Boo Bicycles has been making carbon fiber-and-bamboo bicycles for years now, but they keep refining the process. The latest iteration becomes the new premium SL offering, which not only drops weight from the frames, but makes them stiffer and stronger, too.
Above is the new SLG top-level gravel road bike, and this one’s built for Boo’s Nick Frey to race at this year’s Dirty Kanza and Crusher in the Tushars.
The upgrade is a new way of forming the top and downtubes. On their normal tubes, they hollow out the bamboo. On these, they hollow it out even more, making it lighter, then an S2 fiberglass load dispersion material is placed on the inside of the bamboo tubes and is cured while under compression from the inside. The result is a tube that’s much more impact resistant. Frey told us there tends to be a lot of downtube damage on composite frames in events like the Dirty Kanza, coming from really sharp gravel flying off the front wheel. Frey says they took a normal bamboo tube and smashed it on a table corner and it cracked, but repeated blows with the new S2-enhanced tubes didn’t show any damage.
But those aren’t the only changes growing on this bike…
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