What's the risk? Going from 15" rim to 16" rim
- Thread starter ceebs40
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whiskywizard
New member
If the new rims have the same offset as you have now, you won't hurt wheel bearings or brakes. However, that's a big change in rolling diameter and hence a big change in wheel speed. You'll be affecting overall gear ratios and speedometer calibration. Is there a reason you wouldn't go to a "plus 1 configuration" where you go up an inch in wheel diameter but drop down in aspect ratio so rolling diameter remains the same?
TFJ-4runner
New member
More mass to turn
Tires will cost more
Increased stopping distance
Less MPG...ETC
It's only an inch so I wouldn't even worry especially if you are staying around or close to stock parameters.
Tires will cost more
Increased stopping distance
Less MPG...ETC
It's only an inch so I wouldn't even worry especially if you are staying around or close to stock parameters.
I would go to a +1 just have found a pair on craigslist that I like so was curious what the downfalls would be..
I have the 15" Enkei that came as an upgrade on the 99' and hate them.
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IanB
New member
240/70/15 isn't a tire size, you must have meant 235 or 245, and neither of those is the stock tire size for a 3rd gen 4runner anyways.
You will feel the extra weight of the tires with acceleration and braking, and in your mpg (although this will be offset a bit by taller gearing on the highway).
So it sounds like in the big picture the 1" really isn't going to affect me too much..
Actually running the conversion from here English to Metric Tire Conversion for Your Car, a 30x9.5x15 = 241/79/15.. so I said 240.
Is the tire really a 30x9.5 then? That's what it says on the tire... Michelin LT4 and I can't find a replacment in that size...
I've seen it shows stock with the 15's as 225...? I'm all confused..
IanB
New member
Metric tire sizes go up in increments of 10mm, always ending in 5's, so 205, 215, 225...standard sizing may not translate exactly to metric. I've never purchased tires based on standard sizing, but it looks like the size tire currently on your truck isn't the proper sizing anyways.
Stock 15" sizing is a 225/?/15, and stock 16" sizing is 265/70/16, although many run 265/75/16 when they replace the tires, which requires no lift for the most part.
Stock 15" sizing is a 225/?/15, and stock 16" sizing is 265/70/16, although many run 265/75/16 when they replace the tires, which requires no lift for the most part.
Can you elaborate on the "for the most part"
From everything i've seen, 265/75/16 will fit on a 99' SR5 2WD with no rub.. (no tow load, etc.)
IanB
New member
When I put my 265/75/16 Duratracs on, they rubbed a bit in the front if you hit a bump when turning, or that kind of thing. Very minor, but annoying. Swapping to '99 tall springs fixed that.
99runnerwa
New member
Mine came with the same wheels, I believe they were 225/75 r-15. which came out to about 29.5 inch diameter. Not sure what will fit, but going up to a 30 or a 31 wont cause much of an issue. I went up to 33 inch and the speedometer is off by about 18% and I could tell there was some performance loss but not to the point of making it un-drivable. I was in the same place you were, but now looking back i kind of wish i had kept the stock Enkei wheels and just painted them black.
Very minor. Ok good. Thanks.
Good point. Doing so much highway travel, i'm hesitant to go too much bigger.
32x9.5 sounds like the happy medium. Just need to decide if I want to go to 16's since I can get a set of Toyota rims with newish tires for $500 from craigslist. New tires for the 15" Enkei's is gonna be around the same :redbrick:
brian2sun
Elite Member
FYI...
Most tires that are made for 15" wheels are generally sized in inches (i.e. 31x10.5R15), but not always. Tires made for 16" wheels are generally sized with the metric system.
There were 2 different sizes that came stock on 3rd gens and they are both metric..
225/75R15 (which is about a 29" tire) and
265/70R16 (which is about a 30.5" tire).
Your current 30x9.5R15s aren't stock size tires, but are very close in diameter to 265/70R16s. Going up to 265/75R16s aren't going to make a big difference in power or mpgs.
Most tires that are made for 15" wheels are generally sized in inches (i.e. 31x10.5R15), but not always. Tires made for 16" wheels are generally sized with the metric system.
There were 2 different sizes that came stock on 3rd gens and they are both metric..
225/75R15 (which is about a 29" tire) and
265/70R16 (which is about a 30.5" tire).
Your current 30x9.5R15s aren't stock size tires, but are very close in diameter to 265/70R16s. Going up to 265/75R16s aren't going to make a big difference in power or mpgs.
Thanks for the info. This is good news. Looks like i'll be looking at 265/75/16's. Now I just need find a set on craigslist... :hungry:
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