Slimy38
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| posted on 5/2/26 at 04:31 PM |
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Changing design weights
After my IVA fail, I've got the mechanical bits scheduled for the next couple of weekends. But I wanted to make a swift start on one issue, which
is the design weights. I put 361Kg for axle 1 and 409Kg for axle 2, for a combined gross weight of 770Kg. They calculated it at 331Kg axle 1 and 430Kg
axle 2, 762Kg combined. To be honest I'm impressed how close I was, but obviously having my design weight lower than actual is the kicker
here.
How do I change the design weights? One thing I was looking at said put the new weights on the manufacturer plate, does that override the values on
the application form? I did the form electronically so I am expecting to have to make the change either by email or by snail mail.
I've sent an email to approvals@dvsa.gov.uk who were looking after my initial application, is that a reasonable place to start?
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Slimy38
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| posted on 6/2/26 at 07:57 AM |
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Well, I started this morning with an email in my inbox saying that they've made the changes. There was me thinking it was going to be an uphill
battle with all sorts of evidence and letters to submit, and instead it was 'yep, all done, fix the other defects and submit it for a
retest'.
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JAG
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| posted on 6/2/26 at 08:00 AM |
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Hmm DVSA being helpful, it sounds like a trap to me 
...but if it's fixed then that's good news, probably 
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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Slimy38
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| posted on 6/2/26 at 09:23 AM |
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quote:
Originally posted by JAG
Hmm DVSA being helpful, it sounds like a trap to me
...but if it's fixed then that's good news, probably
LOL, it's not just me with that mindset then, I'm now worried that it was far too simple and it'll fail the retest on a technicality! I
have the email though so I'll print it and take it with me.
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gremlin1234
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| posted on 6/2/26 at 09:52 AM |
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that is good,
I thought most people put weights as 450/450/900 to give flexibility.
weights are used for tyre suitability, braking performance,
and I can't think of anything else
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JAG
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| posted on 6/2/26 at 11:19 AM |
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quote:
I have the email though so I'll print it and take it with me
A very wise move IMHO
Justin
Who is this super hero? Sarge? ...No.
Rosemary, the telephone operator? ...No.
Penry, the mild-mannered janitor? ...Could be!
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russbost
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| posted on 6/2/26 at 11:27 AM |
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What have you changed it too? In your other message you mentioned weights in the low 400's (Kg), the design weight (Max DGW) is the total weight
of car full of fuel luggage & passengers & should then have a bit more added to give "headroom", but you don't want to go too
high or it will fail on brake test!
I would get advice from the actual manufacturer HTH
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Slimy38
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| posted on 6/2/26 at 02:40 PM |
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quote:
Originally posted by russbost
What have you changed it too? In your other message you mentioned weights in the low 400's (Kg), the design weight (Max DGW) is the total weight
of car full of fuel luggage & passengers & should then have a bit more added to give "headroom", but you don't want to go too
high or it will fail on brake test!
I would get advice from the actual manufacturer HTH
I'm classed as the manufacturer on this one 
I've put it as 400Kg for the front and 500Kg for the rear. That's what the examiner suggested, I asked whether the brake test would need to
be redone and he said no.
I think that 'not wanting to go too high' was what scuppered me, I was trying to be decently accurate but without having decently accurate
scales.
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