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Cervélo Caledonia-5 Red AXS vs Specialized S-Works Aethos 2 - Shimano Dura-Ace Di2

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

The short answer

For a typical all-round rider the Cervélo Caledonia-5 Red AXS comes out ahead (82% against 76%). That is not a universal verdict — change the terrain or the priority and the order can flip.

Cervélo

Caledonia-5 Red AXS

82% for a typical rider

£10,000 at Brand website
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Specialized

S-Works Aethos 2 - Shimano Dura-Ace Di2

76% for a typical rider

£11,499 at Brand website
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What actually separates them

Price
The Cervélo Caledonia-5 Red AXS is £1,499 cheaper — £10,000 against £11,499.
Weight
The Specialized S-Works Aethos 2 - Shimano Dura-Ace Di2 is 0.9kg lighter, which you notice on long climbs more than anywhere else.
Tyre clearance
The Cervélo Caledonia-5 Red AXS takes 41mm tyres against 35mm — the single most common thing buyers wish they had more of.
Climbing gear
The Cervélo Caledonia-5 Red AXS has the easier bottom gear (26 gear inches against 32), which matters more than weight on anything genuinely steep.
Mudguards
Only the Cervélo Caledonia-5 Red AXS takes mudguards, which decides whether it can be your winter bike.

Side by side

Spec Caledonia-5 Red AXS S-Works Aethos 2 - Shimano Dura-Ace Di2
Price £10,000 £11,499
Weight 7.0 kg 6.0 kg
Frame carbon carbon
Groupset SRAM Red AXS 2x12 electronic Shimano Dura-Ace Di2 R9200 2x12 electronic
Stack / reach 1.50 1.48
Tyre clearance 41 mm 35 mm
Lowest gear 26 in 32 in
Mudguard mounts Yes No
Comfort 63 47
Speed 74 83
Climbing 88 77
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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