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Specialized Roubaix SL8 Sport 105 vs Fairlight Strael 4.0 105 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 Specialized Roubaix SL8 Sport 105 comes out ahead (74% against 71%). That is not a universal verdict — change the terrain or the priority and the order can flip.

Specialized

Roubaix SL8 Sport 105

74% for a typical rider

£2,800 at Sigma Sports

£100 under RRP. 30-day returns
Unverified

Fairlight

Strael 4.0 105 Di2

71% for a typical rider

£2,995 at Brand website
Unverified

What actually separates them

Price
The Specialized Roubaix SL8 Sport 105 is £95 cheaper — £2,900 against £2,995.
Weight
The Specialized Roubaix SL8 Sport 105 is 0.7kg lighter, which you notice on long climbs more than anywhere else.
Tyre clearance
The Specialized Roubaix SL8 Sport 105 takes 40mm tyres against 35mm — the single most common thing buyers wish they had more of.
Shifting
Only the Fairlight Strael 4.0 105 Di2 has electronic shifting. Crisper and lower maintenance, but it needs charging and costs more to replace.
Mudguards
Only the Fairlight Strael 4.0 105 Di2 takes mudguards, which decides whether it can be your winter bike.

Side by side

Spec Roubaix SL8 Sport 105 Strael 4.0 105 Di2
Price £2,900 £2,995
Weight 8.9 kg 9.6 kg
Frame carbon steel
Groupset Shimano 105 R7100 mechanical Shimano 105 R7100 Di2
Stack / reach 1.56 1.54
Tyre clearance 40 mm 35 mm
Lowest gear 26 in 26 in
Mudguard mounts No Yes
Comfort 74 73
Speed 43 37
Climbing 65 55
Value 18 8

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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