Technical
Bulletin

Trailer Suspension Systems


SUBJECT: Wide Base Tires and Wheels

LIT NO: L846 
DATE: September 2017
REVISION: A
Wide Base “super single” tires (such as the
445/50R22.5 and the 455/50R22.5) require a 14" wide
rim that is currently available with a zero, 1.13" or 2"
offset. The width of the tires, along with the available
wheel offsets, result in tire width spacings that should
be considered when choosing a trailer suspension.
Examples of these variations are described below:

WHEEL SPACING
Out-to-Out

Out-to-Out

Track

Track
In-to-In

In-to-In

Dual
offset

Tire
width

Tire
width

Dual Illustration

Single Illustration
Figure 1: Tire-to-tire dimension

The values in the table on the next page show the dimensions illustrated above with the following wheel
arrangements:
•

Ductile hub

•

Cast Drum

•

Aluminum wheel

•

•

Dual wheels −− 275/80R22.5 tire
−− 22.5” x 8.25” rim
−− Zero offset

Wide base single wheels
−− 445/55R22.5 tire (17.6” width)
−− 22.5” x 14” rim
−− Offsets vary as shown

Wide Base Tires and Wheels 
WHEEL OFFSET

TIRE WIDTH

OUT-TO-OUT 1, 2

TRACK (U.S.)

IN-TO-IN 1

78.42"

54.29"

94.15"

76.55"

58.95"

96.41"

78.81"

61.21"

98.15"

80.55"

62.95"

82.55"

64.95"

DUAL WHEELS @ 77.5" Axle Track
Zero

10.89"

102.55"
WIDE BASE SINGLE @ 77.5" Axle Track

Zero
1.13"

17.30"

2.00"

WIDE BASE SINGLE @ 83.5" Axle Track
Zero
1
2

17.30"

100.15"

The OUT-TO-OUT and IN-TO-IN values will change if a different width tire is used (Figure 1).
The tire OUT-TO-OUT dimension corresponds to the Canadian Memorandum of Understanding definition of axle track. Canada requires a 2.5 meter
(98.4") minimum OUT-TO-OUT (i.e. track) width. Some wheel component combinations may be used to meet this requirement with a 77.5" nominal
(U.S.) axle track, but the 83.5" nominal (U.S.) axle track is typically recommended.

NOTE: Reductions in the tire track spacing could have
an impact on overall trailer stability and should
be reviewed for each application.

considered. Hendrickson INTRAAX®, VANTRAAX® and
ULTRAA-K® axle and axle components are rated for
these wheel offsets as follows:

AXLE RATINGS

In addition to the tire spacing, the impact of the wheel
offset on the axle and axle components must be
ORIGINAL
RATING
(ZERO OFFSET)

For 1.13" and 2.00" wheel offsets
OFFSET RATING 1

DUTY

5" Dia. Axle

Axle Wall

LDA (5.75" Dia.)

Axle Wall

N/A

N/A

40K 2

.310

23K

20K 2,3

.460"

20K 2

40K

34K 4, 3

.420"

46K

40K 2, 3

.460"

ULTRAA-K® (HP spindle only)
40K

STD

VANTRAAX (HP spindles only)
®

50K

STD

.562"
40K

69K23

2,3

.460"

69K25

.562"

40K

.562"

46K

HVY

40K 2

40K

.562"

2,3

50K

.310
.367

40K

2

.310
.367
.310

40K

2

.625"

.310
.367

INTRAAX® (HP spindles only)
20K (AANLS)

STD

23K
25K
30K (AAL & T)

4

20K

.460"

20K

2

20K

2

N/A

.562"

20K 2,3

.562"

.310
.367
.367

20K

.625"

N/A

23K

20K 2

.562"

.310

30K (AAL & T)

3

N/A

30K (EDL & T)

30K (EDL & T)
2

.460

2,3

2

25K

1

STD

20K 2

HVY

.625"

20K 2,3

.625"

20K 2

N/A

20K 2

.367
.367
N/A

No change in the suspension component ratings (e.g., suspension beams, air springs, etc.) unless otherwise noted below.
Rating limited by the spindle bearing rating.
No longer an available option.
Capacity limited by axle rating.

2

L846 A

Wide Base Tires and Wheels
SPINDLE BEARING RATINGS
SPINDLE TYPE

WHEEL OFFSET
Zero

HN

1.13"
2.00"
Zero

HP

1.13"
2.00"
Zero

P90

1.13"
2.00"

OTHER WHEEL OFFSET AMOUNTS

Contact Hendrickson’s Product Engineering Department
for reduced axle ratings when other wheel offsets are
used. Hendrickson cannot provide a revised rating for
the spindle bearings. Spindle bearings used with offset
wheels should be inspected more frequently due to the
reduction in predicted operating life of the bearing.

LOAD RATING

Same as axle rating
Not Approved
Same as axle rating

NOTE:

20,000 lbs. max

• The actual axle rating should be determined
by reviewing all of the components attached to
the axle including the hubs and tires.

Same as axle rating
20,000 lbs. max

• The standard suspension system warranty
as stated in Hendrickson literature number
L583 Comprehensive Warranty Statement
will continue to apply to those components
supplied by Hendrickson when the system is
operated within the parameters noted above
and installed and operated per Hendrickson’s
recommendations. This would include the
standard one-year coverage for wheel hubs
and bearings when installed by Hendrickson.

The above rating limits apply to systems where
Hendrickson supplies the spindle bearings. For
components not supplied by Hendrickson, we
recommend that the anticipated component
performance be reviewed with the respective
component manufacturer.

BRAKE RATINGS

For 1.13" and 2.00" Wheel Offsets

• Contact Hendrickson concerning the availability
of extended service warranty options for offset
wheels.

Use of offset wheels does not affect Hendrickson’s brake
ratings. See L809 Brake Certifications for a complete
listing of brake types and their ratings.

L846 A

3

Call Hendrickson at 866.RIDEAIR (743.3247) for additional information.

www.hendrickson-intl.com
L846 Rev A 09-17 ECN 30318

TRAILER COMMERCIAL VEHICLE SYSTEMS
2070 Industrial Place SE
Canton, OH 44707-2641 USA
866.RIDEAIR (743.3247)
330.489.0045 • Fax 800.696.4416

Hendrickson Canada
250 Chrysler Drive, Unit #3
Brampton, ON Canada L6S 6B6
800.668.5360
905.789.1030 • Fax 905.789.1033

Hendrickson Mexicana
Circuito El Marqués Sur #29
Parque Industrial El Marqués
Pob. El Colorado, Municipio El Marqués,
Querétaro, México C.P. 76246
+52 (442) 296.3600 • Fax +52 (442) 296.3601

01-04

Information contained in this literature was accurate at the time of publication. Product changes may have been made after the copyright date that are not reflected.

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