The Standard for Used Tires

Every tire
tells the truth.

Surety brings machine-verified certification to the used tire market. SR-graded tires, inspected by proven industrial technology, listed and sold on evidence — not opinion.

List Your Inventory Find Certified Tires
32s
Per tire inspection
$9B+
US used tire market
SR-A
Top certification grade
S
Surety
The Problem

A $9 billion market
running on guesswork.

$9B+
US Used Tire Market Annually
Growing at ~4% per year. Every tire changes hands with no independent verification of its internal condition.
0
National Certification Standards
No CarFax equivalent for used tires. No independent body. No objective grade. The market has operated this way for over a century.
35%
Of Buyers Avoid Used Tires Entirely
Safety concerns are the primary reason. That demand exists — it needs a trust mechanism to unlock it.

"Tread depth tells you almost nothing about what's happening inside a tire."

The failures that cause accidents — belt separation, UV degradation, hidden impact damage — are invisible to visual inspection. Buyers have no way to know. Sellers have no way to prove their good inventory is genuinely good.

  • Internal belt separation — undetectable without ultrasonic testing
  • UV degradation — rubber breaks down invisibly from the outside
  • Prior impact damage — a kerb strike with no visible evidence
  • Poor repair quality — prior punctures may fail under load
  • Age — tires over six years carry risk regardless of appearance
How It Works

We scan. We list.
We earn when they sell.

Surety arrives at your location, inspects your tire inventory at no charge, and lists certified tires on the marketplace. You pay nothing until a tire sells.

01
We Arrive
Surety brings the inspection van to you. No upfront cost. No commitment. No disruption to your operation.
Consignment
02
We Scan
Every tire through our 5-station indexed conveyor. Laser tread mapping, AI visual inspection, DOT age verification. 32 seconds per tire.
Certified
03
We Grade
SR-A, SR-B, SR-C, or Fail — from our cloud algorithm. Immutable, timestamped record in the Surety database.
Graded
04
We List
Certified tires appear on the Surety marketplace with full inspection data. You set the price with our comparable sales guidance.
Marketplace
05
We Earn Together
When a tire sells, Surety takes a fee. You receive the balance. No charge if it doesn't sell. Your downside is zero.
Revenue Share
◈
Surety is a revenue generator for its partners — not a cost. We convert dormant inventory into certified, listed, sellable product.
For Partners

Your inventory.
Finally working for you.

$
Zero upfront cost
Surety scans your inventory at no charge. You pay nothing until a tire sells. The financial risk is entirely ours.
◎
Dormant inventory monetised
Most salvage yards have 400–800 tires sitting unsold. Surety converts that pile into certified, listed inventory on our marketplace from day one.
✦
SR-A tires command 35–60% premium
Certified tires sell faster and at higher prices than uncertified equivalents. The Surety grade does the selling for you.
⬡
No operational disruption
Surety arrives, scans, and leaves. Your operation continues unchanged. We work around you.
The Core Proposition
Your downside is zero. Your upside is real.
Surety takes a fee only when a tire sells — $7 flat plus 12% of sale price above $40. Everything else goes to you. If a tire doesn't sell, neither of us makes anything. Our incentives are perfectly aligned.
Salvage yards
Fleet operators
Auction houses
Dealer groups
Tire wholesalers
Fleet depots
Become a Partner
For Buyers

Know exactly
what you're buying.

Every tire on the Surety marketplace has been machine-inspected, graded to a defined standard, and certified with a tamper-proof QR record tied to its unique DOT serial number.

SR-A
Premium Grade
Tread≥7/32"
Max age< 4 years
DefectsNone detected
Full highway use
SR-B
Standard Grade
Tread4–6/32"
Max age< 6 years
Repairs1 approved
Normal use — condition disclosed
SR-C
Secondary Grade
Tread3–4/32"
Max age< 8 years
FindingsMinor, noted
Secondary or spare use only
FAIL
Not Certified
Tread<3/32"
AgeAny
DefectsDetected
Cannot be certified — not listed
⬡
Tamper-proof certification
Every cert is cryptographically tied to the tire's unique DOT serial. Scan the QR to validate against our live database instantly.
◎
Machine-generated record
No human subjectivity. The grade comes from sensor data — laser measurements, AI visual analysis, DOT age calculation. Immutable and timestamped.
◈
Insurance-backed warranty
SR-certified tires are eligible for a 12-month road hazard warranty. We stand behind every grade we issue.
Technology

Proven industrial components.
No novel physics required.

The Surety inspection machine is built from commercially available components deployed in automotive service, food production, and semiconductor inspection today. The innovation is the integration, the certification standard, and the marketplace built around it.

01
DOT Capture
Industrial camera + Anyline OCR SDK reads the DOT serial and manufacture date automatically. Tire identity anchored in the database before any sensor fires.
3 seconds
02
Laser Tread Mapping
Two Keyence laser line profilers map the full contact patch at ±0.1mm across four spatial points. More accurate than any manual depth gauge, every time.
5 seconds
03
AI Visual Inspection
Four industrial cameras with diffuse LED lighting capture all surfaces simultaneously. NVIDIA Jetson inference flags cracking, bulges, cord exposure, uneven wear, and prior repairs.
8 seconds
04
Grade & Certification
Cloud algorithm issues the grade. Immutable record written to database. Void-film QR label printed and applied. Complete.
5 seconds
Why This Matters
The current market standard for used tire inspection is a human glancing at the tread. The bar we clear is 'consistently, measurably, and documentably better than anything currently available.' Our sensor stack clears that bar by a significant margin.
Machine Performance
Cycle time per tire~32 seconds
Throughput (steady state)60–80 tires/hr
Tires per operating day360–480
Tread accuracy±0.1mm
Grade repeatability target≥98%
Machine cost per van$37–55k
SR-A+ Coming Year 2
A static-contact ultrasonic belt check will be added as Station 3b. SR-A+ will be a premium grade tier with internal belt inspection data and a higher price point for sellers.
The Standard

Building the benchmark
the industry will have to meet.

Surety is pursuing SAE International standard status for the SR grading system. SAE is the same body that defines motor oil viscosity grades, brake fluid ratings, and vehicle emissions protocols.

M8
Month 8 — Petition
SAE Petition Filed
Submitted with real pilot data — grade distribution, sell-through rates, and inspection records. Evidence, not a concept.
Y2
Year 2 — Committee
Technical Committee Formed
SAE assembles tire manufacturers, fleet operators, and insurers. Surety leads the technical documentation — writing SR-A / SR-B / SR-C criteria.
Y3
Year 3 — Drafting
Draft Standard Circulated
Grade criteria, inspection protocols, equipment requirements, and certification language all go to committee ballot. Surety's criteria become the industry reference.
Y5
Year 4–5 — Publication
SAE J-XXXX Published
Fleet operators write SAE J-XXXX into procurement documents. Regulators can adopt by reference. Every competitor must meet criteria Surety defined.
1
Competitors meet our specification
Once SAE J-XXXX defines SR-A, every credible certification must meet those criteria. We defined them.
2
Procurement mandates create captive demand
Fleet operators, rental companies, and government pools will require SAE J-XXXX certification in tire procurement specs.
3
Regulatory adoption potential
NHTSA can adopt an SAE standard by reference. If that happens, certification becomes legally required for used tire resale at scale.
4
Authorship cannot be replicated
A competitor can copy the van, the sensors, and the algorithm. They cannot retroactively become the organisation that wrote the standard the industry adopted.
The Investment
$85–170k over 4 years — approximately $25–45k per year. Less than a single sales hire. Against the strategic value it creates, it is the highest-return investment Surety makes.
Get Started

Ready to put your
inventory to work?

◎
No commitment required
An initial conversation costs nothing. We explain how the scan process works, what to expect from sell-through, and how payment works — before you commit to anything.
⬡
First scan within 30 days
Once we've agreed the basics, we schedule your first scan at a time that suits your operation. Most first visits complete 200–400 tires in a single session.
✦
Direct line to the team
Reach us at inquiries@surety‑certified.com — we respond within one business day.
We are currently accepting a limited number of launch partners in our initial operating metros. If you have significant tire inventory and want to be among the first to list on Surety, get in touch now.