The Aspero is hands down, my favorite bike likely because this gravel bike has taken me to some spectacularly beautiful places. The Cervelo Aspero is a terrific adventure or gravel race machine because it has the capability to be a 650b or 700c gravel bike.  I am lucky enough to own the 650b and the 700c Aspero- I’ve named each of them because that’s simply what I do with all my bikes. Theo (the gold 700cc) and Comet (the teal 650b) might be related gravel bikes but are pretty different. Below I’ll dive a bit deeper into the differences between the two and what each bike is best suited for.

Reese Ruland Aspero 700c vs 650b

The 700c Cervelo Aspero: Haul Ass, Not Cargo. 

Let’s start with Theo, the gold 700cc Aspero. I mainly use this bike for mixed surface riding. Obviously, with the larger tires, it is best suited for gravel, but you don't feel slow on the pavement. While the bike is fast, light, and responsive, it can still handle pretty technical gravel roads. I took this bike up and over two 13,000ft passes in Colorado and it handled incredibly well on the super rocky descents. The bike handles like a race bike, but somehow offers you the stability of a gravel bike. Nimble, but not twitchy. The 700x40 tires are perfect for just about any rocky, rutted, gravel road. You’ll want to read more about the TrailMixer that is standard on the Aspero. Depending on position, it changes the rake by 5mm. To quote CyclingTips, “The rearward position is generally used for smaller-diameter setups, while the forward position is used for larger-diameter ones. Both are designed to produce the intended trail of 62mm.”

Reese Ruland Aspero 700c vs 650b

The 650b Cervelo Aspero: Adventure, but Fast. 

Now on to Comet, the teal 650b- It's the fast adventure bike you've been looking for. If you want to adventure, but not be weighed down this is the gravel bike for you. It's designed for the most rugged of terrain. Deep sand, rock gardens, loose gravel- it charges ahead. This bike easily plowed through 16 miles of deep sand in the Utah desert. It comes stock with 650bx47 tires, which give you the confidence of a big bike, but you aren't encumbered by the weight of a huge bike. Also back to the Trail Mixer. Because you can change the trail of the fork, the handling never feels sluggish. If remote and wild roads are your jam, this is your bike.

The Verdict?

Both are amazing bikes. But the good news is, this frame is a two for one deal. All you need to do is switch your wheel set up depending on what adventure you’re headed out on. The general takeaways should are 700cc- Daily (fast) Driver. 650b- Big Boy Back Country rides where you might run into a bit of trouble, aka crazy terrain.

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