TOST 400X4 Tube
TOST has a great selection of aircraft tires from 3″ to 10″ available from stock.
Being an authorized Michelin Distributor TOST can supply all Michelin brands: Condor, Michelin Aviator and Michelin AIR.
For more than 30 years now TOST has manufactured aircraft tires exclusively under the brand TOST–AERO in the dimensions: 200x50, 260x85, 4.00–4 and 336x115–5. Characteristics are: long lifetime, very robust, for high load and speed.
INNER TUBE TOST 4.00 – 4 bent 90° 32G valve standard length 32mm. Also available with valve length 38mm Multipurpose tube 400x4, 3.00–4, and 260x85.
History of TOST
TOST has more than 60 years of experience in the development and manufacturing of aviation safety equipment. It's a family business – run in the fourth generation – they stick to the motto: Conserving the well-proven system – Developing forward.
The cornerstones of their corporate policy are:
Customer satisfaction is their highest goal. The customer is the king – he should like to come back – and not like to send the product back.
Since 1969 TOST holds a LBA approval as Design and Production Organization. (LBA= German Aviation Authorities). In the meantime, all approvals are issued by the EASA. In yearly audits through the aviation authorities, the compliance with quality standards is checked and kept record of. Over and above those official regulations, they live the quality thought in their every–day work.
Modern manufacturing techniques, economical resource management and the long lifetime of TOST products are their contribution to the protection of the environment. Gliding is an ecologically friendly sport.
Long standing relations to their customers, suppliers and employees stand for the continuity in their company.
TOST Notes on Inner Tubes
Aircraft tubes are made from natural rubber and they are slightly underdimensioned so that it is easier to install them in a new tire. The layers of an aircraft tire are made of nylon – they therefore tend to become larger with use.
The inner tube also increases in size, adapting to the larger inside diameter of the tire. If a tube enlarged in this way is later fitted in a new tire, it can happen that it is too big for the inside of the tire, with the result that the tube may crease. These creases may rub through during operation, causing the tube to loose pressure. Rubbing through slowly results in slow pressure loss – the pilot is thus warned before a dangerous situation arises. If the tube tears during a start, the pilot will fail to notice that he is flying with a flat tire.
Taking into consideration all the risks involved with fitting an old tube into a new tire, it is advisable always to fit new inner tubes in new tires.