A true quiver killer of a trail bike, the Crumble is just at home on long flowy rides as technical steeps. The Crumble is a true modern classic.
The Sour Crumble. A tasty bit of trail bike, made even tastier. Modern downcountry? Trail bike? The one for anything? The one for everything?! Yeah probably.
Nestled comfortably into trail mountain bike territory, the Sour Crumble is a fantastic and well-rounded mountain bike built for 120-140mm travel and everything from downcountry to long alpine descents. Truly a multi-talented platform.
We love the Crumble for its mild manners and shred-ability. We’ve seen people ride the Crumble in bike parks and bike races, and watched friends of ours who are much better at MTBs than we are just absolutely shred the wheels off this thing. You just love to see it!
In 2022 we updated the geometry to “keep up” with modern trends, but even then, we had very little work to do. 66,5° headtube and 425mm chainstays pair with a 467mm reach in size large. If those numbers mean nothing to you, don’t worry; just imagine I said “bikes are super cool” a bunch of times.
All of this, built by hand in Saxony!
All day geometry for all day shred.
The Crumble is our flagship trail bike. It’s the oldest bike in our line-up because we believe that no all-bike stable is complete with a solid trail bike, and the Crumble is that trail bike. It’s all in the name; sure, there are fancier desserts, but let’s be real, is there anything better than a nice warm slice of apple crumble (and maybe a little vanilla ice cream)?
We put a big ol’ 44mm headtube on the Crumble, ready for a beefy bottom external cup headset to offer all the durability and all the steering stiffness you need. Pair this front end stiffness with the natural light-flexibility of steel at the rear end, and a yoke’d bottom bracket area, and you get a really, really well handling bike. Trust us, we’re scientists*
We ovalized the top tube, as well as a bit of the seat tube for better power transfer. All of this is paired with two to three bottle cage mounts for all the Go Far H2O™ you’d need. Stealth dropper routing, semi-internal cable routing… the gang’s all here! We love the Crumble, we ride the Crumble everyday. It’s truly the only bike that literally everyone at Sour owns, and that’s because it covers all ends of the MTB’ing spectrum!
*To be clear, no one at Sour is an actual scientist
Flying pie, shredded apples, lattice crust.
Every year we look at the Crumble and every year we wonder “what can we improve?”. And sure, we’ve made the necessary adjustments here and there, a little extra clearance here, a lighter yoke there, maybe a hair slacker headtube, but that’s it. Some bikes just hit the mark, and honestly, “don’t change a winning team” couldn’t be more true with the Crumble.
Right behind Sour HQ in Dresden is the Dresdner Heide, a forest full of scenic vistas, and most importantly, hand-cut trails everywhere. It’s terrain like this that inspired the Crumble. All day pedal-ability, but with the right geometry to handle anything when the going gets rad.
