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Subframe


clivegto

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Look at the thickness of rearsets, caliper brackets, shock mounting hardware. Check shock travel and multiply it by the springrate. Some of these brackets look very skinny but take huge loads.

Look at the length of stock subframes and imagine the loads two up with some luggage. Hanging exhausts of the side.

If you have a very light tail section and your ass is only inches away from that already substantial bit where the tank mounts to, you could probably get away with a very svelte subframe.

Would beef stuff up around the bolt holes though, that's what you see on stock subframes too.

Edited by TLRS
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There are two substantial tubes welded in between the plates

There are 4 holes drilled to hold what seems to be a battery box

Those two features will totally lock the structure solid.

Judging by the last couple of photos, the plates are definitely thinner than the holes drilled to hold the battery box

An 8mm hole would realistically mean 4-5 mm of plate thickness ?

Edited by Joseph
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7 minutes ago, clivegto said:

 

I was thinking along these lines.

Yep i always check surroundings to see what i can estimate thanks to "known" details when it comes to this sort of thing.

4mm alu plate is quite solid, especially if you're doing a "replica" of the structure here and similar bracing points

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17 minutes ago, denisd said:

I think it's 4mm plate, the strength is needed vertically so the thickness of the plate is less important than the fabrication and design of the subframe. 

That's what i was thinking: align a plastic ruler vertically, then try and bend it. Then lay it flat and try and bend it. There is obviously a big difference here.

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8 hours ago, Grove said:

Where’s the best place to get rear subframes made, I’d like mine about 2 inches higher at the rear to lift the rear of the seat a bitIMG_6487.thumb.jpeg.2c96506cbfe3ff3ed3cd6fc4f9008905.jpeg

 

 

Make the subframe up yourself then take it to a welder to stick it together, it's what I do, I get Will to do my aluminium welding at Weab Motors Malton. 

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