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Brompton Project

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Brompton Project

Old 06-26-20, 08:09 AM
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weight4it
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Brompton Project

Hi I've just picked up an old P3R Superlight - it has a few issues but I managed to get the seller down on price, and I'm keen to try fixing it myself where possible.

front wheel appears to be standard (non-superlight) version...

there was play in the front wheel, on closer inspection the cone-cup was loose, I regreased the cone-cup bearing, however reinstall shows it doesn't run smooth, bearing feels worn, but it rides ok.


bike was filthy, I spent 2-3 hours cleaning her last night and I think it still needs a final clean but good enough for now...
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Old 06-26-20, 08:13 AM
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Hinge area rusty, going on the basis that the front wheel is non-superlight, I'm also questioning if the headset is the superlight or standard version, can you tell?

main frame rusty, I sprayed inside with GT85 but it will need more work, any tips on how to remedy?

needs work... also seems to be a small gap in the main hinge faces, is this more than usual?
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Old 06-26-20, 08:18 AM
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front fork appears to have a feint crack

same area of cracked titanium fork

lovely colour, is it tempest blue?



brooks saddle & pentaclip weight approx. 900grams
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Old 06-26-20, 08:30 AM
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weight of front wheel and Schwalbe Marathon plus tyre




Lastly the rear hinge has play in it. I might try to get a video of how much movement.


I will be keeping an eye on the front fork, I think a new Asian titanium fork can be had for 170-270 depending on manufacturer.


Looking forward to learning how to get the bike up to a good standard again.


the saddle & pentaclip weight 0.9kg
seatpost is original titanium version including rubber brompton bung and cap head screw 0.36kg


titanium seatpost seems to be the extended length version at just under 600mm didn't realise brompton did an extended ti version.


The rear rack weight is to be confirmed, the brompton builder website is down so I cannot check the weight there but this must weigh a considerable amount.


I might try to get a lighter alternative, or just delete it for now, but I like the way it stands up on the rack for storage/ wheeling along.



my luggage scales are likely to not be accurate...

total weight is therefore 11.1 + 0.9 + 0.36 = 12.36kg


I'll be swapping the saddle for a lighter modern type, should be around 0.3kg so saves 0.5kg overall.




Please feel free to comment, especially on how you have remedied similar issues with components on your bikes.



Will likely swap the P bars for M or S style bars preferably with a bit of backsweep!


Overall I'm really pleased with the bike, it has already taken up my spare time cleaning it and it probably needs lots more TLC,

I'm excited to be working on my first brompton and titanium!

Last edited by weight4it; 06-26-20 at 02:31 PM.
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Old 06-26-20, 01:42 PM
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Looked for some of the 3rd party light substitute parts coming out of Asia? they're into gram counting..

magnet test .. light headset, aluminum with steel race inserts . regular one is just steel.


I have an extra stock front wheel now that I bought a Schmidt dynamo hub for lights without batteries..
So added weight..
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Old 06-26-20, 03:21 PM
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This Brooks saddle is a disaster !

You can have a comfortable saddle weighting 80g !

The original rack is indeed very heavy. If you want to keep the rear mudguard, the best option is a lightweight rack (if you suppress the rear rack you need to add mudguards stays that add weight, the superlight has titanium mudguard stays).

Looking at your pictures, it seems to me that the rims need to be replaced.

The original titanium fork price is now similar to the price of Asiatic copies.
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Old 06-27-20, 07:51 AM
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the new directionally drilled double wall rear is an improvement,

14 gauge spokes would save some weight, Standard spokes are thicker..
20 spoke front wheel perhaps? (My Mk 2 has a 20 hole steel hub)





..
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Old 06-27-20, 01:02 PM
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Originally Posted by Jipe View Post

The original rack is indeed very heavy. If you want to keep the rear mudguard, the best option is a lightweight rack (if you suppress the rear rack you need to add mudguards stays that add weight, the superlight has titanium mudguard stays).
.
or drill holes in the current one.
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