Specialized Roubaix SL8 - Shimano Tiagra vs Trek Domane SL 5 Gen 5
Both are endurance bikes at a similar price. Here is what actually separates them.
The short answer
For a typical all-round rider the Trek Domane SL 5 Gen 5 comes out ahead (80% against 74%). That is not a universal verdict — change the terrain or the priority and the order can flip.
What actually separates them
- Price
- The Specialized Roubaix SL8 - Shimano Tiagra is £1 cheaper — £2,499 against £2,500.
- Weight
- The Trek Domane SL 5 Gen 5 is 0.6kg lighter, which you notice on long climbs more than anywhere else.
- Riding position
- The Trek Domane SL 5 Gen 5 sits you more upright (1.58 stack-to-reach against 1.56). The Specialized Roubaix SL8 - Shimano Tiagra is the more aggressive of the two — quicker if you can hold it, harder work if you cannot.
Side by side
| Spec | Roubaix SL8 - Shimano Tiagra | Domane SL 5 Gen 5 |
|---|---|---|
| Price | £2,499 | £2,500 |
| Weight | 9.4 kg | 8.8 kg |
| Frame | carbon | carbon |
| Groupset | Shimano Tiagra R4000 mechanical | Shimano 105 R7120 2x12 mechanical |
| Stack / reach | 1.56 | 1.58 |
| Tyre clearance | 40 mm | 40 mm |
| Lowest gear | 26 in | 27 in |
| Mudguard mounts | Yes | Yes |
| Comfort | 73 | 88 |
| Speed | 37 | 37 |
| Climbing | 58 | 62 |
| Value | 25 | 31 |
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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