When did you last check how much tubeless tire sealant is inside your mountain bike’s tubeless tires? Six months ago? Longer?
See, the mountain bike tubeless tire system is great, but there are some shortfalls. Because the sealant solution works by sealing punctures from the inside of your tire, you won’t actually know how much tubeless tire sealant is being used up or even drying up.
In addition, temperature, tubeless sealant quality, tire quality, how much sealant is absorbed by the tire, and any slow leaks in your valves, wheelsets or tubeless conversion kit can also affect how much sealant has been used up or dried up inside your tire.
So, perform the check before your next race. The few minutes spent could mean you’ll ride the whole race, instead of walk to the finish with a flat tire because you didn’t know you had low or no sealant.
How to Check Your Tubeless Tire Sealant Levels
- Make sure you have enough new tubeless tire sealant on hand for both tires.
- Turn each wheel so the valve is at the top, then release all air pressure from the tire using the valve.
- Using a tire lever or two, un-seat a small section of bead on each tire.
- Have a look and see how much tubeless tire sealant is left in the bottom of each tire. If there’s not enough, top it up.
- Perform this simple check (2-minute How-to video) every 2 to 3 months and before each mountain bike race.
Stan’s NoTubes Tubeless Tire Sealant recommended quantities:
- small tires of 1.0 to 1.8 inch width – use 2/3 scoop per tire (1 scoop equals 63 cubic centimetres)
- 1.9 to 2.0 sized tire – use 1 to 1 1/2 scoops (2 oz or 60 grams) per tire
- larger tires and downhill tires – use 2 scoops per tire
Important Signs that your Tubeless Tire Sealant could be getting Low:
- You have to pump up your tubeless tires a few psi before each ride
- There is sealant leaking at the bead (between the tire and the rim) or from other sections of the tire
- Some sealant sprayed out of your tire during a ride, or there is sealant solution spray on your bike
Where to next:
Mountain Bike Racing Tips – 14 The Big Picture View
Mountain Bike Racing Tips – 16 Know Thy Course
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