I got them because it is very difficult to keep the tire inflated on my car. When the pressure is low, for example at the end of winter, when you attach the air pump, the valve stem wants to get into the hole in the rim, and pumping it up is a chore. I thought these extensions would make things easier, but they were tricky to install, never seated properly on the inner tube valve stem and would not let air through. Couldn't use them successfully with an air pump. So at least for that purpose I don't recommend them.
π Enhanced Traction Goodyear Wrangler DuraTrac 265/65R17 All-Season Radial Tire - 112S
28 Review
Goodyear EfficientGrip Performance 2 205/55 R16 94W summer
32 Review
π Hankook 305/45R22 118V Ventus ST RH06 All-Season Tire
19 Review
Car tires Sailun Atrezzo Elite 215/55 R17 94V TL
28 Review