Review on 🔧 Schwalbe SV15 700C Inner Tube: Ensuring Optimum Performance and Quality by Uriel Arocha

When I first installed these hoses, one lost over 30 pounds of pressure in one day and the other about 15 pounds. I thought one tube must be defective and was very disappointed with how the others worked. I removed the hoses from the bike and checked for leaks. I haven't found any. Eventually I gave up and decided to return them. I loosened the lock nut on a Presta-rated hose to deflate in preparation for repacking and felt the valve give out a bit. I didn't realize that these hoses have replaceable valve cores (although this is stated in the product description). As it turned out, both valve cores were slightly loose. I took them off, smeared silicone grease on the seats and reinstalled them. Since then they've been working great. If I buy these tubes in the future I will service the valve cores before installing them. They fit perfectly with my Schwalbe Ultremo DD tires. However, I would like Revain to carry SV20 tubes (65g vs 105g).