4,00-8 SR-421 (tire Shinko)

Specifications:

Designation + Profile Shinko 4.00- 8 55J TT SR-421 G. Boy OR

Front and back positions

Load/speed 55/J

On the road

Measuring rim 2.50x8

Permissible rim width 2.15-3.50x8

Use and maintenance

Store tires clean and away from sources of heat, light, ozone or hydrocarbons. Avoid prolonged exposure of tires to direct sunlight. Avoid any contact with grease, gasoline, volatile solvents or other agents that can damage the rubber. Avoid horizontal storage of tubeless tires, only small tires can be stored horizontally (max. 6 months). If the tires are stored horizontally, they must be placed tooth against the tooth. If the tires are stored mounted on the rim, reduce the inflation pressure. Make sure that there is no water or moisture inside the tire. Never store tires in direct contact with the ground for long periods of time. For safety reasons, tires can only be repaired by professionals using the correct methods and tools. When loading a tire, it is necessary to take into account the relationship between speed, inflation pressure and the load capacity of the tire. (see also the online pressure calculator on our website) Overloading causes premature tire destruction. Use the technical documentation and inflation tables that define the load and inflation for different operating speeds. Underinflation not only causes the tire to run incorrectly, but also the separation of the pads, or other damage to the tire pads. Overinflation increases tire hardness and reduces impact resistance, leading to damage to the tire liners.

Assembly and disassembly instructions

Tire mounting and dismounting can be dangerous and should only be performed by trained and qualified personnel using the correct tools and work procedures. Failure to properly follow these procedures may result in misfitting the tire on the rim, resulting in the destruction of the tire with explosive force that could result in serious injury or death. Make sure the rim, tire and tube are compatible. Check that the tire is suitable for the equipment/machine. Only use rims recommended or approved by the tire manufacturer. Always use only the correct special equipment and tools. The rim must be clean and in perfect condition (not damaged, etc.), if necessary, clean the rim with sandpaper. Do not under any circumstances install tires on rims with cracks, severe deformation, bearing traces of welding repairs, etc. Carefully inspect the inside and also the outside of the tire to identify any damage. If the extent of the damage does not allow for repair, the tire should be scrapped. When fitting with a tube, always use the correct new tube and insert for the given size. To mount tubeless tires on tubeless rims, always use a new tubeless valve. Lubricate the rim and tire beads before mounting. Use only a suitable lubricant that will not destroy the tire (never use silicone or gasoline-based lubricants). We recommend vertical mounting. In the case of horizontal mounting, it is necessary to check whether the lower foot fits correctly. Place the casing on the rim opposite the opening for the valve (respect the direction of rotation indicated by the arrows). Using the mounting lever, gradually slip the first bead over the edge of the rim. Subsequently, insert a slightly inflated tube, sufficiently treated with a slide (if it is mounted), into the shell. Position the valve and lightly secure it with the circlip. Put on the second foot, proceed step by step so that you end up at the valve. To properly fit and center the casing, remove the inner insert of the valve. Inflate slowly and check the correct seating of the tire bead. Make sure that the foot of the tire does not pinch the inner tube. Keep a safe distance during inflation, always use a safety cage, if possible attached to the wall or with a safety chain. During the pressure reading, make sure that no part of your body is in the possible trajectory of the internal parts of the valves or their caps. It is recommended to use a suitable device to limit the inflating pressure. Use a compressed air filter and dehumidifier as necessary to remove moisture and dust. If the shoes are not seated properly, bleed air, re-lubricate and inflate. Repeat this operation until the feet fit correctly. If all previous operations have been carried out correctly, fit the inner valve insert. Inflate the tire according to the load. Make sure that the valve does not touch the rim, brake drums and other mechanical parts. Removal Never try to remove the beads of an inflated tire. Always remove the inner valve insert. Never use tools that can damage the rim or tire beads.