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  1. T

    Custom Steel Commuter

    Just the bottom bracket shell and the seat tube (and an inch or 2 of the down tube) left from the original frame. The top of the seat tube needs support because it will be separated from the bottom of the seat tube to make room for the rear shock. Used 1/2" square tube. Honed out the inside of...
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    Bottom bracket axle 80mm shell

    Yes, that's right. And as usual, I'm wrong. As for a cartridge style, the US Radwagon 4 uses an 84x154mm; they don't sell online but will if you call.
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    Custom Steel Commuter

    Rectangular tubing in the previous post is tacked into place, connecting the new head tube to the new frame box. And then some MIG welds, complete with plenty of fish eyes... As if those crater cracks didn't give it away, I now see that I should have moved all my scrap practice welds off...
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    Bottom bracket axle 80mm shell

    I don't know much about bikes, but are you sure it is an 80mm shell? Doesn't seem like a standard width. And, what is wrong with the shaft?
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    Custom Steel Commuter

    I'm not yet confident that the bike will be all that ridable, but I'm fairly certain that, with wheels, it will roll, and won't need to be carried :) The 4 short sections of rectangular tubing to attach the new head tube* to the new box frame are notched. I ended up modeling the whole front of...
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    Motor Connector - Readily available?

    Wow, and I thought I had an okay handle on the CA from reading the grin website... Thanks for the input. It seems the "unofficial" guide has info on converting between different types of CA's. Good stuff.
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    Custom Steel Commuter

    Tacking in the connections between the box and the bottom bracket shell. The ugly angle iron and bolts with spacers are fixturing to ensure the new rectangular frame box is lined up and centered along the old down tube (again, all the "red" tubing be cut away). If it is rectangular tube, then it...
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    Motor Connector - Readily available?

    Just on/off. Which is fine. It is the voltage-based that bothers me. I don't want the bike to do a full-amperage rush up to a certain speed every time I touch the pedals. Sure, it is kind of a fun novelty at times, but I much prefer the PAS that adds a set wattage when pedaling. By adjustable, I...
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    Custom Steel Commuter

    Yes, I realized posting that picture that things are getting strange looking. The red frame (along with the plate connecting the head tubes) will be mostly cut away, except for the bottom bracket shell and some of the seat tube. I only plan on building this one frame, so a frame jig seems way...
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    Motor Connector - Readily available?

    Thanks for pointing this out. The bike has a dispaly with little to no adjustability and a controller with voltage-based PAS. I primarily use PAS, not throttle, and I much prefer an adjustable power-based PAS. I was considering replacing the display with a stand alone Cycle Analyst as a...
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    Custom Steel Commuter

    This probably doesn't make much sense to others yet, but here is the rectangular box being fit on to the "jig" (the old bike frame that will eventually be mostly cut away). The bike would be upside down here, with the down tube horizontal across the upper part of the picture.
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    Motor Connector - Readily available?

    This is an OEM ebike with some variation of a bafang fat hub motor. The male and female ends screw together similar to an L1019 motor connector. It appears to be a Higo L1114. Is this a common connector? Does anyone know of an online source to buy just a single (or a couple) sets of these types...
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    Custom Steel Commuter

    The plan is, if this actually turns out to be a rideable bike, to get some type of rectangular hard case battery. The front triangle will be used just to center the new rectangular box frame. Nothing exciting here, but getting the main box shape tacked up.
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    Pictures and some info on my vehicle named 'Beast'

    I don't ride quads, but sitting low seems to make a lot of sense from a stability perspective. Cool. Do you see a need for fenders to protect the rider from direct contact with the tires or indirectly from flinging rocks and mud?
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    Custom Steel Commuter

    The swing arm above will replace the original rear triangle in order to allow for a rear suspension, stretch out the wheelbase for added stability at speed, fit a high-tooth-count chainring, and 2.5"+ wide tire (not sure yet). It is made of 1/2"x1"x0.065 steel tube. The bottom bracket shell...
  16. T

    Custom Steel Commuter

    Had some trouble getting my pictures onto my computer. The swingarm is getting more triangular. I wish I had some more purpose-built clamps. But I don't wish enough to actually go buy any...
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    Custom Steel Commuter

    Thanks. I am using the M3540 thru axle.
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    Custom Steel Commuter

    Time for a rear swing arm! Extending the wheel base will make the swing arm construction easier (no yoke or anything needed), allow for a large chainring, and hopefully add some stability at speed. Taking ideas from the 10 year old fatbike DIY frame on here, I am using 1/2"x1" rectangular...
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    Custom Steel Commuter

    Wow. I will go with something more conventional; a single pivot swing arm, aiming to keep the pivot at about the same point as where the top/tension side of the chain meets the chainring. This guys youtube videos have been amazingly informative: Anyway, here goes a suspension joint. Cut it...
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    Custom Steel Commuter

    Nice! Looks like you enjoyed it and that is was quite a while ago, relatively speaking. My OEM bike is fairly "regular", which has lots of benefits. But, I want to try a direct drive rear hub motor instead of a geared one. Something with an integrated torque arm. I guess, from the selection on...
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    Custom Steel Commuter

    Hello, all. Been reading and trying to learn things on the forum for a while but just joining now. I appreciate everyone’s knowledge here, thank you! Have gotten into commuting to work by Ebike. Have a two OEM bikes, but want something a little different. Something fast and stable that can...
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