Sounds like you need the Ring, from One bikes. It will rule them all. 
I’d still encourage you to try running the Crux on the road for a bit and see how you like it.
You’ve forced my hand - My most recent Ti build needed a theme and being a lotr fan and gold being one of the available ano options I went with a gold and black motif so as the make it “the one bike.” For the extra nerdy if I’m going with horse names from the fiction this one is Nahar (dust off your silmarillion) cuz that horse was gold and silver. I’ve yet to post pics on this forum. But I digress.
But to @OliverTwist - You both can and can’t have one bike to rule them all depending on your tolerance for shortcomings in one direction or the other in regards to handling or capability. I’m of the mind that n=2, maybe 3, is ideal for my situation. n=2 at the least because considering you’re posting here I’m guessing you’re pretty enthusiastic about cycling and might be bothered if you don’t have a bike to ride due to a mechanical issue of sorts that requires a part that takes days to arrive. As such with at least 2 bikes you’ll always have something to ride.
As far as road/gravel overlap you’ll either find yourself wanting in the tire clearance department from the road side or the snappier geometry on pavement department from the gravel side. I had a road bike that had narrow clearance and a traditional, very nimble geo that I wasn’t quite cool with. My current gravel bike isn’t a so much gravel as it is a dirt road endurance bike with rather nimble geo for a gravel bike that’s closer to say a BMC road machine but clears a 45. I went through a period trying to decide if I wanted a new road bike with calmer geo or use the “gravel” bike and adapt it for road. After an experience where I did road bike the gravel cuz the road bike was laid up with a power meter issue so only one crank arm and also a gravel excursion to vermont with a lot of pavement I decided the gravel bike would make a decidedly boring road bike (for comparison said gravel bike has a shorter wheelbase, front center and steeper head angle than your crux). I went with a custom geo Ti road that came out similar to a giant defy or the new Aethos (didn’t know at the time that I was on trend). This thing is nigh “one bike to rule them all” with 35c clearance so kenda alluviums fit and function well on it and damn if it doesn’t handle easy gravel quite well. And it’s still nimble enough to be exactly as nimble as I want on the road which is where I spend most of my time. I took it on a gravel event that the previous year I used my “gravel” bike and I’ll say it did a great job, but not without shortcomings. There were many paved sections so this year I opted to favor those over the chunk and gnar. It did leave me wanting for bigger rubber in those chunk and gnar sections which still leaves room for a dedicated gravel bike, not to mention one with a higher and shorter front end than my road bike.
So long story short, you might find riding a gravel bike on road boring and sluggish, even your crux with road wheels/rubber, where as a road bike with “wide enough” tires might be close and almost capable but a little too twitch, too rough, and put your face too close to the action for gravel comfort. So yes, have 2 bikes but with a bit of overlap in capability. Truth be told I’ve now got an eye cocked at the trek checkmate or something like it for my n=3. A full sus gravel bike that overlaps with a hard tail a bit but doesn’t need different wheels. Can handle the extra chunky forest roads but maybe falls a little short on real MTB stuff.
Unless you are a pro or very competitive state elite rider, any will do the job, since it is the monkey not the bike. I use a checkpoint slr which is very comfortable vs my previous aerodynamic road bike, one set of road tires and one set of gravels. And depending of my physical condition and training I can challenge those on high end enve wheels ceramic, bla, bla bla, on the road. You can just ride on gravel tires and still maintain the pace of your peloton. For me is very convenient just 2 bikes (checkpoint and a xc mtb) and I enjoy occasionally competing on local races, mtb, gravel or road. Just look the one you fit comfortable and enjoy your rides.
Agree that it’s mostly about the rider, but I do think it depends on what your objectives are and how competitive you want to be. I don’t road race any more, so a gravel and XC bike are all I need for my focus on gravel racing and marathon XC. The gravel bike is more than good enough for road training and fast group rides on the road (even with gravel tires). But if road racing was still a focus, the aero penalty of the gravel bike is big enough that it would bother me and potentially affect results. Most of my best results on the road were solo finishes or small breaks where ~10 watts of aero advantage becomes non-trivial when spending extended time in the wind. The weight wouldn’t matter to me, a couple lbs isn’t going to alter my race results in any road race that I’d sign up for (ie - I’m way too heavy to be competitive in a road race with extended climbing regardless of bike weight).
Totally agree. I was just wondering what your original motivation to try to get by with just one bike was.
A comparison of the bikes’ geometries on bikeinsights.com shows quite a few differences between the S5 and the Aspero 5. Cervelo claims to have made the Aspero 5 more aero, and that’s great, but with its super low BB, relatively long chainstays, and headtube angle/fork rake, it will make a terrible bike or road racing.
I’ve owned one of the earlier Asperos, which was closer to a road bike than the new version, and it was great to ride on, but you wouldn’t road race it. I currently own a Crux, and its geometry is far closer to being a ‘road bike w/ huge tire clearance’, but I still wouldn’t want to road race it unless I was just racing to participate. It wouldn’t be my choice for any ride where agility and sprinting was a thing. IMO.
You obviously need to post pics now! I’m a big fan of titanium, I use my mosaic gravel bike for gravel & road duties.
Personal preference maybe, but I’ve found road bikes have stuck to the low trail, high HTAs formula for too long. If you go slacker, then bike journos will call it “sluggish”, because that’s what they’ve always known.
Rest of the bikes have evolved, and I find the darty nature being sold to us in road bikes to be a disadvantage.
Think about it for a second, a road bike and crit bike are the same bike, yet you’re supposed to descend down a mountain at 80-100 kph on a geometry that’s built for sprinting? The necessary geometry for road riding falls much more in line with gravel racing, than tight corner crit racing at 30-60 kph IMO.
I have a Ti gravel bike: an all-road build that I asked to lbe a bit more aggressive HT angle than a gravel “truck”. Pics: FF-1169 | Flickr
It’s so so much nicer to ride than my SL3 road bike, when I go back and forth I’m always wondering why I step over the road bike at all.
But you guys aren’t helping convince me that what I need is a set of road wheels for the gravel bike. Of course round Ti isn’t aero and so aero road wheels are a bit silly, but then at least I only have one set of brifters to charge and disc brakes to maintain. With the holidays coming up, don’t we all need SES 4.5’s for our gravel bikes?
I raced a Crux for a couple months and it was ok. But it’s not a road race bike. It’s not super stiff which is great for gravel but not great for crits or road races. It’s also about as aero as a brick. You’re giving up like 30W compared to a true race bike. You can decide how much that matters.
I’d take a look at the SuperX. It’s basically an offroad SuperSix, which is a top race bike. Honestly, it’s what the Crux should be (an offroad Tarmac). Cannondale nailed it with the SuperX. Fits 50s. Aero features. Pretty light (my Lab71 is lighter than my Pro Crux). You can run 2x on it. I’ve been rocking it as my gravel race bike and occasionally throw on some road wheels for tarmac rides. Rides so well on the road. Having done the 1-bike experiment with the Crux and SuperX, the SuperX is the way to go if you race. The Crux option was great, but my only hang up was racing.
I think we only focussed on the Crux, because that’s one of the two bikes the OOP already owns. It should be good enough to judge whether a one-bike strategy can work, me thinks.
Yes, good idea.
Another option are certain aggressive endurance road bikes with clearance for wide tires. BMC’s Roadmachine comes to mind, which officially fits up 40 mm wide tires. Is it as aggressive as a race-orientated road bike? No. But it is more aggressive than many gravel bikes. Of course, you are limited to 40 mm tires, which may or may not be enough.
I tried this with a 3T RaceMax a couple of years ago. It was a fun everyday rig, but didn’t really suit my gravel needs at the time with 38s barely fitting, and left a lil to be desired racing crits with it. I think if I could safely run 42s in the rear, I would have kept it, set it up mullet style and still be riding it.
Before that, I was racing road, gravel, and cx on a Focus Mares and loved it. My allez sprint got wrecked so I used the Focus as my everything for a year or so. Should have never sold that bike.
I sold that RaceMax and used the money to build up a Ventum NS1 and bought a used Giant Revolt. Sold the Revolt a few weeks ago and back to a CX bike as my cx and gravel rig: 2019 Specialized Crux. Which I think would be very fun as a crit racer.
30 watts 
I’m sorry, but that’s some serious marketing speak
I guess the Tour wind tunnel is just marketing speak. Lol.
Just slap a frame bag on like the one DJ had for Sea Otter. With that, I recon you are just as aero as anything else out there when it comes to gravel bikes. It’s expensive for a frame bag. But for an aero dual sport race bike. It’s thousands less. Yes this is how I justify every bike upgrade “its cheeper than buying a bike specifically for my very rare, odd ball usage.” (proceeds to spend my life savings on some wired upgrade)
Yep, that’s exactly what it is in most cases.
Just posted on the Ti build thread so not to clutter up this thread. Enjoy!
Breaking News: Kona 2026 will be completed on gravel bikes because aero isn’t real. Dylan Johnson is going to love this.