I think it sipped in more on the side where the protection is thinner. Schwalbe Marathon Plus Smartguard then of course I use a co2 cartridge and the new tube won't pump up. so I had to find the hole on the first tube and patch it . of course I am late getting home and it is dark and 40 degrees. its been maybe 8 years since I changed a tire so it took a bit. but I found my lumos helmet worked great as a light to help it all out.