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Specialized Roubaix SL8 Expert - Shimano Ultegra Di2 vs Cannondale Synapse Carbon 2

Both are endurance bikes at a similar price. Here is what actually separates them.

The short answer

These two score within 1 point of each other for a typical all-round rider, so there is no single winner — the right one depends entirely on which of the differences below you care about.

Specialized

Roubaix SL8 Expert - Shimano Ultegra Di2

76% for a typical rider

£5,249 at Brand website
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Cannondale

Synapse Carbon 2

75% for a typical rider

£5,995 at Brand website
✓ Checked *

What actually separates them

Price
The Specialized Roubaix SL8 Expert - Shimano Ultegra Di2 is £746 cheaper — £5,249 against £5,995.
Weight
The Specialized Roubaix SL8 Expert - Shimano Ultegra Di2 is 0.2kg lighter, which you notice on long climbs more than anywhere else.
Riding position
The Specialized Roubaix SL8 Expert - Shimano Ultegra Di2 sits you more upright (1.56 stack-to-reach against 1.52). The Cannondale Synapse Carbon 2 is the more aggressive of the two — quicker if you can hold it, harder work if you cannot.
Tyre clearance
The Cannondale Synapse Carbon 2 takes 42mm tyres against 40mm — the single most common thing buyers wish they had more of.

Side by side

Spec Roubaix SL8 Expert - Shimano Ultegra Di2 Synapse Carbon 2
Price £5,249 £5,995
Weight 8.2 kg 8.4 kg
Frame carbon carbon
Groupset Shimano Ultegra Di2 R8170 2x12 electronic Shimano Ultegra Di2 R8100
Stack / reach 1.56 1.52
Tyre clearance 40 mm 42 mm
Lowest gear 27 in 27 in
Mudguard mounts Yes Yes
Comfort 73 68
Speed 53 53
Climbing 71 68
Value 0 0

Neither might be the right answer

This page assumes an average rider. Tell us how you actually ride and we will rank these two against everything else at the price.

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