Does anyone have cad data or part drawings of the inserts for the (C-40) peanut style dropout that allotec makes? Frame builder supply sells the parts, but only has a drawing for the receiver on their site. I’m considering using the modular dropouts for my single speed to future proof it a bit incase it ever needs a derailer.
I’m searching for the C-41, C-42, and C-43 inserts.
I’ve used them a fair amount. Spacing wise, if I take your meaning, you can swap between the 135 qr insert and 142 thru axle, which is cool. It’s a bit of a bummer that your dummy axle needs to be compatible with the threaded DS insert if building with the thru axle insert. The inserts get a bit toasty when brazing the dropouts. It would be super cool if someone made a steel insert for use during fabrication.
Here are the Nova Modular dropouts overlaid with the Allotec C40s . As you can see, they are very similar. The Nova dropouts in BikeCAD only have the 142/12 Thru axle inserts. I’ll be sure to add these Allotec dropouts to the next update of BikeCAD. Thanks for sharing these @Daniel_Y .
Does the axle spacing change when swapping between the QR and track ends? I assume not.
I’m trying to work out a way to incorporate this system onto a carbon road bike (Cervelo R5 with a broken dropout). I reckon I could (with about a year’s worth of learning CAD!) design and 3D print a mould that would combine the peanut shape and mounting holes with a plug-fit for the chainstays and seatstays of the frame. I could then make the frame ends using forged carbon fiber and bond/wrap them onto the frame.
Or a simpler/quicker option might be to cut the dropouts off, bond on the steel frame end and use the frame itself as a pattern to make a mould of the final shape. Alignment might be easier this way, as I could just bolt the dropout chips together on a dummy axle to ensure the mating faces are parallel, the dropout slots are in the right plane and the OLN spacing is right, all at once and on both sides simultaneously (I originally wrote that sentence describing how it would be more difficult, and I realised the solution while typing!).