2027 Polygon Siskiu T T27 EVO vs 2027 Specialized Stumpjumper 15 EVO Comp

What changes on the Specialized Stumpjumper 15 EVO Comp

Compared with the Polygon Siskiu T T27 EVO in XS, the Specialized Stumpjumper 15 EVO Comp in S6 places the top of the head tube 91 mm higher and 105 mm further forward, relative to the bottom bracket. Its wheelbase is 181 mm longer, which can contribute to stability at speed.

Frame stack

+91 mm

Higher front end

Frame reach

+105 mm

Longer frame reach

Wheelbase

+181 mm

Longer: steadier at speed

Head angle

−1.0°

Slacker: calmer steering

Chainstays

+20 mm

Longer: more planted

The two frames

Only the Polygon Siskiu T T27 EVO is drawn. The Specialized Stumpjumper 15 EVO Comp numbers we have for size S6 are missing the seat angle.

Geometry side by side

Differences are the Specialized Stumpjumper 15 EVO Comp minus the Polygon Siskiu T T27 EVO. Full charts: 2027 Polygon Siskiu T T27 EVO, 2027 Specialized Stumpjumper 15 EVO Comp.

Where each sits in its class

Polygon Siskiu T T27 EVOSpecialized Stumpjumper 15 EVO Comp

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.