Firefly Bicycles: Off Road Bike? Mar 15, 2012

Man oh man. Now that’s a bike fit for some off-road action. But it does bring up a rather hot topic as of late: disk brakes on road bikes? Personally, when it’s on a bike like this, I love them but a racing road bike? Not so much. Firefly Bicycles, once again, building sexy and sometimes controversial bikes!

  • Ahab

    I’ve been riding everything on my recently acquired Traitor Rueben. Road miles and park laps, XC trails with 32cc cx tires — it’s a blast. Hooray for versatility.

    • tylr

      Fenders/rack mounts? Looks like a solid bike.

      • Ahab

        Got ’em both. Really happy with the bike.

  • tommaso

    I’m not sure discs would offer a significant braking advantage on road racers, but they would lead to very different structural designs, adding some weight. Consider this: the further your brake is positioned from the hub, the more braking force on the wheel you need to stop. So a rim brake can get away with less force, since it is positioned the furthest from the hub. By contrast, a disc brake is close to the hub, so the frame and fork mounts that hold the calipers in place have to be really beefy, to withstand the extra force. If you look at some ultralight road frames like a Cervelo R5, they would never be able to hold disc brake calipers with such seat stays.

    • Buddbikes

      Thing is you can run all the braking force to the chain stay and remove one last impediment to allowing the seat stay to be tuned for nothing but ride feel with them freed from the requirement that they withstand braking forces.  You can also then push down the weight of the rim by not requiring that it has a thick, flat braking surface.

      • Sascha

        It’s a commuter, not a race bike…

  • tommaso

    I’m not sure discs would offer a significant braking advantage on road racers, but they would lead to very different structural designs, adding some weight. Consider this: the further your brake is positioned from the hub, the more braking force on the wheel you need to stop. So a rim brake can get away with less force, since it is positioned the furthest from the hub. By contrast, a disc brake is close to the hub, so the frame and fork mounts that hold the calipers in place have to be really beefy, to withstand the extra force. If you look at some ultralight road frames like a Cervelo R5, they would never be able to hold disc brake calipers with such seat stays.

  • Dontcoast

    If I could have one bike, this might be it. damn that’s nice.

  • Editor

    I would just love to get sideways screaming down the Col du Tourmalet on this thing.

  • trev

    this shit makes me wanna cry. big heavy discs and fenders on a nice frame. horrible!

  • MATT

    Fuck Yeah for disc’s on commuting bikes. Fancy version of my Portland.

  • i honestly really like the aesthetic of fenders and disc brakes on a road frame, didnt think i would. but this build looks really clean

  • Timo Espo

    That is an cyclocross frame, not road ? UCI legal, I guess… riding in rain and mud with fenders might not be sexy, but keeps the mud out of ones face :-) .