The free wheel fitment checker for car enthusiasts. Test offset, backspacing, poke, tire stretch, and fender clearance in real-time 3D — and see exactly how a new wheel and tire combo will look on your car before you buy.
Will these wheels rub? Will this offset poke? What size tire fits my rim? What's the right backspacing for my car? Find out in seconds.
Professional-grade tools in a zero-install web experience.
Procedurally generated wheel and tire meshes update instantly as you drag sliders. No pre-baked models.
Poke, backspacing, speedo error, revs per mile, and tire-to-rim compatibility — all calculated live.
Wireframe fender overlay with adjustable arch height, distance, and lip depth to check clearance.
Multiple spoke designs, 8 rim colors, and 4 finish types — polished, matte, brushed, gloss black.
Summer, all-season, and winter tread patterns with realistic sidewall text and tread geometry.
Toggle a wireframe comparison overlay to see your new setup against a stock baseline side by side.
Dial in wheel diameter (14"–24"), width, offset, tire section width, and aspect ratio.
The procedural mesh rebuilds instantly. Rotate, zoom, and inspect from every angle.
Review poke, backspacing, speedo error, and clearance before you spend a dollar.
From daily drivers to show cars — see how different specs affect fitment.
18×8.5 ET+35 — 225/40R18
19×9.5 ET+22 — 255/35R19
18×10 ET+15 — 215/35R18
18×11 ET+8 — 295/30R18
20×10.5 ET+5 — 245/35R20
18×12 ET-10 — 335/30R18
Stop guessing. Open FitmentLab and see exactly how your setup will look — free, instant, no sign-up.