TPU bicycle inner tubes
Advanced Engineering. Superior Performance. Global Reliability.
Blum designs and manufactures precision bicycle inner tubes for road, gravel and mountain-bike riders who demand consistent pressure retention and zero-leakage sealing on every ride. Every Blum tube is built around a Presta valve machined to micron-level tolerances, with stem-length options of 42 mm, 60 mm and 80 mm so the same range fits shallow alloy training wheels, mid-profile all-rounders and deep-section carbon race wheels.
The Blum complete inner-tube catalogue covers 700C tubes for road and gravel widths from 25 mm up to 52 mm, plus 650B options for wider gravel and bikepacking setups and dedicated MTB tubes for 27.5" and 29" wheels. A reinforced-wall variant is offered on the road range for riders who run high pressure, race on rough surfaces or face sharp debris during long endurance routes.
Installation, maintenance and after-sales
Detailed installation and maintenance instructions explain how to seat the tube inside the tyre, inflate to the correct pressure for the wheel and rider weight, inspect the rim tape and valve hole, and store unused tubes in a way that maximises shelf life. Following the recommended steps reduces the most common causes of pinch flats, slow leaks and valve-stem damage, and keeps the warranty intact.
Blum is produced by Rusty S.r.l., a manufacturer based in Acquaviva, San Marino, and complies with EU General Product Safety Regulation (GPSR, 2023/988) and the EU REACH Regulation (1907/2006). Bike shops, distributors and OEM customers can request quotes and product datasheets directly through the contact form. For data-handling and consent questions, consult the privacy notice and the cookie information page.