B2601 valve stems different?

[milanmark]

I have a B2601, left front tire looks low so I tried to check the pressure. Tire gage didn't fit, so I just tried putting air in, the inflator chuck didn't work either... something different with these? Tires were loaded when I bought it (new). Help please!

 

[MapleLeafFarmer]

I have a B2601, left front tire looks low so I tried to check the pressure. Tire gage didn't fit, so I just tried putting air in, the inflator chuck didn't work either... something different with these? Tires were loaded when I bought it (new). Help please!

Your dealer may have upgraded you to a more HD valve stem. Maybe a 16mm stem vs the lighter 11.5mm stem