• Toyo RA-1 tires have proven themselves to be the most consistently performing tire over it’s life span, more than any other performance tire
    in the world.
  • TOYO RA-1 tires are unique in the high performance industry in that they do not require a “heat cycle” process to increase the life of the tire.
  • However, it is known that TOYO RA-1 tires can become “greasy” during the first 2-3 heat cycles.
    • Once this “break-in” period has passed, the TOYO RA-1 tire will post consistently quick lap times for the remaining life of the tire at each and every event.
    • Therefore, it is recommended that you allow the TOYO RA-1 tires 2, 3, or 4 heat cycles before expecting you best (quickest) lap times.
  • PRESSURES:
    • We’ve found that the TOYO RA-1 tire performs best with a “hot pressure” of between 38-42 lbs.
      • Ideally, you should set the “starting pressure” at approximately 30-32 lbs
      • A “starting pressure” is not a “cold pressure”, but the pressure that you should set the tires to prior to entering the track for practice or a race.  At any time of day or night.
        • Depending upon the driver’s style of driving, the type of car, the vehicle’s rim width and the tire size, the type of track and/or the chassis settings, these starting pressures can vary by 4-5 lbs lower or higher.
        • In cold weather, it is recommended that the starting pressure be between 27 and 29 lbs with an ending or “hot” pressure of between 35 and 38 lbs.
        • Starting with too LOW a tire pressure will cause the tire to become overheated during the later stages of the event. The result is that the tire will “go off” or begin to loose traction. Extremely low tire pressure (below 20 lbs) could cause sidewall damage.
  • TREAD DEPTH:
    • At full tread-depth, the inner two grooves of the TOYO RA-1 tires are 8/32nds of an inch deep, and the outer 2 are 6/32nds of an inch deep.
      • At full tread-depth the TOYO RA-1 is famous for it’s performance in the rain.
        • Rain pressures should be about 5 lbs lower than the “dry” starting pressure
      • At full tread-depth the TOYO RA-1 is an awesome performing street tire.
    • Shaving the tire eliminates what is called “tread squirm” and allows the tire to react quicker to driver input and vehicle directional changes.
  • DIRECTION AND ROTATION:
    • The tire rotation directions indicated on the sidewall of the tire are important for water drainage in rain or wet conditions.
    • However, the direction of rotation can be changed to suit the driver’s needs once the tire has been shaved and/or worn down. Thus, you may use the tire in any direction of rotation when not in rain or wet conditions.
  • TIRE DAMAGE:
    • The most common tire damage is when the tire/wheel combination strikes the edge of a pot hole, a curb at the side of the track, or the edge of the pavement. If the driver should drop a wheel over the edge of the track and the track’s edge is higher than that of the pavement, the sudden sharp impact could cause the bead area of the tire to become broken. Should this happen, a bubble will appear on the sidewall of the tire. CHANGE THIS TIRE IMMEDIATELY.