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Lightweight rims

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Lightweight rims

Old 02-09-20, 05:48 AM
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Lightweight rims

I am keen to try building my own lightweight wheels for my brompton 2 speed.

I'd like to retain the same dimensions for fitment of schwalbe marathon tyres.
I have been watching how to thread the spokes in the correct patterns and thought I'd enjoy giving it a go myself.

My question is which rims, spokes and hubs should I get?

I'm guessing I will need 349 rims, 28 holes.

For reference I was reading this thread too ( Brompton Rims? ) and have also seen the following ready made wheelsets on sale:
1. OZR wheels seem to weigh just under 900 grams, price is $440. I recently tried a friends custom brompton with OZR wheels and the rear wheel had a nice 'click' sound similar to my road bike.
2. I noticed I could get some wheelsets on ebay weighing just over 800grams front and rear total, for around 200 ($250)
3. One wheelset was 250 ($325) and is titled as having CX Ray spokes, however in the description it states DT spokes, here's the description taken from ebay:

"FRONT: 74MM 14hole hub (quick release)
REAR: 112mm 21hole hub
Rim: kinlin 349 nbr
Spoke: dt 1.8
Pair weight: 820g"

Would be great to choose the components myself and build my own wheels!
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Old 02-09-20, 10:05 AM
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Kinlin NBR is the lightest metal rim available. It only accepts narrow tires though (Kozak maximum)
There are lighter full carbon rims (~175gr each) but they are NOT recommended for any long descent (heat buildup will literally melt the rim)

If you are lightweight enough, you can just get a ~800gr prebuilt wheelset from ebay or aliexpress directly and save money (and hassle) but they are usually limited to 14/21 spoke front/rear.
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Old 02-09-20, 10:56 PM
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There is a German importer of kinlin rims with the xr22t model with 19mm inside width although it is a little expensive but they have 20 24 28 32 holes.

I ordered 406 rims ddt32 from them before but the cardboard box got crushed. I don't think shipping caused any warping, although there were slight variations in width up to 0.4mm, but that might be due to the tapered brake wall angle and production.

I ordered a hub from them too and it was in it's own mini box that was sliding around in the center void of the rim. You could try ask them to tape down 4 of these mini boxes at 4 separate quadrants of the void of the rim, which would help prevent the wheel from getting crushed on it's side.
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Old 02-09-20, 11:02 PM
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That same shop also has sapim spokes, very short lengths. You could try the double butted 2/1.8/2.

I used sapim nipples with the special lock feature with a dimple. I don't remember if the shop had those. I bought the nipples from bike24 because they had them for cheap with the lock feature. I don't know how effective it is at preventing loosening.

Oh they only have secure lock in aluminum. I wanted brass. Make sure it's polyax too. 12mm or 14mm depend on the profile of your rim but usually 14mm

Last edited by tomtomtom123; 02-10-20 at 07:31 AM.
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Old 02-10-20, 03:41 AM
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I also ordered parts and wheels from Ginkgo. they have parts difficult to find elsewhere like special Birdy disc front hub.

If you are ready to pay the price, they have the excellent Sapim CX-ray flat spokes in short lengths.
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