For 2019, the Smash, Megatrail, Trail Pistol, and Shred Dogg all share the same front triangle. Aside from making production easier, Guerrilla gravity had a larger goal in mind. While other manufacturers have used shared front triangles before, they’ve usually kept it hush hush and discouraged enthusiast tinkering for genre-mutating Frankenbikes.
The Guerrilla Gravity team decided to flip that notion on its head, envisioning a bike platform ecosystem where riders can buy one front triangle, and have everything from a 120mm travel 29er Trail Pistol to a 165mm long travel 27.5 Megatrail. It’s an intriguing idea, especially in a time when most bikes are separated more by 10mm travel increments and spec than front triangle geo changes. The goal is that riders can have a short travel 29er during the week, and swap to a long travel bike for a weekend in the park. Swaps take about 45 minutes and are simple for a decently savvy mechanic. Since Guerrilla Gravity created the bikes with rear end swaps in mind, the process uses minimal tools and is incredibly simple.
Guerrilla Gravity also chose to forgo the traditional sizing increments. Instead, bikes are available in sizes 1-4. While that may seem odd, it encourages people to buy a bike based on fit, and not on what size they rode from another brand. With today’s long top tubes and steep seat tube angles, it makes sense to reevaluate sizing nomenclature.
To add further tunability, Guerrilla Gravity developed a GeoAdjust headset. The frames are equipped with a flip cup headset bearing cup that can be flipped forwards or backward to achieve 10mm of reach adjustment. The lower cup is offered in 0mm and 15mm heights for further stack height tuning. 0 is intended for 29” wheels, while the 15mm is intended for 27.5, but bike nerdery and experimentation are encouraged by GG.
Between the stack height and reach adjustments, the four basic sizes can fit a vast range of riders. Though I’m 6’3” and prefer a slightly undersized bike, I fit just as happily on a size 3 frame in the long position as a 5’10” rider in the short position who liked a slightly longer bike. All frames fit up to a 170mm dropper post, which is a no-cost upgrade at the time of purchase.
The frames also have an intelligent, user-friendly internal cable routing method. Instead of fishing your cables through the frame, Guerrilla Gravity developed a removable door on the down tube that lets you tuck everything neatly out of sight, yet keep it easily accessible for maintenance. They also make a removable bracket to mount water bottle tools or even bananas too. There are an additional two bolt holes under top tube that are water bottle spacing, where you can mount any accessory that uses bottle spacing. To keep things simple, Guerrilla Gravity went with a threaded BB and ISCG05 tabs for those that want a bash guard.