Equipment tires — Rhode Island Permit Test
Equipment tires on the Rhode Island permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
In Rhode Island you may not drive on a tire with less than 2/32 of an inch of tread.
A bald tire cannot push water away, so the car slides on a wet road.
You may not drive on a tire that has less than 2/32 of an inch of tread (measure the depth of the tread with a quarter).
You can measure tire tread depth with a quarter.
A driver with no way to check tread finds out it is worn when the car skids.
You may not drive on a tire that has less than 2/32 of an inch of tread (measure the depth of the tread with a quarter).
Never mix radial and bias-belted tires on your vehicle.
Tires that grip differently make the car pull or slide in a hard turn.
Never mix and match tires on your vehicle (radial with bias-belted).
For an accurate reading, check tire pressure while the tire is cold.
A tire checked hot reads high and gets left underinflated.
In order to receive an accurate reading, measure your tire pressure while your tire is cold.
On the test
What is the least tread depth a tire may have in Rhode Island?
2/32 of an inch. A bald tire cannot push water away, so the car slides on a wet road. Rhode Island Driver’s Manual, p.68: “You may not drive on a tire that has less than 2/32 of an inch of tread (measure the depth of the tread with a quarter).”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
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All Rhode Island permit topics
Where these come from
Every rule here is checked against Rhode Island Driver’s Manual, published by the Rhode Island Division of Motor Vehicles, and against the state code itself. Last checked 2026-10-04.
- src/assets/drivers-manuals/RI.pdf (Rhode Island Driver’s Manual, April 2024, Rhode Island Division of Motor Vehicles, retrieved 2026-09-14 and re-checked 2026-10-04; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/RI.pages.txt (pdftotext -layout, the fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/RI-exam.html (Community College of Rhode Island, Rhode Island Driver Education & Traffic Safety, read 2026-10-04; states the 70% pass mark of the DMV Knowledge Test it administers; sha256 pinned under examSource)
- https://dmv.ri.gov/licenses-permits-ids/permits-tests/operator-manuals (read 2026-10-04; links the manual)