Topic: Fitting the Dunlop SPORTMAX Q5A (150/70ZR18) and measuring its actual physical width. Details: Today’s footwork log features a Dunlop Q5A rear tire installation on a Suzuki GS1000S. Although the nominal size indicates a 150mm section width, mounting it on the rim and inflating to operational pressure revealed an actual measured width of 162mm (+12mm wider than nominal). On classic chassis, an extra 12mm can easily cause dangerous tire contact with the drive chain, torque rod, or chain guard. We carefully checked all clearances using digital calipers, verifying zero friction and optimal drive-line alignment. Verdict: Never rely solely on nominal tire numbers. Verifying real-world measurements on the rim is essential for safe, high-performance radial tire conversions!