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ST909
Optimized Regional Drive

The new ST909 is Sumitomo's most advanced S-Tech Design drive tire for regional applications. With the latest design elements, the ST909 provides superior traction, more miles per 32nd and an extra wide tread face for increased vehicle stability. Exceptional performance and outstanding retreadability are strengths of the line.

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S-Tech design
6 YEAR Warranty
  • 6 Years from Original Purchase Date*
  • 2 Recap Casing Warranty*
*DOWNLOAD WARRANTY INFO FOR DETAILS AND EXCLUSIONS Print Product Sheet
TIRE CONSTRUCTION
  1. Significantly wider tread face for consistent retreadability, with wide, solid shoulders that evenly dispense contact pressure for long, even wear
  2. Advanced Y-Shape groove design improves stone ejection, traction and promotes longer life of the casing
  3. Deep shoulder blocks for increased traction
  4. Stone ejectors to minimize stone drilling and protect the casing
  5. Four Steel Belt Package - resists punctures, increases vehicle stability, and contributes to more retread cycles
TIRE CONSTRUCTION
Tire Specifications
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TIRE SIZE
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Tire Specifications

255/70R22.5 Change Size View all Sizes and Specs
  • SIZE 255/70R22.5
  • PLY RATING 16
  • SERVICE DESCRIPTION 140/137M
  • MAX SPEED 81
  • TREAD DEPTH 26
PRODUCT CODESUMI-5533075
TIRE SIZE255/70R22.5
SERVICE DESCRIPTION140/137M
LOAD RANGE/PLYH/16
PREF. RIM WIDTH (INCH)7.50
MIN. RIM WIDTH (INCH)6.75
SINGLE MAX LOAD (LBS.)5510
REVS PER MILE562
DUAL MAX LOAD (LBS.)5070
I.P. (PSI)120
OVERALL DIAMETER (INCH)36.9
SECTION WIDTH (INCH)9.9
MIN. DUAL SPACING (INCH)11.3
TREAD DEPTH (X/32")  26
STATIC LOADED RADIUS17.3
MAX SPEED (MPH)81

Tire Specifications

285/75R24.5 Change Size View all Sizes and Specs
  • SIZE 285/75R24.5
  • PLY RATING 14
  • SERVICE DESCRIPTION 144/141L
  • MAX SPEED 75
  • TREAD DEPTH 28
PRODUCT CODESUMI-5533078
TIRE SIZE285/75R24.5
SERVICE DESCRIPTION144/141L
LOAD RANGE/PLYG/14
PREF. RIM WIDTH (INCH)8.25
MIN. RIM WIDTH (INCH)7.50
SINGLE MAX LOAD (LBS.)6175
REVS PER MILE495
DUAL MAX LOAD (LBS.)5675
I.P. (PSI)110
OVERALL DIAMETER (INCH)42.1
SECTION WIDTH (INCH)10.8
MIN. DUAL SPACING (INCH)12.5
TREAD DEPTH (X/32")  28
STATIC LOADED RADIUS19.7
MAX SPEED (MPH)75

Tire Specifications

225/70R19.5 Change Size View all Sizes and Specs
  • SIZE 225/70R19.5
  • PLY RATING 14
  • SERVICE DESCRIPTION 128/126N
  • MAX SPEED 87
  • TREAD DEPTH 22
PRODUCT CODESUMI-5533082
TIRE SIZE225/70R19.5
SERVICE DESCRIPTION128/126N
LOAD RANGE/PLYG/14
PREF. RIM WIDTH (INCH)6.75
MIN. RIM WIDTH (INCH)6.00
SINGLE MAX LOAD (LBS.)3970
REVS PER MILE644
DUAL MAX LOAD (LBS.)3750
I.P. (PSI)110
OVERALL DIAMETER (INCH)32.3
SECTION WIDTH (INCH)8.7
MIN. DUAL SPACING (INCH)10.0
TREAD DEPTH (X/32")  22
STATIC LOADED RADIUS14.3
MAX SPEED (MPH)87

Tire Specifications

245/70R19.5 Change Size View all Sizes and Specs
  • SIZE 245/70R19.5
  • PLY RATING 16
  • SERVICE DESCRIPTION 136/134N
  • MAX SPEED 87
  • TREAD DEPTH 22
PRODUCT CODESUMI-5533086
TIRE SIZE245/70R19.5
SERVICE DESCRIPTION136/134N
LOAD RANGE/PLYH/16
PREF. RIM WIDTH (INCH)7.50
MIN. RIM WIDTH (INCH)6.75
SINGLE MAX LOAD (LBS.)4940
REVS PER MILE620
DUAL MAX LOAD (LBS.)4675
I.P. (PSI)120
OVERALL DIAMETER (INCH)33.5
SECTION WIDTH (INCH)9.5
MIN. DUAL SPACING (INCH)11.0
TREAD DEPTH (X/32")  22
STATIC LOADED RADIUS15.6
MAX SPEED (MPH)87

Tire Specifications

12R22.5 Change Size View all Sizes and Specs
  • SIZE 12R22.5
  • PLY RATING 16
  • SERVICE DESCRIPTION 152/149L
  • MAX SPEED 75
  • TREAD DEPTH 28
PRODUCT CODESUMI-5533055
TIRE SIZE12R22.5
SERVICE DESCRIPTION152/149L
LOAD RANGE/PLYH/16
PREF. RIM WIDTH (INCH)9.00
MIN. RIM WIDTH (INCH)8.25
SINGLE MAX LOAD (LBS.)7830
REVS PER MILE486
DUAL MAX LOAD (LBS.)7160
I.P. (PSI)123
OVERALL DIAMETER (INCH)43.0
SECTION WIDTH (INCH)12.0
MIN. DUAL SPACING (INCH)13.5
TREAD DEPTH (X/32")  28
STATIC LOADED RADIUS20.0
MAX SPEED (MPH)75

Tire Specifications

11R24.5 Change Size View all Sizes and Specs
  • SIZE 11R24.5
  • PLY RATING 16
  • SERVICE DESCRIPTION 149/146L
  • MAX SPEED 75
  • TREAD DEPTH 28
PRODUCT CODESUMI-5533059
TIRE SIZE11R24.5
SERVICE DESCRIPTION149/146L
LOAD RANGE/PLYH/16
PREF. RIM WIDTH (INCH)8.25
MIN. RIM WIDTH (INCH)7.50
SINGLE MAX LOAD (LBS.)7160
REVS PER MILE470
DUAL MAX LOAD (LBS.)6610
I.P. (PSI)120
OVERALL DIAMETER (INCH)44.2
SECTION WIDTH (INCH)11.1
MIN. DUAL SPACING (INCH)12.5
TREAD DEPTH (X/32")  28
STATIC LOADED RADIUS20.7
MAX SPEED (MPH)75

Tire Specifications

295/75R22.5 Change Size View all Sizes and Specs
  • SIZE 295/75R22.5
  • PLY RATING 16
  • SERVICE DESCRIPTION 146/143L
  • MAX SPEED 75
  • TREAD DEPTH 28
PRODUCT CODESUMI-5533087
TIRE SIZE295/75R22.5
SERVICE DESCRIPTION146/143L
LOAD RANGE/PLYH/16
PREF. RIM WIDTH (INCH)9.00
MIN. RIM WIDTH (INCH)8.25
SINGLE MAX LOAD (LBS.)6610
REVS PER MILE511
DUAL MAX LOAD (LBS.)6005
I.P. (PSI)120
OVERALL DIAMETER (INCH)40.7
SECTION WIDTH (INCH)11.4
MIN. DUAL SPACING (INCH)13.2
TREAD DEPTH (X/32")  28
STATIC LOADED RADIUS19.0
MAX SPEED (MPH)75

Tire Specifications

11R22.5 Change Size View all Sizes and Specs
  • SIZE 11R22.5
  • PLY RATING 16
  • SERVICE DESCRIPTION 146/143L
  • MAX SPEED 75
  • TREAD DEPTH 28
PRODUCT CODESUMI-5533052
TIRE SIZE11R22.5
SERVICE DESCRIPTION146/143L
LOAD RANGE/PLYH/16
PREF. RIM WIDTH (INCH)8.25
MIN. RIM WIDTH (INCH)7.50
SINGLE MAX LOAD (LBS.)6610
REVS PER MILE493
DUAL MAX LOAD (LBS.)6005
I.P. (PSI)120
OVERALL DIAMETER (INCH)42.1
SECTION WIDTH (INCH)11.1
MIN. DUAL SPACING (INCH)12.5
TREAD DEPTH (X/32")  28
STATIC LOADED RADIUS19.6
MAX SPEED (MPH)75

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*Exclusions apply. Click here for full warranty details.