Apex PSI

Baseline compound ranges and adjustments were built from:
· MG Tires – Tips
· Nashville Karting Group – MG tyre pressure guide
· TKART – the Vega method for kart tyre pressure
· Vega USA – XM4 & XH4 compound specs
· Flow Racers – go-kart tyre pressure reference
· KartletiX – setting tyre pressures
· Dunlop Kartsport Australia
· Karting Australia – LeCont LH03 AUS dry tyre spec (2022–2026)
· Patrizicorse – Karting Australia 2022–2026 LeCont competition tyre FAQ
· KartSportNews – KA 2025 rule book (Maxxis Sport / 4SS, LeCont / Rotax)
· DWT Racing – M-Series LV magnesium wheel
· Karting Queensland – affiliated clubs & track specs
· KartSportNews – Cooloola Coast rebuild report
· KartClass – QLD outdoor track lengths & turn counts
· CRG Factory Race Team / SSC Racing – chassis & tyre setup manual

Bridgestone YDS and the OTK/CRG wheel entries have very little published pressure data, so they're treated as close to the generic baseline — a rougher starting point than the others until you log your own numbers against them.

On left/right split — what's a rule of thumb vs what's real: cornering weight transfers onto the outside tyres, so a track with more right-hand corners loads and heats the left-side tyres harder (and vice versa) — that side gets set 0.15 psi lower cold as a starting-point heuristic. But there is no published, authoritative left/right psi number — the CRG factory manual's own method isn't a formula either: run equal pressures as a baseline, then after a session record each corner's actual hot reading and nudge that corner's own cold fill until all four rise a consistent ~2 psi. That's exactly what the Measured pressures grid in the Session Log is for.

Your own data beats all of this: your sync code (top of the page) carries your session log and remembered track settings to any device you open the same code on. Tap "Remember grip & direction for this track" once you know a track, and log your measured pressures every session — that becomes more accurate than any generic source here.