Remo Racing – Kosmic Owner’s Knowledge Packet –
www.kosmickartaustralia.com
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P a g e
8. Tyre Pressures
Due to the many specifications and compounds of kart tyres in Australia today, we suggest you seek
information from your kart dealer or particular tyre distributor.
General rule:
The higher the tyre pressure is started out at, the quicker the tyre will reach its optimum pressure.
This will also cause the tyre to have a decreased window of effectiveness. Therefore, in longer races
it is better to start off at a lower pressure giving the tyre a longer window of optimum operating time.
9. Axle Chart and the effectiveness
Axles are very much talked about regarding tuning a Kart and rightfully so. OTK produces six (6)
axles for the 100cc category and five (5) for the 125cc gearbox category. OTK Type ‘N’ is the
standard axle and medium stiffness for the entire range. This axle is also what each chassis comes
standard with from the factory.
Which is the best axle to use when?
Generally the consensus is that a softer axle (Type U) will free
the chassis letting it operate more freely around the track. This may be true in some instances but
typically not with the OTK material. Typically it is recommended to use a harder axle (Type H or
HH) when the grip levels increase.
Softer axles are recommended more for use when the grip levels are low. Why is this true? This
holds true mainly due to the fact the chassis are made of soft 30mm tubular steel. With a soft chassis
and a softer axle you will essential create the tyre to work more creating “Side Bite” or the sidewall
of the tyre to rollover. This will cause the chassis to ‘Hop’ and therefore lose its effectiveness
throughout the race. Keep with the ‘N’ axle; we use this axle 80% of the time and as the grip level
increase the ‘H’ will work for your needs.
Remember that the axle doesn’t simply work outside the chassis, it also creates balance between the
frame rails, and therefore, increased stiffness on your axle selection will give the chassis more
balance as well.
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SEE AXLE CHARTS PROVIDED ON NEXT PAGE
