Hookless | Straight-side
Zipp 303 XPLR S
32mm internal
40mm external
approved tyres only
Measured tyre: 43.6mm
bead retention depends on tyre approval + pressure

The hookless model expands tyre width into measured casing width and applies a size-specific maximum pressure. Wider casing volume lowers recommended pressure. Excess pressure produces bead unseat risk.

Hooked | Crotchet Tubeless
DT Swiss GRC 1100
24mm internal
36.5mm external
mechanical hook
Measured tyre: 40.8mm
burping | pinch-flat risks dominate at low pressure

The hooked model retains the bead mechanically and uses a rounder casing estimate. At very low pressures the dominant modelled risks shift toward burping, rim strike and pinch-flat.

Recommended pressure curve
Front | rear split from system weight and measured tyre width
Front: 34 psi
Rear: 37 psi
Zipp max: 51 psi
front recommended pressurerear recommended pressure20 psi60 psihookless limitPressure curve within hookless limit

This model estimates pressure from system weight, tyre casing width and surface roughness. Rear pressure is higher because the rear wheel carries more static rider+bike load.

Real tyre data overlay
Labelled size vs modelled measured width
Zipp 32mm internal
DT Swiss 24mm internal
Tyre model35404550

The overlay is intentionally editable/transparent. Measured bench data can replace the current reference estimates.

Failure mode visualization
Dominant risk by rim interface and pressure state
current state: stable
Hookless
Bead unseat
Dominates when pressure exceeds the wheel/tyre limit or the tyre is outside approved compatibility.
Tubeless
Burping
Dominates when pressure is very low, lateral load is high or casing support is insufficient.
Impact
Pinch-flat | rim strike
Dominates when pressure is low relative to system weight and impact load.
Zipp measured
43.6
mm casing
DT Swiss measured
40.8
mm casing
Front rec.
34
psi
Rear rec.
37
psi
Hookless limit
51
psi max
Risk
low
within curve