New Trek Domane is lighter and faster with a simplified IsoSpeed system and improved aerodynamics

Trek says the fourth generation is the fastest Domane it has ever made, but claims it still has the same cushioned ride

Trek's new Domane SLR 9
(Image credit: Trek Bicycles)

While the new Trek Domane isn’t the first road bike to receive a facelift in the pursuit of a ‘lighter and faster’ outcome, attempting this while maintaining the all-day comfort the bike is known for required quite the balancing act.

Both the fourth generation Domane SL and SLR frames have been redesigned to make them close to 300g lighter than the outgoing models. Trek claims that it's also the fastest Domane it's ever made. However, despite this new “performance tilt”, it is still billed as being as compliant and as versatile as the previous Domane. The result is a bike that appears equipped to walk the tightrope with not just assurance but a little swagger too. 

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