• Hi,
    thought about sharing my newest project with you, and asking for some input:

    I just bought a used black 62cm Twin Six Rando frameset for 240 quid on Ebay:

    It's going to be something I have thought about for quite some time:
    A gravel/CX-like bike with 8 or 9 speeds and a Bafang BBS01 250W motor, and unlike most gravel bikes, it will not be set up with road handlebars, but with risers. This is how the Twin Six Rando normally looks: https://vimeo.com/192194084

    The bike will be used mostly on car+bike holidays, going to places like Italian alps, maybe also north european highlands and the likes, where I want to drive to trailheads and then do remote singletracks. The motor will be there to assist on long uphill sections, and because I am old and lazy ;-)
    I might be also considering using the bike for bike-only holidays, then maybe with more racks added.
    I already own the motor but never had the bike for it. I once mounted it on a classic road frame, but it doesn't make much sense, so I am really happy that the Rando is finally a good home for this motor with it's more beefy steel tubing and disc brakes.

    Whats a bit strange is that the Twin Six Rando that I bought is described as "62cm", but there is no 62cm on their website mentioned. Anyway, as the head tube is 20cm, that's good and 58cm top tube is not too long, too. Actually, I am very much like psee and his Orlowski allroad builds, in that I am someone who needs short reach and super high stack, due to a back surgery in the past, and still having some back issues. Therefore, my idea is to run this build not with road handlebars, but with a short stem (40-50mm) and risers. The short stem will reduce the reach, which is a bit too much with a 58cm toptube, and the risers will add some more stack (which I can't have enough of, even considering that the frame that I have bought has some extra length left on the fork steerer).
    What I am wondering is: I am VERY used to riding ~40-42cm Nitto risers in the city. I really don't get along with typical +700mm MTB/CX risers, and I am wondering what a good solution would be in this build? Also considering that I need a bit more grip space as I have to fit at least one shifter pod. Maybe a Nitto B267? That would be 52cm, 10cm more than I am used to, and it has a 31.8mm clamping area. Maybe combined with a Thomson 40mm elite stem. Let me know if you have other ideas.

    Here's a quick and dirty mockup, let me know what you think! (the motor not added yet):

    Normal twin six rando:

    My sketch (see attachment):


    1 Attachment

    • rando.jpg
  • Would really appreciate to get some input, especially on the "risers on gravel bike" thing! Realised that the NITTO B801AA might be a better choice, but it gets me into the ~700mm width again.
    Is there a (high) riser with 31.8mm clamp in the ~600mm range? Googled for some hours but without success

  • a Bafang BBS01 250W motor

    this excites me immensely

  • I have some black Truvativ 40mm risers that are around 600mm, you want? I too like a nice upright position on my bike!

  • Thanks, actually looking for at least 2-3" (50-70mm rise). The BLB Big Smoke OS Riser Bar with 76mm rise is a bit like that, but it's quite wide, too. In the BMX/dirtjump world are some more, but rarely 31.8mm.

    this excites me immensely

    amey: irony?

    Another thing I'm wondering: why do gravel bikes never come with suspension forks? Wouldn't it make sense, just like on XC mtbs?

  • not at all, I am actively looking at e-bikes.

  • cool. I think that steel gravel bikes are the perfect platform for a mid motor like the Bafang, because the frames are usually very strong and can deal with the extra stress that you have with a motor, same for the brakes, having disc brakes will be a good choice with all the extra speed and power that comes with the motor. The Bafang is nice because there is a great third party app out there to hack all the parameters and adjust it exactly how you want it, all you need is a Bafang to USB cable

  • Sounds like a laugh! What's stopping you from getting some of the wider bars you've been looking at and cutting them down?

  • It's not as simple as that. Those typical ~720-730mm bars have a grip area of around 200mm. If you have shifter pods, you will need 170-180mm of grip area, i.e. you cut max to ~680mm, not much won. But it would be possible to imagine a narrower bar with tighter bends. Those 730mm have very relaxed, smooth curves, not very space saving.

  • This reminds me of a project a while back, someone was making a fixed e-bike with a ferocious motor. Wonder what happened. Anyway, this sounds promising!

  • Very jealous, always wanted one of these.

  • Ah right, that makes sense!

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62cm Twin Six Rando (steel disc gravel/cx), set up with risers, and electrified (Bafang BBS01)

Posted by Avatar for jetski @jetski

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