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EXTREME MATERIALS INC
DBA: Knights Trucking
Summerville, SC
CarrierChk vetting signal
No flags raised
Authority, insurance, safety rating and crash records checked
FMCSA status: Active & Authorized · DOT 1905971 · MC 699110
No Safety Rating
Active 14 yrs, 7 mo
Broker Vetting Summary
Key signals from current FMCSA records
Authority
Active
MC-699110 · Common carrier
Insurance
On File
Zurich American Insurance Company
Safety
Not Rated
7.3% OOS · 147 inspections on record
✓ No risk flags found on authority or insurance records
Vetting notes
- Operating authority active for 14 yrs, 7 mo
- Insurance on file: $1,000,000
- Vehicle out-of-service rate 50.0% — above the 20.7% national average
- 147 FMCSA inspections on record
Authority & Compliance
Authority, insurance and required filings
Operating Authority
MC699110
Motor Carrier of Property (Except Household Goods) · $750,000 required
Insurance on File
ZURICH AMERICAN INSURANCE COMPANY
BI&PD · $1,000,000 · Policy BAP 0081053
Required Filings
Liability (BIPD)
$1,000,000
Company Information
Registration, contact and cargo details
FMCSA Registration
DOT Number
1905971
MC Number
MC-699110
Safety Rating
Not Rated
Operation Classification
Authorized for hire
MCS-150 Filed
February 10, 2025
FMCSA Registration
June 23, 2009
Authority Granted
February 3, 2012
Annual Mileage
2,143,000 mi (2025)
Contact Information
Address
480 Hodge Road, Summerville, SC 29483
Phone
Email
Owner / Officer
Thad Wharton
Officer 2
Michael B Knight
Cargo Types
General FreightBuilding MaterialsConstruction MaterialsOther Cargo
Safety Snapshot
Out-of-service rates, violations and crashes
Safety & Inspection Summary
Total Inspections
147
Driver Inspections
122
Vehicle Inspections
28
Out-of-Service Violations
15
Violations by Category
Vehicle Maintenance60
Unsafe Driving7
Hours of Service0
OOS Rates vs. National Average
Driver OOS Rate0.0% · national avg 5.5%
✓ Below national average
Vehicle OOS Rate50.0% · national avg 20.7%
⚠ Above national average (29.3pp higher)
7.3% of 96 inspections in the last 24 months put a driver or vehicle out of service —
18th percentile among carriers with 25–99 inspections (lower is better).
CarrierChk calculation from FMCSA roadside inspection records, not an FMCSA score.
Inspection Trend by Year
2026
2025
2024
Violation Rate by Category
Share of roadside inspections in FMCSA's rolling 24-month window that found a violation in each category. The individual violations are listed under each inspection in Inspection Details below. None of this is the basis of the safety rating, which comes from an on-site compliance review.
Vehicle Maintenance
12 of 15 inspections
Unsafe Driving
6 of 98 inspections
Hours of Service
0 of 98 inspections
Driver Fitness
0 of 98 inspections
Controlled Substances
0 of 98 inspections
Crash History (2)
Crashes reported to FMCSA in the last 24 months. A crash appearing here is a reported event, not a finding of fault.
2
Crashes
0
Fatalities
1
Injuries
2
Tow-aways
| Date | State | Fatal | Injured | Tow | Conditions |
|---|---|---|---|---|---|
| February 6, 2026 | SC | — | 1 | Yes | No Adverse Conditions · Dark - Not Lighted · Dry |
| June 26, 2025 | SC | — | — | Yes | No Adverse Conditions · Daylight · Dry |
Fleet & Operating Areas
Observed roadside activity and equipment
Where This Carrier Operates
States where this carrier's roadside inspections were recorded
FewerMore
SC121
GA2
Fleet & Equipment (62)
Vehicles identified in this carrier's inspection history. Year, make, model and equipment type are decoded from the VIN.
Power units
~38
of 38 reported to FMCSA
Trailers
~24
seen at inspection
Equipment types observed
Tractor
21
Truck
17
Tank
9
Semi-trailer
8
Dump
6
Trailer (type not listed)
1
Units on record
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| Unpublishe | Semi-trailer | 1A9AD3223SP432122 | 11 | — |
| 2021 Kenworth T880 | Truck · Class 8 | 1NKZXPEX6MJ458786 | 10 | — |
| Unpublishe | Semi-trailer | 1A9AD3221SP432121 | 7 | — |
| 2021 Kenworth T880 | Truck · Class 8 | 1NKZXPEX2MJ458784 | 7 | — |
| 2025 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV3SLVT8834 | 7 | — |
| 2025 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDVXSLVT8832 | 7 | — |
| 2022 International HX620 | Truck · Class 8 | 3HTPCTZT9NN303039 | 6 | — |
| 2025 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV1SLVT8833 | 6 | — |
| 2021 Kenworth T880 | Truck · Class 8 | 1NKZXPEX0MJ458783 | 5 | — |
| 2021 Kenworth T880 | Truck · Class 8 | 1NKZXPEX4MJ458785 | 5 | 1 |
Show all 62 units
| Vehicle | Type | VIN | Inspections | With OOS |
|---|---|---|---|---|
| 2025 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV5SLVT8835 | 5 | — |
| Unpublishe | Semi-trailer | 1A9AD3225SP432123 | 4 | — |
| 2020 International HX620 | Truck · Class 8 | 3HTDTAPT1LN864925 | 4 | 1 |
| 2020 International HX620 | Truck · Class 8 | 3HTDTAPT4LN864921 | 4 | 2 |
| 2020 International HX620 | Truck · Class 8 | 3HTDTAPTXLN864924 | 4 | 1 |
| 2022 International HX620 | Truck · Class 8 | 3HTPCTZT5NN303040 | 4 | — |
| 2022 International HX620 | Truck · Class 8 | 3HTPCTZT7NN303038 | 4 | 1 |
| 2019 Mack Anthem | Tractor · Class 8 | 1M1AN4GY5KM007899 | 3 | 1 |
| 1993 Kenworth K100 | Tractor · Class 8 | 1XK1P4TX1PJ244989 | 3 | — |
| 2025 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV6SLVT8830 | 3 | — |
| 2026 Mac Trailer Manufacturing | Dump · 34 ft | 5MADA3422TC086953 | 3 | — |
| 2026 Mac Trailer Manufacturing | Dump · 34 ft | 5MADA3427TC086950 | 3 | — |
| 2002 Fontaine Trailer Co. | Trailer (type not listed) · 50 ft | 13NE5040223512017 | 2 | — |
| 2020 Mack Anthem | Tractor · Class 8 | 1M1AN4GY9LM017448 | 2 | — |
| 2021 Kenworth T880 | Truck · Class 8 | 1NKZXPEX9MJ458782 | 2 | — |
| 2020 International HX620 | Truck · Class 8 | 3HTDTAPT8LN864923 | 2 | — |
| 2023 Kenworth T880 | Tractor · Class 8 | 3WKZD49X3PF275569 | 2 | 1 |
| 2023 Kenworth T880 | Tractor · Class 8 | 3WKZD49XXPF275570 | 2 | — |
| 2019 Terex Advance Mixer | Truck · Class 8 | 5DG8AD5T3K0015488 | 2 | — |
| 2004 Heil Trailer International | Tank · 42 ft | 5HTSN422X47T10066 | 2 | 1 |
| 2026 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV2TLWP8388 | 2 | — |
| 2026 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV4TLWP8389 | 2 | — |
| 2026 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV6TLWP8393 | 2 | — |
| 2025 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV8SLVT8831 | 2 | — |
| 2026 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV9TLWP8386 | 2 | — |
| 2022 Mac Trailer Manufacturing | Tank · 42 ft | 5MATA4222NX062765 | 2 | — |
| 2022 Mac Trailer Manufacturing | Tank · 42 ft | 5MATA4223NX062760 | 2 | — |
| 2019 Mac Trailer Manufacturing | Tank · 42 ft | 5MATA422XKA045338 | 2 | — |
| Mack Trail | Semi-trailer | 5MATA422XSX077574 | 2 | — |
| 2018 Oshkosh Concrete | Truck · Class 8 | 10TAFLGF8JS787120 | 1 | — |
| Rhodes | Semi-trailer | 1A9AD322XSP432120 | 1 | — |
| Unpublishe | Semi-trailer | 1A9SD3221SP432124 | 1 | — |
| 2019 Mack Anthem | Tractor · Class 8 | 1M1AN4GY3KM007898 | 1 | — |
| 2020 Mack Anthem | Tractor · Class 8 | 1M1AN4GY5LM017446 | 1 | — |
| 2018 Mack CXU (Pinnacle) | Tractor · Class 8 | 1M1AW07Y3JM087241 | 1 | — |
| 2021 Kenworth T880 | Truck · Class 8 | 1NKZXPEX7MJ458781 | 1 | — |
| 2022 International HX620 | Tractor · Class 8 | 3HSPCTZR3NN303045 | 1 | — |
| 2020 International HX620 | Truck · Class 8 | 3HTDTAPT6LN864922 | 1 | — |
| Unknown | Semi-trailer | 4U181AHX3W1X35693 | 1 | — |
| 2016 Mac | Tank · 42 ft | 558MGAM20GK001840 | 1 | — |
| 2019 Terex Advance Mixer | Truck · Class 8 | 5DG8AD5T2K0015725 | 1 | — |
| 1997 Heil Trailer International | Tank · 41 ft | 5HTSN4121V7T04949 | 1 | 1 |
| 2000 Heil Trailer International | Tank · 41 ft | 5HTSN4122Y7T06617 | 1 | — |
| 2005 Heil Trailer International | Tank · 42 ft | 5HTSN422057T10482 | 1 | — |
| 2026 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV2TLWP8391 | 1 | — |
| 2026 Western Star 49X Chassis | Tractor · Class 8 | 5KJJBWDV4TLWP8392 | 1 | — |
| 2026 Mac Trailer Manufacturing | Dump · 34 ft | 5MADA3420TC086952 | 1 | — |
| 2021 Mac Trailer Manufacturing | Dump · 34 ft | 5MADA3422MC059737 | 1 | — |
| 2018 Mac Trailer Manufacturing | Dump · 34 ft | 5MADA3423JC042862 | 1 | — |
| 2026 Mac Trailer Manufacturing | Dump · 34 ft | 5MADA3429TC086951 | 1 | — |
| Unknown | Semi-trailer | 5MATA4220JA043483 | 1 | — |
| 2020 Mac Trailer Manufacturing | Tank · 42 ft | 5MATA4229LA049754 | 1 | — |
A vehicle appearing here was recorded in an inspection — it is not proof the carrier still operates it today.
Inspection Details
Each roadside inspection with its violations
Inspection Records (147)
| Date | Report # | Location | Level | Viol | OOS | Shipper | Unit Type | Make | VIN | License |
|---|---|---|---|---|---|---|---|---|---|---|
| September 15, 2026 | 0365003677 | LEXINGTON SC | III | 3 | — | — | Truck Tractor Semi-trailer |
WESTERN STAR UNPUBLISHE |
5KJJBWDV1SLVT8833 1A9AD3221SP432121 |
SC A007925 SC 112265PT |
| 392.2-SLLS1 | State/Local Laws - Speeding 1-5 miles per hour over the speed limit | |||||||||
| 392.2-SLLIRP | State/Local Laws - IRP apportioned tag or registration violation | |||||||||
| 392.2-SLLSIV | State/Local Laws - State insurance violation | |||||||||
| August 25, 2026 | 0412000815 | ST GEORGE SC | I | — | — | — | Truck Tractor Semi-trailer |
WESTERN STAR MAC TRAILER MANUFACTURING |
5KJJBWDV2TLWP8391 5MADA3429TC086951 |
SC P913987 SC 123622PT |
| August 21, 2026 | 0321003698 | LEXINGTON SC | III | 1 | — | MARTIN MARIETTA | Straight Truck |
INTERNATIONAL |
3HTPCTZT7NN303038 |
SC P836979 |
| 392.2-SLLML | State/Local Laws - Failure to maintain lane | Dangerous Driving | ||||||||
| August 20, 2026 | 0412000810 | SAINT GEORGE SC | III | 1 | — | VULCAN MATERIALS | Truck Tractor Semi-trailer |
WESTERN STAR UNPUBLISHE |
5KJJBWDVXSLVT8832 1A9AD3223SP432122 |
SC A007922 SC 112249PT |
| 392.2-SLLEWG2 | State/Local Laws - Excessive weight - 2501-5000 lbs over on allowable gross weight | |||||||||
| August 18, 2026 | 0358002761 | LEXINGTON SC | III | 1 | — | SAME AS CARRIER | Truck Tractor Semi-trailer |
WESTERN STAR UNPUBLISHE |
5KJJBWDV1SLVT8833 1A9AD3221SP432121 |
SC A007925 SC 112265PT |
| 392.2-SLLEWA1 | State/Local Laws - Excessive weight - 1-2500 lbs over on an axle/axle groups | |||||||||
| July 16, 2026 | 0349003449 | HARLEYVILLE SC | III | 1 | — | VULCAN MATERIALS COMPANY | Truck Tractor Semi-trailer |
INTERNATIONAL MAC TRAILER MANUFACTURING |
3HSPCTZR3NN303045 5MADA3422MC059737 |
SC P917662 SC 72656PT |
| 392.2-SLLEWA3 | State/Local Laws - Excessive weight - More than 5000 lbs over on an axle/axle groups | |||||||||
| July 15, 2026 | 0408000980 | HARLEYVILLE SC | II | 4 | — | VULCAN | Truck Tractor Semi-trailer |
WESTERN STAR MAC TRAILER MANUFACTURING |
5KJJBWDV6SLVT8830 5MADA3427TC086950 |
SC A007920 SC 123644PT |
| 393.11A1-CSLRR | Conspicuity Systems - Truck tractor, lower rear retro reflective sheeting missing on vehicle manufactured on or after July 1, 1997 | Reflective Sheeting | ||||||||
| 393.11A1-CSURR | Conspicuity Systems - Truck tractor, upper rear retro reflective sheeting missing on vehicle manufactured on or after July 1, 1997 | Reflective Sheeting | ||||||||
| 393.209E-SPSLA | Steering - Power steering leaking anywhere. | Steering Mechanism | ||||||||
| 393.78A-WS | Washers - Inoperative washing system. | Windshield/ Glass/ Markings | ||||||||
| July 15, 2026 | 0340002901 | SUMMERVILLE SC | III | 1 | — | MARTIN MARIETTA | Straight Truck |
KENWORTH |
1NKZXPEX4MJ458785 |
SC P535232 |
| 392.2-SLLEWG2 | State/Local Laws - Excessive weight - 2501-5000 lbs over on allowable gross weight | |||||||||
| July 8, 2026 | 0328001158 | RIDGEWAY SC | III | — | — | — | Truck Tractor Semi-trailer |
WESTERN STAR UNPUBLISHE |
5KJJBWDV1SLVT8833 1A9AD3221SP432121 |
SC A007925 SC 112265PT |
| July 7, 2026 | 0340002870 | HARLEYVILLE SC | III | — | — | HEIDELBERG MATERIALS | Truck Tractor Semi-trailer |
KENWORTH MAC TRAILER MANUFACTURING |
3WKZD49XXPF275570 5MATA4223NX062760 |
SC A000612 SC 105513PT |
Shippers Seen at Inspections
Shipper names recorded by roadside inspectors over roughly the last three years. Only inspected loads appear, so this is a sample of who the carrier hauls for, not a complete customer list. Names are as entered at the roadside; blanks and placeholders such as “N/A” or “same as carrier” are left out.
| Shipper | Inspections | Most recent |
|---|---|---|
| MARTIN MARIETTA | 20 | August 21, 2026 |
| VULCAN | 10 | July 15, 2026 |
| AMC | 5 | January 8, 2026 |
| GIANT CEMENT COMPANY | 5 | November 28, 2023 |
| HEIDELBERG MATERIALS | 4 | July 7, 2026 |
| VULCAN MATERIALS | 2 | August 20, 2026 |
| KNIGHTS REDI MIX INC | 2 | June 11, 2026 |
| HMS ENTERPRISES | 1 | February 26, 2026 |
| NATIONAL CEMENT | 1 | February 20, 2025 |
| MURRAY MINES, INC | 1 | November 11, 2024 |
| SANDWORKS | 1 | August 20, 2024 |
| KNIGHRS REDI MIX | 1 | July 8, 2024 |
4 more shippers named at fewer inspections.
History & Filings
Authority, insurance and process-agent records
Authority History
| Date | Status | Type |
|---|---|---|
| November 22, 2023 | INVOLUNTARY REVOCATION | Common |
| February 3, 2012 | GRANTED | Common Carrier |
| January 27, 2010 | DISMISSED | Contract Carrier |
Insurance & Revocation Filings
| Date | Type | Status |
|---|---|---|
| March 1, 2017 | BI&PD Primary/Excess | On file |
BOC-3 Process Agent
#1 A $20 BOC-3 Filing LLC
6300 E HAMPDEN AVE # C-222 # C-222, Denver, CO, 80222-7678
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Data sourced from FMCSA MCMIS via Socrata. Record last updated: September 20, 2026.
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