2026 Polygon Siskiu T T7 vs 2025 Trek Fuel EX
The Trek Fuel EX size closest to your M is the ML. Compare the ML instead
What changes on the Trek Fuel EX
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- +36 mm
- Longer: steadier at speed
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- +10 mm
- Longer: more planted
The two frames
Only the Polygon Siskiu T T7 is drawn. The Trek Fuel EX numbers we have for size L are missing the reach, stack and seat angle.
Geometry side by side
| Measurement | Polygon Siskiu T T7 M | Trek Fuel EX L | Difference |
|---|---|---|---|
| Reach | 465mm | not listed | |
| Stack | 609mm | not listed | |
| Head tube angle | 64.5 | 64.5 | ±0.0° |
| Seat tube angle | 71.2 | not listed | |
| Effective top tube | 595mm | 626.9 | +32 mm |
| Chainstay length | 430mm | 440 | +10 mm |
| Wheelbase | 1214mm | 1250.2 | +36 mm |
| BB height | 337.5mm | 335 | −3 mm |
| Standover | 705mm | 747.8 | +43 mm |
| Seat tube length | 400mm | 435 | +35 mm |
| Head tube length | 95mm | 105 | +10 mm |
| BB drop | not listed | 38 |
Differences are the Trek Fuel EX minus the Polygon Siskiu T T7. Full charts: 2026 Polygon Siskiu T T7, 2025 Trek Fuel EX.
Where each sits in its class
Polygon Siskiu T T7Trek Fuel EX
AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted
Each bike is ranked against the other trail bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Polygon Siskiu T T7T7 | Trek Fuel EX5 |
|---|---|---|
| Frame | Polygon ALX | Trek Fuel EX |
| Fork | RockShox Recon Silver TK | RockShox Recon Silver |
| Rear shock | RockShox Deluxe Ultimate | X-Fusion Pro 2 |
| Shifter | Shimano Deore M6100 | Shimano Deore M6100 |
| Derailleur | Shimano Deore M6100 | Shimano Deore M6100 |
| Cassette | Shimano Deore M6100 | Shimano Deore M6100 |
| Chain | KMC X-12 | Shimano Deore M6100 |
| Crankset | Shimano Deore M6120 | Shimano MT512 |
| Chainring | Shimano Deore M6120 | not listed |
| Pedals | Flat Pedal | not listed |
| Wheelset | Polygon MT6 | Bontrager Line TLR 30 |
| Tire | Maxxis Dissector | Bontrager Gunnison Elite XR |
| Brake | Shimano MT420 | Shimano MT200 |
| Rotor | Shimano SM-RT54 | Shimano SM-RT56 |
| Handlebar | Polygon EXPERT | TranzX JD-YSI-22PLQ |
| Stem | Polygon EXPERT | Bontrager Comp |
| Headset | FSA No 57E | not listed |
| Seatpost | X-Fusion MANIC LC | not listed |
| Saddle | Linc XTENT | Bontrager Arvada |
| Bottom bracket | not listed | Shimano MT501 |
| Grips | not listed | Bontrager XR Trail |
| Dropper post | not listed | TranzX JD-YSI-22PLQ |
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