Rider Type · Data-Derived
Diesel / Rouleur
Consistent across the ride. Aerobic engine that keeps firing late in the day.
Over 12 rides and 86 segment results in 2025, Stephan Dolezalek averaged in the top 67% of the field, with a +1 percentile points (improves!) from the opening segments to the late-ride segments.
Over 12 rides and 86 segment results in 2025, Stephan Dolezalek averaged in the top 67% of the field, with a +1 percentile points (improves!) from the opening segments to the late-ride segments.
Fatigue Pattern — Field Percentile by Segment Position
Average field percentile per segment slot (lower = better; bar height = how far back)
Opening (S01–S02): top 69% avg →
Late (S07+): top 68% avg ·
Swing: +1 percentile points (improves!)
Performance by Segment Type
By Distance
<0.4km (n=35 · 368W avg)
Top 69%
0.4–0.8km (n=31 · 333W avg)
Top 67%
>0.8km (n=20 · 300W avg)
Top 64%
By Gradient
<6% flat (n=18 · 353W avg)
Top 56%
6–10% mod (n=28 · 330W avg)
Top 68%
10–13% steep (n=32 · 344W avg)
Top 71%
>13% wall (n=8 · 323W avg)
Top 76%
Effort Profile
Punchy <0.45km ≥9% (n=27)
Top 75%
Threshold ≥0.7km ≥5% (n=19)
Top 68%
Peak Performances — Best 5 Segments
| Rank | Segment | Distance | Grade |
|---|---|---|---|
| 13/63 | Aric Lane | 0.23 km | 3.8% |
| 14/58 | Portola Valley LKHC #3 Hillbrook | 0.49 km | 10.1% |
| 19/72 | DeerCreekClimb | 0.32 km | 10.0% |
| 20/65 | Miranda Hill | 0.7 km | 3.8% |
| 20/64 | Deer Creek Sprint (Egan Official) | 0.5 km | 4.7% |
Toughest Moments — Worst 5 Segments
| Rank | Segment | Distance | Grade |
|---|---|---|---|
| 64/64 | Stonebrook to Prospect | 0.47 km | 5.5% |
| 72/74 | De Bell (Egan official) | 0.31 km | 7.9% |
| 64/67 | Quail Beotch | 0.24 km | 10.6% |
| 61/64 | Magdalena - Dawson to Stonebrook | 1.08 km | 5.0% |
| 84/89 | Madonna Way (the climb) | 0.29 km | 14.4% |
What the Data Suggests
💪
Strengths to Protect
Exceptional repeatability — the engine keeps firing deep into the ride. Late-ride performance (top 68%) is actually stronger to the opening. Thrives on rides with high segment counts where rivals are already fading. The aerobic base is the asset — protect it.
🎯
Development Area
Peak power and short-burst acceleration. The punch/threshold gap (top 75% vs top 68%) shows where the ceiling is on explosive efforts. Sprint intervals and over-under VO2max work would add a new gear without eroding the aerobic base. The diesel engine is built — adding a turbo is the next step.
📊
The Real Enemy
Absolute peak power output, not endurance. The engine runs clean all day but the rev ceiling is the constraint. Watts from early to late: 404W → 302W (-25%) — barely any drop, which is the signature. The rival who fades less than everyone else still loses to a rider who never needed to fade.