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Free CTS Practice Test

Pass the Commercial Tire Service - 300 Level exam with confidence.

Start with a free CTS practice test and build exam-ready confidence for the Commercial Tire Service - 300 Level exam.

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1000+CTS Questions
19Exam Domains
10Free Questions
2026Updated
What you get

Everything your CTS certification prep needs

Practice expert-vetted questions, find your weak domains, and turn every mistake into a focused review plan.

Expert-vetted questions

Every question is reviewed by an experienced CTS professional for clarity, accuracy and practical exam relevance.

See what to study next

Domain analytics show which parts of the exam blueprint are holding you back.

Turn mistakes into confidence

Missed questions become a review list, so nervous guessing turns into focused repetition.

1,000+ exam-realistic questions
All 19 CTS domains
Weighted to the exam blueprint
Clear answer explanations
Updated for the 2026 exam
Instant, one-time access
Know where you stand

Your exam readiness

Track your readiness, domain strengths, and recent results at a glance.

Your exam readiness

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Domain performance
Recent quiz performance

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Your progress at a glance

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This is a preview of your analytics Track your real exam readiness, weak domains, and quiz history with Fast Track and Pass Confidence.
Study by domain

Practice the CTS exam by domain

1. Introduction

Key exam domain

Identify weak areas and improve with focused review.

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2. Tires

Key exam domain

Identify weak areas and improve with focused review.

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3. Rims, Wheels & Hubs

Key exam domain

Identify weak areas and improve with focused review.

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4. OSHA Regulations

Key exam domain

Identify weak areas and improve with focused review.

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5. Road Service Safety

Key exam domain

Identify weak areas and improve with focused review.

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6. Jacking & Lifting, Lock-Out/Tag-Out

Key exam domain

Identify weak areas and improve with focused review.

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7. Tire/Wheel Inspection

Key exam domain

Identify weak areas and improve with focused review.

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8. RIST

Key exam domain

Identify weak areas and improve with focused review.

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9. Hub-Pilot Service

Key exam domain

Identify weak areas and improve with focused review.

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10. Stud-Pilot Service

Key exam domain

Identify weak areas and improve with focused review.

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11. Demountable Rim Service

Key exam domain

Identify weak areas and improve with focused review.

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12. Single Piece Demount & Mount

Key exam domain

Identify weak areas and improve with focused review.

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13. Single Piece Inflation

Key exam domain

Identify weak areas and improve with focused review.

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14. Multi-Piece Demount & Mount

Key exam domain

Identify weak areas and improve with focused review.

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15. Multi-Piece Inflation

Key exam domain

Identify weak areas and improve with focused review.

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16. Balance & Run-Out

Key exam domain

Identify weak areas and improve with focused review.

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17. Repair

Key exam domain

Identify weak areas and improve with focused review.

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18. Charts & Tables

Key exam domain

Identify weak areas and improve with focused review.

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19. USTMA Guidelines

Key exam domain

Identify weak areas and improve with focused review.

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Built for practice, not passive reading Active recall and repetition build real exam-day readiness.
Written to match the real exam Every question mirrors the style, difficulty, and phrasing of the actual CTS exam.
Aligned to the CTS blueprint Weighted across every exam domain, so you practice exactly what's tested.
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Before you decide

Frequently asked questions

Straight answers about the CTS exam, the questions, pricing, the free trial, and how this fits your prep.

The CTS exam spans 19 domains - Introduction, Tires, Rims, Wheels & Hubs, OSHA Regulations, Road Service Safety, Jacking & Lifting, Lock-Out/Tag-Out, Tire/Wheel Inspection, RIST, Hub-Pilot Service, Stud-Pilot Service, Demountable Rim Service, Single Piece Demount & Mount, Single Piece Inflation, Multi-Piece Demount & Mount, Multi-Piece Inflation, Balance & Run-Out, Repair, Charts & Tables, and USTMA Guidelines. Every practice question maps to one of them, so you train on exactly what's tested.

No - and that matters. These are original practice questions written to mirror the style, difficulty, and domain coverage of the CTS exam blueprint. We never distribute actual exam content, so practicing here keeps you fully compliant with official exam policies.

No. CTS Exam Prep is an independent study resource for Commercial Tire Service - 300 Level (CTS). It is not affiliated with, sponsored by, or endorsed by the official certifying body or exam administrator.

What candidates say

Trusted by CTS candidates

Real feedback from CTS candidates on Reddit.

★★★★★
Sourced from Reddit

"put off studying for weeks then crammed the last few days. the practice questions on ctsexam.com saved me, especially the RIST stuff since i always mix up the steps. passed first try, still kinda surprised."

r/mechanic Posted on Reddit
★★★★★
Sourced from Reddit

"honestly wasnt sure i needed to study at all after years on the job but the multi piece inflation section humbled me real quick. went thru the mock exam twice and it pointed out exactly where i was weak. no regrets."

r/Tires Posted on Reddit
★★★★★
Sourced from Reddit

"took this twice before, failed both times from rushing. this time i actually reviewed my missed questions instead of just retaking the same test over and over. the osha section finally clicked. passed, moving on with my life."

r/Truckers Posted on Reddit

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