2026 Polygon Siskiu T T8 UDH vs 2026 Transition Smuggler Carbon XO
The Transition Smuggler Carbon XO size closest to your M is the M. Compare the M instead
What changes on the Transition Smuggler Carbon XO
Compared with the Polygon Siskiu T T8 UDH in M, the Transition Smuggler Carbon XO in L places the top of the head tube 16 mm higher and 20 mm further forward, relative to the bottom bracket. Its wheelbase is 33 mm longer, which can contribute to stability at speed.
- Frame stack
- +16 mm
- Higher front end
- Frame reach
- +20 mm
- Longer frame reach
- Wheelbase
- +33 mm
- Longer: steadier at speed
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- +10 mm
- Longer: more planted
The two frames
Polygon Siskiu T T8 UDH, MTransition Smuggler Carbon XO, LDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Polygon Siskiu T T8 UDH M | Transition Smuggler Carbon XO L | Difference |
|---|---|---|---|
| Reach | 465 | 485 | +20 mm |
| Stack | 609 | 625 | +16 mm |
| Head tube angle | 64.5 | 65 | +0.5° |
| Seat tube angle | 71.2 | 72 | +0.8° |
| Effective top tube | 595 | 617 | +22 mm |
| Chainstay length | 430 | 440 | +10 mm |
| Wheelbase | 1214 | 1247 | +33 mm |
| BB height | 337.5 | 340 | +3 mm |
| Standover | 705 | not listed | |
| Seat tube length | 400 | 430 | +30 mm |
| Head tube length | 95 | 120 | +25 mm |
| BB drop | not listed | 35 |
Differences are the Transition Smuggler Carbon XO minus the Polygon Siskiu T T8 UDH. Full charts: 2026 Polygon Siskiu T T8 UDH, 2026 Transition Smuggler Carbon XO.
Where each sits in its class
Polygon Siskiu T T8 UDHTransition Smuggler Carbon XO
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 T8 UDHT8 with UDH | Transition Smuggler Carbon XOCarbon XO AXS |
|---|---|---|
| Frame | Polygon ALX Trail | Transition Smuggler |
| Fork | Fox 34 Performance | RockShox Pike Ultimate Charger 2.1 RC2 |
| Rear shock | Fox Float | RockShox Super Deluxe Ultimate Trunnion |
| Shifter | Shimano SLX M7100 | SRAM Pod Controller Ultimate |
| Derailleur | Shimano SLX M7100 | SRAM X0 Eagle AXS |
| Cassette | Shimano SLX M7100 | SRAM X0 Eagle Transmission |
| Chain | KMC X-12 | SRAM X0 Eagle |
| Crankset | Shimano Deore M6120 | SRAM X0 Eagle |
| Wheelset | Polygon MT6 | crankbrothers Synthesis Enduro |
| Tire | Maxxis Dissector | Maxxis Assegai, Maxxis Dissector |
| Brake | Shimano Deore M4100 | SRAM Code RSC |
| Rotor | Shimano SM-RT54 | SRAM HS2 |
| Handlebar | Polygon EXPERT | OneUp Components Carbon |
| Stem | Polygon EXPERT | ANVL Swage |
| Headset | FSA No 57E | FSA No.42/48/ACB |
| Dropper post | X-Fusion MANIC LC | OneUp Components dropper post |
| Saddle | Linc XTENT | SDG Bel Air 3 |
| Grips | not listed | ODI Elite Flow |
Know what is on every bike.
Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.
Explore the app
