P at every track

P pace at every track

Lap times across years say as much about the weather as the class. % of the field is each class's best lap as a share of the field's on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks), so the conditions drop out: 100% is level, less is quicker, and a move in it is the class getting faster or slower against the field.

Closest to the field: P 77.3% of the field Bart Wolf, Road America Runoffs 2025 race

% of the fieldLap times

Psolid race · dashed qualifying · slower is lower

Psolid race · dashed qualifying · each class's best lap as a share of the field's at the same event (the field index, changeable above); 100% is level, less is quicker, so up the chart is quicker

	Event	P
	Event	Qual best	Race best	Trap	% of the field
	Road America Runoffs 20262026-09-28	2:02.281Perry Richardson · fastest of 10 · top 5 within 1.3s+1.101s (+0.91%)	2:03.283Lawrence Loshak · fastest of 10 · top 5 within 0.8s+1.161s (+0.95%)	165.6Jason Miller+0.7 mph (+0.4%)	78.4%qual 77.9%
1 rule change (P: 1)1 suspension & brakesshowhide 2026-01-01 Request to Continue to Allow Carbon Brakes #39476suspension & brakes
	Road America Runoffs 20252025-09-29	2:01.180Lee Alexander · fastest of 14 · top 5 within 1.5s	2:02.122Bart Wolf · fastest of 13 · top 5 within 2.1s	165.0Jason Miller	77.3%qual 77.3%
7 earlier rule changes on record, in force before Runoffs 2025 (from 2025)2 induction · 2 weight · 1 engine · 1 tyres & wheels · 1 othershowhide 2025-09-01 13B Rotary Engine Rules Change Request #38856induction 2025-09-01 Add Radical Cup series Radical SR3 spec line to Table 1 #38916other 2025-09-01 Clarify spec line cars language #38943weight 2025-08-01 RM 25-05 - Prototype Engine Table A, 2 Cycle Restrictor Change #38929induction 2025-05-01 Add missing punctuation marks #38150weight 2025-02-01 Correct text in engine table notes #37606engine 2025-02-01 Update Prototype class designation #37653tyres & wheels

By track

Track	Events	Typical % of the field	Best	Latest
Road America	2	77.3%	77.3%Runoffs 2025	78.4%Runoffs 2026

About this data

Every event the class ran, at any track, oldest to newest on the chart and newest first in the table. Each point is the class's best lap as a share of the field's best on the same day (every class that ran that day but the ones shown, each scaled by its usual pace against SM and averaged, with each shown class's own track character taken out, so one figure reads the same across years and tracks): the weather and the day cancel out, so one figure compares across years where lap times cannot, and across tracks too, since the class's own character at each track is taken out. A track with only one or two events on record is corrected less, since there is less to go on. A best from fewer than three cars is greyed. The rule changes that took effect between two events are folded between their rows.