Tag Archives: tire sealant

Revolutionary products in this review include the Carlito bike lock and the Flat Stopper's amazing new tubeless bike tire sealant.

Revolutionary products the Carlito bike lock and Flat Stoppers tire sealant

By John Brown, HaveFunBiking.com

It’s been about two months since the Interbike show and there are a couple of new products I am excited to share. Each year I go to the show to find the most technologically impressive products there. This year was no exception and there were two new products that I have spoken with friends about that were created by inventors who looked at a certain problem in a new way. The first is the Rocky Mounts Carlito bicycle lock and the second is the Flat Stopper Tire Sealant kit. Read on for more details.

Rocky Mounts Carlito Bike Lock is one of two revolutionary products

Rocky Mounts is best known for their car racks, but recently they have moved into bike locks as well. Their line of bike locks covers all the basic options and introduces an all new concept. That Concept, is the Carlito lock. The bike lock looks like a standard mini U-lock but incorporates some really cool features. First, Rocky Mounts chose silicon for the cover material. Therefore, the Carlito lock is softer on paint while being more durable than a vinyl covered lock. More importantly, what makes the Carlito so cool is the material they use for the lock itself. Rather than using hardened steel for the construction, they employ aluminum alloy. While aluminum is not as durable as steel, it’s half the weight. So for anyone looking for the visual security of a U-lock at half the weight, the Carlito is an amazing option.

Carlito Lock

(left) Carlito lock and Key (top right) and U (bottom right) detail.

Flat Stopper tire sealant is also impressive

Tubeless tires are now a standard feature on every category of bike. Almost all tubeless systems use the same type of Latex based sealant to seal punctures and keep the tires airtight. Where The Flat Stopper differs is that it is not Latex based. In fact, rather than latex they use completely inert ingredients that contain no ozone depleting chemicals and aren’t carcinogenic or flammable. Moreover, it’s actually a water based system. While their exact recipe is a secret, I did get some inside info on how their sealant works. Apparently, rather than relying on latex to dry out and seal like most systems, Flat Stopper works through pressure. Therefore, once the sealant gets forced into a puncture (by the tire’s internal air pressure) it immediately seals the hole permanently.

Flat Stopper Sealant

Flat Stopper’s clean packaging (left) is perfect for quickly filling your tires with sealant. On the right is a close up of what Flat Stopper looks like up close.

Connecting Thread

The thing I like most about both these two products, they are a totally new approach to existing solutions and the problems they are suppose to solve. The Carlito bicycle lock offers moderate physical security as well as a high level of visual security all while weighing practically nothing, making this new approach to security exciting to see.

Similarly, some of the biggest issues with sealants today are related to their caustic ingredients, slow response and generally messy setup. Flat stopper has eliminated all those issues with almost no downside. Stay tuned for more in depth reviews of the Carlito and Flat Stopper in the near future.

Tubeless tires on bicycles: The basics of this exciting new technology

by John Brown, HaveFunBiking.com

In the spring of 1999 the french rim maker MAVIC launched the first viable bicycle tubeless system. By working closely with their french neighbor, the tire maker Hutchinson, they engineered a simple system that could give riders the benefits of larger air volume, greater traction, lighter weight and greater durability that tubeless systems offer. Since 1999, tubeless has evolved to be lighter, more serviceable, and lighter.

Now, with more bicycles coming from the manufacturer with these tires as standard equipment, please read on to see how the current family of tubeless systems can benefit you.

What are tubeless tires

Tubeless tires are exactly what they sound like, tires that use no innertubes. Specifically, these tire and rim systems use the air pressure, combined with a sealant, to keep your tires seated and inflated on the rim.

Why tubeless

There are a few reasons as to why tubeless tires have become popular. In essence, they are less prone to flats, they ride more comfortably, they are lighter and they offer better traction.

Less flats

Tubeless tires protect against the most common type of flat tire, a pinch flat. How a pinch flat works is the tire is compressed between a solid object and the rim. When compressed the rim and object work like scisors and cut a hole in the innertube. Considering tubeless tires have no innertube, they cannot pinchflat. This isn’t to say you cannot cut the tire in the same circumstance, but that is far less likely.

Tubeless Tires

The innertube on the left (blue) is susceptible to pinchflats, while the tubeless setup on the right is immune.

Less weight

Innertubes are relatively heavy. The pair can easily weigh a pound. While a pound may not sound like a lt of weight, we need to consider were that weight is. Tires, tubes, and rims have a profound effect on the feel of a bike. Heavy rims, tubes or tires can make the bike feel very heavy (even if it’s overall weight is low). The reason for this is that when you pedal, the weight you are constantly accelerating, only to have it decelerate and need to be accelerated again is rotating weight (ie. Rim, tire, tube). Reducing the rotating weight will decrease the mass you need to constantly accelerate, and lead to a lighter riding bicycle.

More comfot

By doing away with the innertube, you automatically increase the air volume of the tire. This increased air volume allows for a greater degree of flex in the tire when you ride over objects. Increaseing that flex allows the bike to more comfortably float across road and trail.


More traction

Tires and tubes don’t actually play well together. A tire is built with high thread count fabrics that are designed to conform over objects, but not collapse under the efforts of turning and pedaling. That delicate balancing act is made more difficult when you introduce an innertube. An inflated innertube will press against the inner surface of the tire an hinder it from conforming over objects. This is because that pressure creates friction between the tire attempting to conform, and the tube exerting force on it. This, if you eliminate the tube, the tire is free to do what it was intended to do

Tubeless Tires

Air Pressure (Green) forces the tube into the tire causing friction (Red)

Types of tubeless tires

There are two primary tubless systems. Tubeless, and Tubeless-ready. A true tubeless system (like the tires on most automobiles) requires no sealant to inflate the tire. The tire is built with a airtight material grafted to the inner surface. Tubeless-ready tires require you to use a sealant because they have no airtight material applied. Overall, the tubeless-ready tires has become more popular because they ride better, are lighter and less expensive. For all those benefits, the trade off is that a sticky solution must be installed into the tire to seal it.

What you need to go Tubeless

There are four primary items you need to go tubeless. They are a tubeless compatible rim, rim tape and valve, a tubeless-ready tire, and sealant. In many cases new bikes are coming stock with tubeless compatible rims (the largest expense) so check with your shop to see if you are already half way there.

What happens if you get a flat with a tubeless  tire

In the rare instance where you do get a flat tire, you can simply remove  the tubeless valve core, and install an innertube. There is a bit of added mess with the sealant, but otherwise changing a flat is simple.