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Onza Tires has released a tubeless tire sealant to complement its range of mountain bike tires. Its unique made-in-Europe formulation leans on microfibers to seal holes up to 6mm wide. Onza’s press release claims it keeps its consistency and never dries out inside the tire, so topping up should only be necessary if you burp the tire, or suffer a big leakage from a hole that is, presumably, larger than 6mm across.
Onza Tubeless Sealant
We challenged Onza on their claim that their new Tubeless Sealant “never dries up”. They commented that they are confident their sealant will last the lifespan of a tire; for them, that’s over 8 months of riding through temperatures from a -5°C to 37°C. The Onza Tubeless Sealant is a water-based formula (completely ammonia free), so if it does ever dry up, they say you can simply top it up with water to re-suspend its hole-plugging synthetic latex and microfibers.
The workable temperature range for the sealant is as low as -20°C and a s high as 50°C (or -4°F to 122°F). Onza say the formulation works well at high pressures, so should work fine for road tires as well as gravel and mountain bike tires.
Recommended quantities are as follows:
- Road/Gravel – 30-50 ml | 1-2 oz
- 26″ MTB – 60-80 ml | 2-2.7 oz
- 27.5″ MTB – 80-100 ml | 2.7-3.4 oz
- 29″ MTB – 100-120 ml | 3.4-4 oz
Pricing & Availability
Onza Tubeless Sealant is available in 250 ml and 1000ml bottles, retailing at €16.99 ($18.99 USD) and €33.99 ($37.99 USD), respectively.
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