2025 Specialized Turbo Levo 4 Expert vs 2027 Trek Fuel+ MX 9.9 Gen 2

What changes on the Trek Fuel+ MX 9.9 Gen 2

Compared with the Specialized Turbo Levo 4 Expert in S4, the Trek Fuel+ MX 9.9 Gen 2 in XL places the top of the head tube 16 mm higher and 27 mm further forward, relative to the bottom bracket.

Frame stack

+16 mm

Higher front end

Frame reach

+27 mm

Longer frame reach

Wheelbase

n/a

One of the bikes has no number for this

Head angle

n/a

One of the bikes has no number for this

Chainstays

+9 mm

Longer: more planted

The two frames

We can't draw these frames yet. The Specialized Turbo Levo 4 Expert numbers we have for size S4 are missing the head angle and wheelbase. The numbers below still compare.

Geometry side by side

Differences are the Trek Fuel+ MX 9.9 Gen 2 minus the Specialized Turbo Levo 4 Expert. Full charts: 2025 Specialized Turbo Levo 4 Expert, 2027 Trek Fuel+ MX 9.9 Gen 2.

Where each sits in its class

Specialized Turbo Levo 4 ExpertTrek Fuel+ MX 9.9 Gen 2

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.