2021 Specialized Rockhopper Expert vs 2019 Trek X-Caliber Frameset

What changes on the Trek X-Caliber Frameset

Compared with the Specialized Rockhopper Expert in XS, the Trek X-Caliber Frameset in L places the top of the head tube 50 mm higher and 74 mm further forward, relative to the bottom bracket. Its wheelbase is 80 mm longer, which can contribute to stability at speed.

Frame stack

+50 mm

Higher front end

Frame reach

+74 mm

Longer frame reach

Wheelbase

+80 mm

Longer: steadier at speed

Head angle

+1.3°

Steeper: sharper steering

Chainstays

−2 mm

About the same

The two frames

Only the Specialized Rockhopper Expert is drawn. The Trek X-Caliber Frameset numbers we have for size L are missing the seat angle.

Geometry side by side

Differences are the Trek X-Caliber Frameset minus the Specialized Rockhopper Expert. Full charts: 2021 Specialized Rockhopper Expert, 2019 Trek X-Caliber Frameset.

Where each sits in its class

Specialized Rockhopper ExpertTrek X-Caliber Frameset

Each bike is ranked against the other XC 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.