BH PRISMA/SHIMANO ULTEGRA 6700 COMPLETE BIKE

We’re not sorry to say that we love it when high end style and grace trickle down from the high end to more affordable bikes. The Wilier Izoard is one such example. The BH Prisma/Shimano Ultegra Complete Bike is another. From a distance, you’d be entirely convinced by its imitation of the G5, BH’s flagship road machine. However, the Prisma is built with more than just pro-level racing in mind.

While the G5 is for the best of us, the Prisma is for the rest of us. There are material differences, of course, and BH intends the Prisma to be a more comfortable bike. The key differences are in the geometry of the frame and fork. BH uses a classic recipe for comfort – longer chainstays, longer wheelbase, and taller head tube. Don’t be fooled into thinking that this is a novice bike and not meant for serious riding. That is not the case. The Prisma can carve a sweeping downhill corner right alongside the G5, though the steering feel is a bit more stable and predictable. Ultimately, what you’d notice between the two has to do with comfort. And the score, here, has to go to the Prisma.

The Prisma frame and fork are constructed as one-piece structural units. Their monocoque design allows perfect uniformity in the lay-up. The BH full carbon dropouts are exactly what you’d find on the G5, and they’re formed along with the rest of the frame. This process assures continuity throughout. The result is a more durable structure. The Pressfit 30 bottom bracket is carbon fiber as well. The bottom bracket cups use nylon sleeves, eliminating the need for additional alloy inserts to be used in the shell. This effort towards a homogenous structure allows the Prisma to be light without sacrificing strength or stiffness in the least.

The Prisma is an exercise in subtlety. The top and down tubes morph from slightly ovalized in the vertical plane, to slightly oval in the horizontal plane near the intersection with the seat tube. It’s at these intersections where the monocoque design stands out. You see, BH engineers have carefully optimized the number and orientation of the carbon fibers to obtain stiffness and strength. This goes hand-in-hand with the oversized 1.5” tapered head tube and bottom bracket area. The chainstays follow a similar design path. Their massive vertical section resists even the most brutal efforts against the pedals.

We have the Prisma here with a Shimano Ultegra component group. From Shimano you’ll get their derailleurs and shifters. FSA gets a lot of billing here as well by providing the integrated 1-1/8” to 1.5” headset, the Energy Titan handlebar, a Gossamer Pro compact crank, a Wing Pro Compact Omega crankset, and an OS-150 stem. It rolls on Shimano RS20 wheels and Vittoria Rubino Pro tires.

The BH Prisma/Shimano Ultegra Complete Bike is available in Green and White. It comes in five sizes from X-Small to X-Large.

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Prisma/Shimano Ultegra 6700 Complete Bike Price:  $2999.00