Hi, I have had a Trek Domane 4.3 since 2014. It has served me well over a few thousand miles. I upgraded the wheels fairly early on (currently running tubeless Mavic Ksyrium) and I also replaced the chainset a couple of years ago with Ultegra - don't know what the original was, it was Shimano but not 105 and weighed a ton. The combination of these changes transformed the bike (or perhaps I got fitter and lost some weight but I like to think the money was well spent!).


While I am still enjoying the bike, friends now have newer bikes with disc brakes and wider tyres and I have been getting bike envy and I am looking for excuses to get a new bike. Winter cycling here in the UK (especially with all the rain we have had recently) tests the bike - cables start to get sticky, gear changes less slick, usually after the first hour of a ride no matter how well I have cleaned the bike between rides. And I definitely have to apply brakes earlier than friends when a fast descent ends at a junction.


So my question is, has anyone upgraded from an earlier Domane to one of the current models - and did you feel the change worthwhile? The most obvious change for me would seem to be to the SL6 (based on cost as much as anything else). I would gain disc brakes, front ISO (which I am quite keen on for some of my longer rides) and an extra cog on the cassette. But I would sacrifice weight, my current bike (including pedals and water bottle cages) is about 8.17 Kg vs the 9.3 Kg of the SL 6. I would fairly soon replace the wheels (I was thinking the Hunt 33 Carbon Aero at 1347g a pair) adnd run tubeless tyres. I would also switch my saddle over for now. So I would gain back around 730g but still a fair bit heavier than my current bike.


I was wondering if anyone had made a similar switch from old tech to new and if they really noticed the extra weight or whether other benefits outweighed (if you pardon the pun) it?


There is a bike shortage in the UK at the moment. Most Trek bike shops are not having much/any stock in popular sizes but I have found one that has an SLR 7 (2020). It is obviously a big jump up in price but I might just manage it without selling one of the kids. This would obviously give me a lighter bike and Di2 (which appeals after my ride in the rain on muddy roads yesterday and sticky gear changes). But is it worth it? I cannot even get to test ride bikes at the moment so it is a bit of a leap of faith.


I would welcome views from anyone with experience of the new Domane - or if you have experience a similar old to new 'upgrade'. Many thanks.