2025 Basso SV Shimano Dura Ace vs 2024 Specialized Tarmac SL7 Sport

What changes on the Specialized Tarmac SL7 Sport

Compared with the Basso SV Shimano Dura Ace in 53, the Specialized Tarmac SL7 Sport in 58 places the top of the head tube 39 mm higher and 15 mm further forward, relative to the bottom bracket. Its wheelbase is 19 mm longer, which can contribute to stability at speed.

Frame stack

+39 mm

Higher front end

Frame reach

+15 mm

Longer frame reach

Wheelbase

+19 mm

Longer: steadier at speed

Head angle

+1.0°

Steeper: sharper steering

Chainstays

n/a

One of the bikes has no number for this

The two frames

We can't draw these frames yet. The Basso SV Shimano Dura Ace numbers we have for size 53 are missing the chainstay length. The numbers below still compare.

Geometry side by side

Differences are the Specialized Tarmac SL7 Sport minus the Basso SV Shimano Dura Ace. Full charts: 2025 Basso SV Shimano Dura Ace, 2024 Specialized Tarmac SL7 Sport.

Where each sits in its class

Basso SV Shimano Dura AceSpecialized Tarmac SL7 Sport

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.