S-Chassis Wheel Fitment Chart: 18x9.5, 18x10 and 180SX Offset Lookup Tables for S13, S14 and S15

Short version: on a sorted S-chassis at drift ride height with a couple of degrees of front camber, 18x9.5 in the high +20s to +30 sits flush to tucked on all three chassis, front and rear. Drop into the high teens and you are into roll-the-guard territory. Anything at 18x10 or wider below +15 wants a roll, a pull and real camber, and the 180SX's rear quarters are the one spot in the whole family that runs out of room first. That is the summary. Below are the actual lookup tables, because "roughly flush" is not much use when you are staring at a listing for a specific size at a specific offset and deciding whether to send a deposit.

This chart is the layer beneath the S-chassis wheel fitment guide: read that one first for what PCD, offset and width actually mean and the general 17-inch bolt-on ranges. This page assumes you already know the four numbers and pushes further into 18-inch territory and the specific sizes people actually search for: 18x9.5 +15, 18x10 +12, and what a 180SX can carry out back.

How to read the tables

Every row is a width, an offset band and a verdict, split by chassis and axle where they genuinely differ. The verdicts mean:

• Tucks: sits under the guard lip at a sensible ride height, no drama.
• Flush: roughly level with the guard lip. Fine on smooth roads; hard compression or a pothole can still tag it.
• Needs roll: the guard lip needs rolling flat, no cutting, to clear reliably.
• Needs pull: rolling alone is not enough; the lip needs pulling outward as well.
• Needs flares: beyond what roll-and-pull fixes without cutting. Bolt-on or riveted flares are the honest answer, not a last resort.

Offsets are given as bands, not single numbers, because two cars at the identical size and offset genuinely give different verdicts depending on the rest of the setup. That is not this chart being vague, it is being honest: every source it is built from (fitment galleries, forum build threads, and the drift-specific presets built into this site's own wheel offset calculator) shows real spread at the edges of each band. Use the bands to narrow your shopping, then confirm the specific wheel against your specific car before you buy.

The lookup tables

Front

Chassis	Size	Offset	Verdict
S13 / 180SX	17x9	+18 to +25	Tucks
S13 / 180SX	18x9.5	+25 to +30	Flush
S13 / 180SX	18x9.5	+15 to +20	Needs roll
S13 / 180SX	18x9.5	Below +15	Needs pull; inner clearance bites as often as outer poke
S14	18x9	+20 to +25	Flush
S14	18x9.5	+18 to +25	Needs roll
S14	18x9.5	Below +15	Needs pull; check clearance lock to lock
S15	18x9	+20 to +25	Flush
S15	18x9.5	+18 to +22	Needs roll (the common S15 front combo lands right here)
S15	18x9.5	Below +15	Needs pull; check clearance lock to lock

Front width usually runs half an inch to a full inch narrower than the rear at the same offset once you go staggered, because the front carries less power and the priority is steering clearance, not traction.

Rear

Chassis	Size	Offset	Verdict
S13	17x9.5	+15 to +20	Tucks with a roll
180SX	17x9.5	+15 to +20	Needs roll; quarters are tighter than the S13 coupe/sedan
S13 / 180SX	18x9.5	+25 to +30	Flush
S13 / 180SX	18x10 to 18x10.5	+15 to +20	Needs roll and camber
180SX	18x10.5 to 18x11	Below +15	Needs pull; flares are a live option here
S14	18x9.5	+22 to +25	Flush; the safe reference point on a stock body
S14	18x10 to 18x10.5	+12 to +18	Needs roll, pull and camber
S15	18x9.5	+30 to +38	Tucks
S15	18x9.5	+20 to +25	Flush to slight poke
S15	18x10	+12 to +15	Needs roll at minimum; see the note below

Where this gets genuinely contested

Two spots in these tables are not the site smoothing over a clean answer. They are real disagreement in the community, and you should know that before you buy.

18x10-ish rear at low offset. Whether this needs a roll or a full roll-and-pull depends heavily on ride height, camber and whether you are running a stretched tyre. Builds on a rolled-only guard with a 245 report clean clearance; others at what looks like the same size and offset report needing the full pull plus flares. The honest read: budget for a pull, be pleasantly surprised if a roll is all it takes, do not assume the reverse.

S15 versus S14 at similar numbers. One well-documented S15 build runs 9J at +12 front and 10J at +12 rear on standard arches with nothing more than a rear roll. S14 owners chasing the same width and offset commonly report needing a pull and real camber to get there cleanly. The two chassis share a great deal, but guard profile is not identical, and a number that is easy on one is a project on the other. Treat any specific combo you read about as a strong lead, not a guarantee, until you have test-fitted it on your own car.

What changes the answer

The table assumes nothing about your specific car, so four things move every verdict in it:

• Ride height. Lower changes the arc the tyre sweeps through in suspension travel, and it is the single biggest swing factor between "tucks" and "needs roll" at the same wheel spec.
• Camber. A couple of degrees of negative front camber tilts the top of the tyre inward, away from the guard lip, which is the cheapest clearance you will ever buy. Almost every verdict above assumes a sensible amount of it rather than zero.
• Tyre stretch. A tyre narrower than the wheel reduces the sidewall bulge that hits first. Stretch buys clearance; it also gives up sidewall support, which matters more on the front than the rear.
• Angle kit. Everything above is a static check: car stationary, wheels straight or at a normal alignment angle. Steering to full lock swings the front wheel through an arc a static check never reveals, and modified knuckles or a full kit change how far that arc goes. If angle hardware is in the picture, treat this chart as step one and read the angle kit wheel clearance guide for what actually hits at full lock and how much clearance a kit costs you.

For the exact poke and backspacing numbers a size change gives you against your current wheel, run it through the wheel offset calculator: plug in what you have and what you are considering, and it draws the cross-section to scale instead of making you do the millimetre arithmetic by hand.

Buying against this chart

Once you know the band you are shopping in, browse wheels and tyres for sale filtered to your PCD, diameter and width, and check the offset against the tables above before you message a seller. A few secondhand-specific habits worth keeping:

• Ask the seller to measure the offset rather than trust the listing title. "18x9.5 et15" typed from memory is wrong often enough to matter.
• If a set is JDM-branded and priced like it, the authenticity checks in how to spot fake JDM wheels are worth five minutes before a deposit goes anywhere.
• Test-fit before mounting fresh tyres. A verdict of "needs roll" assumes a competent roll job on a guard in decent condition; rust or prior damage changes the outcome.

The numbers, then the wheels

These tables get you into the right size and offset band fast, but they are a starting point, not a substitute for a tape measure and a test fit on your own car at your own ride height. Once you have narrowed it down, the current wheels and tyres listings are where the actual stock is, and if you have a set sitting in the shed that turned out to be the wrong offset for your build, list them free: someone shopping against this exact chart is searching for precisely those numbers.