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Road Bike

Cannondale SuperSix EVO vs Specialized Tarmac SL8

These are two elite race bikes aimed at the same rider, but they do not feel the same once you look at the geometry. The current SuperSix EVO mixes low weight with Cannondale's SAVE compliance. The Tarmac SL8 stays the lighter, sharper option. Fit and road feel usually decide this one.

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Cyclist considering which bike to choose

Side-by-Side Overview

Cannondale SuperSix EVO

$3,500 - $13,000

Best for: All-rounder racing with comfort margin for long days

Strengths

  • •4th-gen frame ~770 g with deeper aero tubes than gen 3
  • •SAVE micro-suspension at fork and seatstays
  • •Tall stack at size 54 vs Tarmac - friendlier for non-elite fits
  • •30 mm dropped seatstays plus 32 mm tire clearance
  • •Wide US dealer network for warranty and fit

Considerations

  • •Integrated cockpit on Hi-MOD complicates stem swaps
  • •Not as light as the Tarmac SL8 at the top build
  • •LAB71 top-tier pricing rivals Tarmac S-Works

Specialized Tarmac SL8

$5,000 - $14,000

Best for: WorldTour climbing, crits, and one-bike racing

Strengths

  • •Sub-700 g FACT 12r frame at S-Works
  • •Aero gains over SL7 without weight penalty
  • •Body Geometry sizing across 7 sizes (44-61 cm)
  • •Roval Rapide cockpit standard on top builds
  • •Largest US dealer / service network of any race brand

Considerations

  • •Premium pricing across the build matrix
  • •Aggressive stack/reach less forgiving than SuperSix EVO
  • •Integrated cockpit limits stem-length tweaks

Head-to-Head Comparison

Reach (54)
Cannondale SuperSix EVO388 mm
Specialized Tarmac SL8384 mm
Stack (54)
Cannondale SuperSix EVO527 mm
Specialized Tarmac SL8544 mm ✓
Frame weight (top build)
Cannondale SuperSix EVO~770 g
Specialized Tarmac SL8~700 g ✓
Tire clearance
Cannondale SuperSix EVO32 mm
Specialized Tarmac SL832 mm
Compliance features
Cannondale SuperSix EVOSAVE micro-suspension ✓
Specialized Tarmac SL8Standard layup
Size count
Cannondale SuperSix EVO7
Specialized Tarmac SL87
Entry price
Cannondale SuperSix EVO$3,500 ✓
Specialized Tarmac SL8$5,000
Dealer network (US)
Cannondale SuperSix EVOWide
Specialized Tarmac SL8Very wide ✓

Size Chart Comparison

Cannondale SuperSix EVO
Size 44
Stack:
489 mm
Reach:
376 mm
Size 48
Stack:
503 mm
Reach:
380 mm
Size 51
Stack:
518 mm
Reach:
384 mm
Size 54
Stack:
527 mm
Reach:
388 mm
Size 56
Stack:
559 mm
Reach:
392 mm
Size 58
Stack:
587 mm
Reach:
395 mm
Size 61
Stack:
613 mm
Reach:
400 mm
Specialized Tarmac SL8
Size 44
Stack:
501 mm
Reach:
366 mm
Size 49
Stack:
514 mm
Reach:
375 mm
Size 52
Stack:
527 mm
Reach:
380 mm
Size 54
Stack:
544 mm
Reach:
384 mm
Size 56
Stack:
565 mm
Reach:
395 mm
Size 58
Stack:
591 mm
Reach:
402 mm
Size 61
Stack:
612 mm
Reach:
408 mm

Geometry Comparison Chart

Loading chart…

Source-backed geometry used in this table

For now this pilot only covers stack and reach. We still do not have standover, top tube, wheelbase, or angle data in a verified record here, so the page stops short of making a stronger fit call.

Sizing Comparison

Both brands use familiar road numbers, but the shared 54 label is misleading. The SuperSix EVO 54 sits at 527 / 388. The verified Tarmac SL8 54 sits at 544 / 384. That makes the Cannondale 17 mm lower in stack and 4 mm longer in reach. The jump to 56 is also bigger on the SuperSix, so riders between 54 and 56 should match the bike they already ride rather than assume the same number transfers cleanly.

Verdict

Pick the SuperSix EVO if you want a race bike that gives you a bit more breathing room on long rides and rough pavement. Pick the Tarmac SL8 if low weight and a tauter race feel matter more, and you already know you are comfortable on an aggressive front end.

Best for Comfort

Cannondale SuperSix EVO - SAVE micro-suspension takes more edge off rough roads, even though the verified Tarmac 54 sits taller at the front.

Best for Performance

Specialized Tarmac SL8 - the lighter frame still has the edge when the course tilts uphill.

Cannondale SuperSix EVO vs Specialized Tarmac SL8 FAQ

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Sizing Guides for These Brands

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Full Size Charts for These Brands

Cannondale size chartFrame sizes by height and inseam across the Cannondale rangeSpecialized size chartFrame sizes by height and inseam across the Specialized range