2 in stock
12″ Tyre Set 100/90R12, 120/80R12
The Medium‑Compound Edge: Balanced Grip Meets Durability
Dominate the dry track with confidence. The K00 Medium gives you the ideal middle ground — blistering grip out of corners, strong mid‑corner traction, and extended life to last more heat cycles. When Super Soft wears too fast and Hard lacks bite, the Medium puts your lap times in the sweet spot.
Balanced Performance – Enough stick for aggressive lean and hard braking, yet more durable than softer compounds.
Predictable Feedback – Stable under heat, giving consistent feel lap after lap.
Versatile Use – Works well across a range of track temperatures and surfaces. Perfect for sprint races and endurance segments alike.
Race‑Proven Engineering – Same zero‑tread slick core, radial steel belt, and carcass design found in other K00 compounds. Optimised for grip, temperature control, and feedback.
Strong grip without frequent tyre changes
Consistency over whole sessions
A go‑to compound when conditions are neither cold nor blistering hot
⚠️ Track Use Only — Built for dry circuits. Not for wet or road conditions.
| Parameter | Typical / Recommended Value |
|---|---|
| Type / Use | Full slick, track use only (dry circuit) |
| Compound | Medium hardness “Medium” (balanced grip / durability) |
| Size | 100 / 90 R12 (pitbike / miniGP front size) |
| Hot Pressure (Reference) | Front: ~ 1.5 bar when hot (for Soft variant) |
| Rear Pressure (Reference) | ~ 1.3 bar hot (Soft variant) |
| Operating / Target Temperature | ~ 90 °C tyre surface target temp |
| Weight | ~ 3.68 kg (as listed for Medium / Soft variant) |
Because published data is more common for the Soft variant, you should treat these as starting points and adjust based on real‑world trials:
Front (100/90 R12 Medium): Start hot pressure ~ 1.5 bar
Rear (if using 100/90 R12 as rear; or corresponding rear size): ~ 1.3 bar hot
Use tyre warmers to bring the tyre close to race temperature before first laps
Monitor hot pressures and adjust ±0.1 bar depending on grip, wear pattern, and track temp
The target tyre surface temperature is ~ 90 °C for optimal grip
| Parameter | Typical / Recommendation |
|---|---|
| Type / Use | Full slick, track use only (dry circuit) |
| Compound | Medium (balanced between grip and durability) |
| Size | 120 / 80 R12 |
| Hot Pressure (Baseline Estimate) | ~ 1.3 to 1.5 bar (≈ 18.8 to 21.8 psi) — start in this range and adjust |
| Target Tyre Surface Temperature | ~ 85‑95 °C (often ~ 90 °C in pitbike / miniGP sleeve data) |
| Cold Pressure (Before Hot Use) | ~ 0.25 to 0.35 bar lower than hot target (e.g. 1.0‑1.2 bar) |
| Warmers Use | Strongly recommended to bring tyre up to working temp before first laps |
| Adjustment Guidance | – If edges overheat / tear: reduce pressure by ~0.1 bar – If centre overheats or tyre feels “sloppy”: increase pressure – If grip drops mid‑session: check for thermal degradation and compound limits |
| Notes from Available Soft / Supersoft Specs | For the 120/80 R12 in Soft / Supersoft variants, sellers list hot front pressure ~ 1.5 bar, rear ~ 1.3 bar**. |
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