Rider Type · Data-Derived
Sprinter
High-end power on flat or rolling terrain. Speed over gradient.
Over 10 rides and 87 segment results in 2025, Stan Lau averaged in the top 91% of the field, with a +4 percentile points (improves!) from the opening segments to the late-ride segments.
Over 10 rides and 87 segment results in 2025, Stan Lau averaged in the top 91% of the field, with a +4 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 92% avg →
Late (S07+): top 89% avg ·
Swing: +4 percentile points (improves!)
Performance by Segment Type
By Distance
<0.4km (n=40)
Top 90%
0.4–0.8km (n=28)
Top 93%
>0.8km (n=19)
Top 92%
By Gradient
<6% flat (n=12)
Top 89%
6–10% mod (n=40)
Top 91%
10–13% steep (n=31)
Top 92%
>13% wall (n=3)
Top 88%
Effort Profile
Punchy <0.45km ≥9% (n=28)
Top 90%
Threshold ≥0.7km ≥5% (n=20)
Top 92%
Peak Performances — Best 5 Segments
| Rank | Segment | Distance | Grade |
|---|---|---|---|
| 41/60 | Deerfield Drive up | 0.24 km | 9.1% |
| 44/61 | Arastradero Steep Sprint | 0.52 km | 5.6% |
| 63/85 | Boronda View Sprint | 0.6 km | 4.4% |
| 40/54 | Summerhill / Rockpoint | 0.36 km | 8.4% |
| 45/58 | Altamont [WB] - Natoma to Almaden Court | 0.39 km | 5.4% |
Toughest Moments — Worst 5 Segments
| Rank | Segment | Distance | Grade |
|---|---|---|---|
| 69/69 | Deerfield Drive up | 0.24 km | 9.1% |
| 69/69 | Viscaino Rd (East Side) | 0.6 km | 10.8% |
| 55/55 | Liddicoat + Stanford | 0.4 km | 10.0% |
| 57/57 | Portola Valley LKHC #3 Hillbrook | 0.49 km | 10.1% |
| 54/54 | West Loyola, Eastbrook to Rolly | 1.04 km | 7.5% |
What the Data Suggests
💪
Strengths to Protect
High-end speed on flat and rolling terrain. Short explosive efforts when the gradient stays low — that's the ceiling. Top 92% when fresh on opening segments. Fast-twitch recruitment is the edge — don't grind it away with long endurance blocks.
🎯
Development Area
Sustained climbing — the 3-point gap between flat (top 89%) and steep (top 92%) performance is the main story. Threshold climbing work (sweet-spot on 6–10% gradients) would open up more of the Egan route catalog. Target rides with longer sustained pitches to build climbing-specific endurance.
📊
The Real Enemy
Gradient. Once the road tips up beyond 8%, the advantage erodes fast. Egan routes are climb-heavy, so working on climbing-specific power is the highest-leverage investment.