WheelOffset

18×8.5 Wheels on a 2020 Honda Civic

20 documented builds

Show me evidence about using this wheel size on this exact vehicle year. Documented Modified1 builds are observed use — not universal fit confirmation, not a safe offset range, and not a no-rub guarantee.

Evidence summary

  • Documented builds: 20
  • Observed range in our build database: ET30 to ET48
  • Most frequently documented tire: 235/40R18 (9 builds)
  • Axle context: In our build database: 20 documented as square (same size all around); 20 front-only for this size. Rear-only or front-only counts are not treated as square.

Compared with OEM

OEM baseline used for geometry: 18×8 ET50

Width vs OEM: +0.5 in

Outer edge 21.3 mm farther toward fender (more outward poke)

Inner edge 8.7 mm farther from suspension (more inner clearance)

Geometry uses the most frequently documented offset when available. It does not mean the wheel “fits” or “will clear.”

Documented offsets

  • ET35 — 8 builds
  • ET38 — 4 builds
  • ET40 — 3 builds
  • ET30 — 1 build (evidence only — no dedicated page)
  • ET41 — 1 build (evidence only — no dedicated page)
  • ET48 — 1 build (evidence only — no dedicated page)
  • Unknown — 2 builds

Evidence pages for documented offsets

Counts include only builds where offset is actually recorded. Missing offsets are not treated as ET0. Linked offsets meet the size+offset evidence threshold.

Tire sizes used with 18×8.5

  • 235/40R18 — 9 builds
  • 245/40R18 — 4 builds
  • 215/45R18 — 1 build
  • 225/40R18 — 1 build
  • 245/35R18 — 1 build
  • 255/35R18 — 1 build
  • 255/40R18 — 1 build

Most frequently documented is not a tire recommendation.

Suspension, rubbing, and fender context

Suspension recorded on these builds

  • Not recorded — 18
  • Leveling Kit — 1
  • Lowered on Springs — 1

Reported rubbing

  • 0 report no rubbing
  • 0 report rubbing
  • 20 do not record rubbing

Fender modifications

  • Rolled: 0
  • Pulled: 0
  • No trimming recorded: 0
  • Other trimming label: 0
  • Not recorded: 20

Unknown remains unknown. These counts are descriptive evidence only — not probabilities or clearance guarantees.

Real-world builds

Showing 20 of 20 documented 18×8.5 setups.

18×8.5 ET38

Documented Modified1 build

Tire: 225/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 245/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET38

Documented Modified1 build

Tire: 245/35R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET40

Documented Modified1 build

Tire: 245/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET40

Documented Modified1 build

Tire: 245/40R18

Suspension
Leveling Kit
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET41

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET48

Documented Modified1 build

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET30

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET40

Documented Modified1 build

Tire: 245/40R18

Suspension
Lowered on Springs
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 215/45R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET38

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET38

Documented Modified1 build

Tire: 255/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5 ET35

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5

Documented Modified1 build

Tire: 235/40R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

18×8.5

Documented Modified1 build

Tire: 255/35R18

Suspension
Not recorded
Rubbing
Not reported
Fender
Not recorded

View documented build

Compare your own offset

Use the fitment calculator with this vehicle and 18×8.5 as the proposed wheel to see poke and inner-clearance differences vs OEM.

Open fitment calculator

Other documented sizes for this year

Related specs

Modified1 builds are individual observed setups. Vehicle tolerances differ with suspension, alignment, tire shape, ride height, bodywork, brakes, and load.