MTDKarting

Type	SLE	SLE	FZ	FZ	FZ	FZ	KZ	KZ	KZ
Size 5 in wheels	10x4.6	11x7.10	10X4.6	11X6.0	11X6.5	11X7.1	10X4.6	11X6.5	11X7.10
Hardness Shore A±5	58	58	50	50	50	50	46	46	46
L (mm) ±10	132	206	123	180	180	206	133	180	206
B (mm) ±10	108	150	105	132	139	150	105	139	150
C (mm) ±10	120	200	120	170	170	200	120	170	200
d (mm) ±10	126.2	126.2	126.2	126.2	126.2	126.2	126.2	126.2	126.2
D (mm) ±10	258	275	259	274	275	275	259	275	275
Air Pressure –psi Hot	12	12	12	12	12	12	11	11	11
Max Air Pressure psi	60	60	60	60	60	60	60	60	60
Max Speed mph	125	125	125	125	125	125	125	125	125

Air Pressure

1) For slippery or low grip tracks: Start with 11 to 13 psi cold before your track session. Immediately when you come in from the session measure the tire temperatures. They should be 13 -15 psi when the tire is hot. Adjust the pressure to get the hot values and you will be ready for the next session.

2) For sticky or high grip tracks: Start with 8 to 11 psi cold before your track session. Immediately when you come in from the session measure the tire temperatures. They should be 10-13 psi when the tire is hot. Adjust the pressure to get the hot values and you will be ready for the next session.

3) Weather changes will affect the behavior of the chassis and air pressure adjustments may be necessary to maintain the same chassis balance

4) A softer compound requires lower air pressure than harder compound

One or two psi can affect the handling of the kart. Therefore, it is important to have a good quality air gage

Surface Temperatures

A kart tire performs best when it is heated to around 176-203 F (80-95 C). Use a pyrometer to measure the temperature of the tires during a testing session. It is important to remember that the chassis set up or changing the driving style can help you to avoid overheating the tires and keeping them at their peak performance. Track conditions at each circuit also play a big role on the variation of tire temperatures.