New Front and rear Derailleur , New Chain and New sproket The original SLR 8.9 Carbon was our most popular carbon road bike, and for good reason. We think the light, stiff and comfortable carbon frame designed with aerodynamic tube profiles and features is a perfect platform for all-round road riding, and the reviewers agreed with us. For most bike brands, 4.5 out of 5 reviews and comments like “Blimey, what a corker!” (road.cc) would be a reason to kick back and celebrate a job well done. However, at Boardman, we are always looking for ways we can push our bikes to the next level, and this is what we have done for the new SLR 8.9 Carbon.