This is your basic, workhorse tube featuring a durable 0.9mm wall thickness. Two valve options: Presta and Shrader. The presta valve features a removable valve core, and a 48mm valve length which will fit most rim depths. These tubes are recommended for 29" tires in the 2.1" - 2.3" range, although they will easily inflate reliably in tires up to 2.6".