/45/17 tires on my 17s instead of the regular 215/45 (slightly thicker sidewalls for 225, sasayad naman sa fender kung 215/50 ). wider tires are more welcomed for me.

also, some people upgrade to larger diameter wheels to accomodate bigger brakes

[Karding]

I agree. When choosing a larger wheels, put the weight into consideration.

A good rule of thumb, IMHO, is what I call pound-per-inch

i.e.
a 17 inch wheels should only weight 17lbs when measured by itself

Pero 17" and 23lbs lang ang kaya kong bilhin, hahaha.

[ILuvDetailing]

sa mga lightweight rims, ano ba material gamit?

[Doc Diesel]

don't forget the load ratings too....

[Karding]

sa mga lightweight rims, ano ba material gamit?

I think the question we should ask is what processed was used. Materials are still alloy, however the manufacturing techniques such as the so called FORGED is the strongest. Another process called is pressure cast. Widely available and affordable wheels are manufactured simply by "casting."

Wheel Manufacturing Techniques

[ILuvDetailing]

Karding: Thanks for the info

[Doc Diesel]

a more detailed tire calculator....

http://www.1010tires.com/TireSizeCal...?action=submit