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Match Tire Sizes For Proper Handling And Stability (HSN 0302-17)

Publication date: 2002-03-01
Reference number: HSN 0302-17

MATCH TIRE SIZES FOR PROPER HANDLING AND STABILITY

MATCH TIRE SIZES FOR PROPER HANDLING AND STABILITY

TECHNICAL SERVICE BULLETIN

Reference Number(s): HSN 0302-17, Date of Issue:  March 2002
HONDA: 1998-2002 Accord; 1997-2002 CR-V; 1999-2002 Odyssey; 1985-1991 Civic; 1997-2001 Prelude; 1994-2002 Passport; 2000-2002 Insight, S2000
CATEGORY: Honda Service News
APPLIES TO: See NOTE

SERVICE INFORMATION

NOTE: This article applies to these vehicles:
  • 1998-02 Accord V6 with ABS/TCS
  • 1997-02 CR-V 4WD with ABS
  • 1999-02 Odyssey with ABS/TCS
  • 1985-91 Civic 4WD with ABS
  • 1997-01 Prelude SH with ATTS and ABS
  • 1994-02 Passport 4WD with ABS
  • 2000-02 Insight with ABS
  • 2000-02 S2000 with ABS/limited slip differential

Vehicles with ABS, TCS, ATTS, 4WD, or limited slip differentials are sensitive to differences in tire circumference. Here are the reasons:

  1. ABS.  The ABS control unit monitors the speed of all four wheels to determine the rate of slippage when the brakes are applied. If the tire circumference differs, the control unit can interpret this difference as slippage. This can cause the ABS modulator to reduce pressure to the wheel with the undersize tire.
  2. TCS.  The TCS control unit monitors the speed of all four wheels to determine the rate of slippage when accelerating. If the tire circumference differs, the TCS control unit can misinterpret this difference as slippage. This can cause the TCS control unit to reduce the throttle opening or increase brake application to the undersize wheel.
  3. ATTS.  The ATTS control unit monitors the steering angle and the speed of all four wheels to determine the rate of slippage when turning and accelerating. If the tire circumference differs, the ATTS control unit can interpret this difference as slippage. This can cause the ATTS control unit to misinterpret the inputs and set a DTC.
  4. 4WD.  The 4-wheel drive mechanically connects the front and rear wheels together with a driveshaft. Differences in tire circumference can cause binding, noise, and premature driveline wear.
  5. Limited Slip Differential.  This system mechanically connects the driving wheels together. If the tire circumference differs, the vehicle can drift or pull on hard acceleration.

Here's an easy way to determine differences in loaded tire circumference:

  1. Inflate all four tires to the cold tire inflation pressure listed on the doorjamb sticker.
  2. Place a dab of grease on the center of each front tire.
  3. Roll the vehicle at least one full tire rotation, and measure the distance between grease spots.
  4. Repeat steps 2 and 3 for the rear tires.
  5. Compare the differences in rolling circumference. If the rolling circumference differs, replace tires so all four tires match.
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