YONKERS, N.Y. (Dec. 8, 2003) – Consumer Reports (CR) magazine has published in its January 2004 issue a primer on plus-sizing tires and wheels.
The two-page article looks at the pros and cons of plus-sizing, with a separate look at the special risks for SUV owners.
In general, the authors state that Plus-One sizing – moving to a lower profile tire/wheel combination one inch larger in wheel diameter – offers the most performance gain with the fewest sacrifices.
Among the cons in going to extreme fitments: loss of ride comfort, hyroplaning resistance and snow traction and increased danger of wheel damage from pot holes.
Owners of SUVs and pickups face the additional risk that such vehicles may become more susceptible to rollover with plus-sized tires because the added grip of wider tires may upset the vehicles' balance in extreme maneuvers.
Extreme fitment changes (Plus Four or more) also usually involve additional unsprung weight, putting strain on brakes, wheel bearings and suspension parts, CR cautions.