TOST-AERO 400X4 Tire
TOST has a great selection of aircraft tires from 3 inch to 10 inch available from stock.
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.
TOST 400X4 tire is a main landing gear tire used on several sailplane designs as standard equipment including heavy gliders designed for use with water ballast.
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 Tire Exchange
• Jack up aircraft at specified point.
• Deflate tire completely before removing wheel unit.
• Do not unscrew the valve insert until the tire pressure has dropped to 0.2 bar.
• Remove wheel from axle.
• Loosen wheel bead from the hub shoulder with a rubber or plastic hammer.
• Undo wheel bolts (with 5 mm hexagon key), remove bolts and washers, split hub halves.
• Tires and wheel hubs must be clean and dry.
• Do not apply excessive force when replacing a wheel.
• Apply adhesive agent (or talcum powder) to the hub shoulder.
• Remove dirt, sand, labels, etc. from the tire. Apply a moderate amount of talcum powder to reduce friction between tube and tire.
Caution: Too much talcum has the opposite effect.
• Fill air into tube (placed in the tire) until it is evenly round. Remove nut and washer from valve.
• Place tire (red mark at valve hole) and tube on the wheel half with the valve hole, push valve through valve hole.
• Push other wheel half onto tire, match bolt holes with centering shaft.
• Insert wheel bolts, washers and any nuts, and tighten to the correct torque (M6: 9 to 10 Nm). Tighten bolts diagonally.
• Place a tire in a safety cage, when inflating it to mounting pressure for the first time. If you do not have a safety cage, take great care when inflating the tire. Inflate the tire to mounting pressure. The mounting pressure is 10% more than the specified operating pressure. Check carefully for leaks. Leave to adjust at this pressure for 12 to 24 hours. Once the tire shows no leaks and is at operating pressure, the wheel unit can be mounted on the aircraft.
• Make sure that the wheel unit is mounted perfectly balanced to avoid vibration and excessive wear.
• Larger aircraft tires are marked with a red dot. This is an indication of the lightest spot of the tire. The valve must be placed at this point to eliminate or minimize a balance/vibration problem of the tire.