Airtight and durable for longer service without refills - High-density temperature-resistant butyl rubber provides airtightness for up to 180 days without refilling. Advanced vulcanisation prevents micropores and cracking even under high friction on e-bike tyres, with UV and ageing resistance for long-term performance. Precise 14 inch fit for e-bikes and motorcycles - Fits 14 inch tyres with a width range of 2.125 to 3.0 inches. Optimised for electric bicycles and motorcycles, featuring a curved metal valve for easy air pump access. - Clear profile lines on the inside reduce slip and improve adhesion between the tube and tyre sheath. The elastic structure flexibly adapts to different tyre widths. Non-slip surface for comfort and reliability - Textured outer surface increases friction resistance and helps absorb shocks from uneven road surfaces. - Reinforced side walls minimise breakdown risks from sharp edges or stones. - Cushioned feel combined with lightweight design (320 g) enhances riding dynamics. Easy installation with light, flexible design - Flexible material allows quick tube insertion into the tyre without special tools and simple connection to the curved metal valve. - Thin-walled construction reduces total weight by 15% compared with standard models while preserving durability. Practical use scenarios - Daily urban commuting on 14" e-bikes or motorcycles with 2.125–3.0" tyres, where long air retention and reliability matter. - Rides on mixed or rough surfaces (potholes, gravel) where extra grip, cushioning, and side-wall protection are beneficial. - Spare or replacement tube for e-bike/motorcycle fleets requiring durable, easy-installation components with low maintenance.