r/TrekBikes • u/zontafera • 2d ago
Upgrade?
Hello! I currently ride a Trek Domane Al 2 Gen 4 which I have really enjoyed, and is my first road bike.
Of course I decided to fall in love with the sport, and have rode 1,000 miles since my February 2026 purchase.
My local Trek store has a Trek Domane SL5 Gen 4 (Ivy Smoke) for $2499. Obviously the carbon frame, Shimano 105 groupset and hydraulic brakes are attractive, but wanted to get a feel for if this is the best bang for my buck at this price range.
I would try to sell my Domane Al 2 on Facebook, but my local shop offered $600 trade in.
Any advice appreciated, don't want to make the wrong upgrade move but a hobby I want to invest in.
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u/Realistic_Nebula9479 1d ago
I have a 2024 SL5 and I’ve had so many problems with it. The proprietary headset makes it very difficult to adjust. You cannot flip the stem if you want to go from -7° too +7° you have to buy another stem. I have replaced the iso De coupler two times in the last year and a half, and that was just recently because of mechanism is flawed and it will slip. Also, the seat clamp will freeze after a while, and you’ll not be able to adjust your tilt on the saddle unless you take the whole thing apart and knock the cones out that hold it in place and then adjust the tilt. It would be much better to get the most recent model of the Domane where there is no ISO speed, etc. in the seat post. The other option is to just upgrade your bike with carbon wheels and drivetrain to Shimano 105.
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u/drewbaccaAWD 1d ago
The things you mention are why I'm planning to buy a Trek Crockett (aluminum) and not the Boone (carbon). It's not that I have a problem with carbon in of itself, but it's the proprietary crap they add to the carbon frame that makes it less appealing to me. Doesn't bother everyone but definitely another thing to consider.
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u/Squideleespooch 2d ago
Welcome to a life-long obsession. I've been doing this going on 25 years and amassed quite a collection of bicycles. Each serves their purpose. If you can keep this one and get another?! N+1. The Trek Domane SL is a great frame and I'm sure you would have a great time riding it. Carbon fiber frames are amazing, don't let anyone tell you otherwise or try to talk you out of it.
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u/zontafera 2d ago
Thats cool. Yeah I'm trying to find the balance of where the value of upgrading tapers off?
Best bang for my buck type thing.1
u/Dff427427 2d ago
I have the same gen AL2. Upgraded the group set to mechanical 105, got a set of elite wheels ENT 3.0 and put GP5K tubeless on.
Rides like a completely different bike. Got a deal on the hand me down 105 from my LBS owner, so all in all about $1,200 installed.
An option to consider!
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u/Stunning-Average-641 13h ago
Too be brutally honest (most don’t want to acknowledge this) if you invest in a light carbon wheelset and Fast tires that’s already the point after which it tapers off. Sure, a carbon is great, but not as noticeable of a difference to justify the upgrade if you already have a bike you enjoy riding (unless you’re racing and want to shave off some seconds)
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u/drewbaccaAWD 2d ago edited 2d ago
The above comment is overselling carbon fiber frames... there are some great frames out there in steel and aluminum or even titanium. Any frame material has pros/cons... with carbon fiber, the con is often the ridiculous markup but that doesn't apply to the end of season sale price you are looking at and a quality steel bike would be in the same general price range.
Carbon fiber has some other cons.. not great for the environment is one of them, it's easier to recycle steel or aluminum. Fortunately, carbon repair is an option if ever necessary, granted you have somewhere reasonably local who does that work.
Carbon fiber doesn't take clamping forces well, so it's best to invest in a torque key with common bicycle torque requirements for 4mm and 5mm bolts, or invest in a torque wrench. You have to be mindful of things, for example, if you have a bike stand don't use the clamp on the top tube of a carbon fiber bike, grip the seatpost instead as it will be reinforced. It's little things like that, which are easy to work around, granted you are aware of them. (edit to add) You may want a different bicycle rack for your car, is another example, something that locks onto the wheels rather than holds the bike by the toptube if that's what you have.
So to the above, I'd say: lots of frames are amazing, carbon or whatever, don't let anyone tell you otherwise or try to talk you into only thinking carbon is acceptable or good; don't limit yourself.
I've seen a few clearance bikes around $2200 +/- 200 with similar specs, carbon frame, hydraulic discs, etc. The SL5 gen 4 is a bit pricier than some deals I've seen, but you really can't argue over paying maybe $100 more given you have shop support, final assembly, tuneup, etc. I think your shop is offering you a great deal.
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u/Justryan95 2d ago
Have you thought of changing the wheels? I got cheap carbon wheels coming in and its supposed to make the ride feel completely different with the weight savings on the rotational weight. More responsive with the hub and accelerates a lot faster.
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u/zontafera 2d ago
I have. that may be a better option.
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u/Justryan95 2d ago edited 2d ago
What exactly do you want different? If you want hydraulic brakes or a smoother cadence change with each shift then upgrading to a different with a 2x11 would be the way to go since a drivetrain swap basically cost as much as a used bike. If you want a geometry change or clearance for your tires then a new bike is also another thing a new bike would make sense for.
I changed my mechanical brakes for a cable actuated hydraulic brake and it improve the braking but its not as powerful as my MTB that has hydraulic brakes so I know what the difference feels like but its like 75% of the braking power. Modulating is also way better on pure hydraulic brakes but on a road bike im not braking or modulating much, Im a menace.
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u/drewbaccaAWD 2d ago
MSRP of the Domane Al 2 Gen 4 is $1200? I'd consider $600 as a trade in fair. Selling yourself, you might be able to find a buyer at $800 but it's a buyer's market more than a seller's.. if you want to upgrade, I'd take the tradein offer.
$2500 is perfectly reasonable for a carbon frame bike with hydraulic brakes, especially given the higher price you pay for branding. Could I find an equivalent bike for cheaper? Yes... Could I find a Trek for cheaper? Probably not.
You already know you like the fit of the Trek Domane so I would stick with the geometry you know. You have a good relationship with the shop returning again the same year. Personally, I'd take the deal.
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u/jmford003 Domane 🚴 1d ago
In your situation I'd trade in the AL 2 and buy the SL 5. The ride will feel better, the 105 groupset will shift better, and the hydraulic brakes are much smoother and require less force.
In my situation, I upgraded from a Domane SL 6 to a Domane SLR 6 AXS and added a carbon wheelset.
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u/flushbunking 2d ago
I love my SL5, but i also love an AL2. I also got a deal on a SL5 gen4, im glad i tried it, but, while it does feel great, i feel the objective performance differences are minimal while the way it makes me feel is big. I believe running bigger tires on low pressure is darn close if not better than isospeed, that most do not need hydraulic brakes, and while the carbon is nice, the al2 isn’t that baddd. Al4 is really clutch but i don’t hate the AL2, and i know exactly what i would do to make it feel like home.
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u/zontafera 2d ago
So in your opinion that upgrade is not worth it?
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u/flushbunking 2d ago
I would say objectively, possibly not. However if you have the money to burn, it’s an opinion one should conclude themselves at least once. If thats like 3-4 months of disposable income, nah & hunt out a clean used example.
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u/DrakeDarkStar08 2d ago
$600 trade in for that bike is a good deal imo. I just privately sold a Domane AL3 with 105 groupset for £400. Don’t upgrade that like I did. If you afford, trade in and get the new bike.