For those of you that use Ride-On Tire Sealant or want to try it, I worked out a group buy to get 10% off your order. The discount is good for any order of any product. So, here's how it works: The group buy is no longer functioning but it's still a good product. I'll work on getting a new code and will update here. (edited Nov 2015) Here's my little testimonial YMMV: I really like the Ride-On, I've used it for coming on eight years now. I know it works on punctures, which saves all kinds of head-ache on a trip, because I've picked up nails and been able to keep on riding. I first bought Ride-On because I was planning a big solo trip and was worried about flats. On that trip I picked up a nail. I did my tire check each morning and one morning I'd lost 2 pounds of air. I checked out the tire and found the nail, aired it back up and it kept pressure the rest of the trip (another 1000 miles) with only Ride-On - no patches or plugs. BTW, that was a tubed tire and it sealed the tube - that was pretty impressive and from then on I was convinced that it's good stuff. I also think it improves tire balance, wear and mileage. The few times when I've put on new tires and not used it (because I didn't have any on hand and didn't get around to ordering it), I've found that the tires wear much less evenly and much more quickly. With the Ride-On, I get about 1/3 more wear out of a tire. That makes the extra $$ per change worth it right there. Plus, b/c Ride-On stays liquid, it works as a dynamic balancer for a smoother ride as well. Finally, I've had no problems with Ride-On being in any way corrosive (unlike Slime - bad stuff, stay away) and it handles high speeds with no problems (trust me, I've pushed it to triple digits). It's not even terribly messy when you pull off the tire and washes right out with a quick spray of the hose. So, I like the stuff 'cause it works for me. YMMV but I put together the group buy for another forum and figured some of the folks here might benefit as well.