2027 Trek Madone SL Gen 8 First Replica vs 2026 Specialized Tarmac SL8 Pro Shimano

What changes on the Specialized Tarmac SL8 Pro Shimano

Compared with the Trek Madone SL Gen 8 First Replica in M, the Specialized Tarmac SL8 Pro Shimano in 61 places the top of the head tube 66 mm higher and 24 mm further forward, relative to the bottom bracket.

Frame stack

+66 mm

Higher front end

Frame reach

+24 mm

Longer frame reach

Wheelbase

n/a

One of the bikes has no number for this

Head angle

+1.1°

Steeper: sharper steering

Chainstays

±0 mm

About the same

The two frames

We can't draw these frames yet. The Trek Madone SL Gen 8 First Replica numbers we have for size M are missing the seat angle. The numbers below still compare.

Geometry side by side

Differences are the Specialized Tarmac SL8 Pro Shimano minus the Trek Madone SL Gen 8 First Replica. Full charts: 2027 Trek Madone SL Gen 8 First Replica, 2026 Specialized Tarmac SL8 Pro Shimano.

Where each sits in its class

Trek Madone SL Gen 8 First ReplicaSpecialized Tarmac SL8 Pro Shimano

Each bike is ranked against the other road 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.