Cervélo Caledonia-5 Ultegra Di2 vs Specialized Aethos 2 Pro - SRAM Force AXS
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 Ultegra Di2 comes out ahead (79% against 77%). That is not a universal verdict — change the terrain or the priority and the order can flip.
What actually separates them
- Price
- The Cervélo Caledonia-5 Ultegra Di2 is £249 cheaper — £7,000 against £7,249.
- Weight
- The Specialized Aethos 2 Pro - SRAM Force AXS is 0.7kg lighter, which you notice on long climbs more than anywhere else.
- Tyre clearance
- The Cervélo Caledonia-5 Ultegra Di2 takes 41mm tyres against 35mm — the single most common thing buyers wish they had more of.
- Mudguards
- Only the Cervélo Caledonia-5 Ultegra Di2 takes mudguards, which decides whether it can be your winter bike.
Side by side
| Spec | Caledonia-5 Ultegra Di2 | Aethos 2 Pro - SRAM Force AXS |
|---|---|---|
| Price | £7,000 | £7,249 |
| Weight | 7.4 kg | 6.7 kg |
| Frame | carbon | carbon |
| Groupset | Shimano Ultegra Di2 2x12 electronic | SRAM Force AXS E1 2x12 electronic |
| Stack / reach | 1.50 | 1.48 |
| Tyre clearance | 41 mm | 35 mm |
| Lowest gear | 29 in | 29 in |
| Mudguard mounts | Yes | No |
| Comfort | 63 | 47 |
| Speed | 69 | 83 |
| Climbing | 78 | 85 |
| 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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