I don't like slime, all it really does is cause a mess. A decent tire, properly inflated is half the battle. Yes, liners help, but they are a pain to mount. Because of that, I only use a liner on the rear wheel. The rear is a pain to get off on the road and gets your hands black and greasy. I don't use a liner on the front. I can repair a front wheel flat on the road in less than 15 minutes.