Rider Type · Data-Derived
All-Rounder
No obvious weakness. Adapts to gradient and distance without big performance swings.
Over 10 rides and 91 segment results in 2026, Jacob Donenfeld averaged in the top 45% of the field, with a +18 percentile points (improves!) from the opening segments to the late-ride segments.
Over 10 rides and 91 segment results in 2026, Jacob Donenfeld averaged in the top 45% of the field, with a +18 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 54% avg →
Late (S07+): top 35% avg ·
Swing: +18 percentile points (improves!)
Performance by Segment Type
By Distance
<0.4km (n=33 · 359W avg)
Top 48%
0.4–0.8km (n=37 · 307W avg)
Top 46%
>0.8km (n=21 · 263W avg)
Top 41%
By Gradient
<6% flat (n=22 · 327W avg)
Top 47%
6–10% mod (n=34 · 309W avg)
Top 45%
10–13% steep (n=24 · 318W avg)
Top 45%
>13% wall (n=11 · 309W avg)
Top 45%
Effort Profile
Punchy <0.45km ≥9% (n=22)
Top 47%
Threshold ≥0.7km ≥5% (n=23)
Top 44%
Peak Performances — Best 5 Segments
| Rank | Segment | Distance | Grade |
|---|---|---|---|
| 4/54 | Sarahills Dr. (East) | 0.62 km | 9.6% |
| 8/62 | Hillview | 0.61 km | 0.1% |
| 12/62 | Foothills Park Vista Point (Egan Official) | 0.96 km | 7.6% |
| 11/56 | Villa Dr / Fairway to Country Club | 0.37 km | 5.0% |
| 12/55 | Up Escobar to Westridge | 0.96 km | 4.6% |
Toughest Moments — Worst 5 Segments
| Rank | Segment | Distance | Grade |
|---|---|---|---|
| 72/75 | Golden Oak from Bear Gulch to Peak Ln | 0.77 km | 6.3% |
| 70/77 | Altamont: Corbetta to Crest (Egan Official) | 0.99 km | 8.1% |
| 45/55 | Aric Lane | 0.23 km | 3.8% |
| 48/59 | Quinhill from University (Egan Official) | 0.31 km | 12.0% |
| 47/58 | Oakridge Drive inbound | 0.22 km | 5.7% |
What the Data Suggests
💪
Strengths to Protect
Remarkable consistency — no single segment type is a weakness. Top 35% late in rides vs top 54% early — you warm into efforts rather than fade. That adaptability is rare: most riders have a clear Achilles heel that good routes can exploit. Best gradient: wall-steep (>13%) at top 45%.
🎯
Development Area
Sharpening the best segments into consistent top-10 finishes. Currently 2% top-10 rate — the consistency is there, the peak isn't yet. High-intensity work (VO2max, 30/30s) would push best efforts into the front group.
📊
The Real Enemy
Absolute power, not profile. The data shows no meaningful fatigue (338W early, 311W late). The consistency is the foundation. The gap to the front isn't about endurance or the wrong segment type — it's about the power number itself. That's the most direct lever.
Pack Battle — Rivals Within 15 Seconds
Same-gender riders finishing within 15 s of Jacob across multiple rides (≥2 encounters).
🏴
Nemesis
Brian Tam
0–2 in 2 encounters · 0% wins
🎯
Prey
Robert Ragno
2–1 in 3 encounters · 67% wins
| Rider | Encounters | Jacob record | Win % |
|---|---|---|---|
| 🎯 Robert Ragno | 3 | 2–1 | 67% |
| 🏴 Brian Tam | 2 | 0–2 | 0% |
| 🏴 Allen I | 2 | 0–2 | 0% |