Game changer - 36er CARBON wheel!

After some research, with an 80 kg setup, the rim would break if jumping from 13 cm on a rubber block without tire, and without absorbing any energy in the legs.
Apparently, a rim should be resistant to 85 J to be accepted. 100 seems reasonnable (but I have no idea of the rigidity of the rubber block but I think that for a road usage, it is very good enough. For muni, I am not so sure, but it is probably enough for most persons.

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Got the file also and I’m in the same boat as to what it all means - forwarded to Roger so perhaps we can get a verdict from his technical eye :crossed_fingers:

I guess it would be nice to know the comparison values with the Braus.

I wouldn’t mind accessing their test video with the tyre on - and of course know what their approach to ordering now.

Are they just going to list it for sale or do rider-testing run of rims.

I want to test one but it’ll throw up a few dilemmas for me:

Do I rebuild my 125mm Nimbus rim G36er - in the hope it becomes THE wheel - light and great spoke angles, but at the risk it ends up braking a wheel that is set up and is reliable (esp if the rim from LB ends up being a lemon - unlikely but possible).

Doing this would motivate me to turn my Braus wheel into a symmetrical 36er build on a 32h hub - for an ungeared carbon ride (more suited to that rim I feel)

But we do need to know - and we’re only going to know when riding this LB rim if it feels as good or better than the Braus (and holds up as good - hopefully better, due to being asymmetrical)

My head hurts with the level of unicycle project choices and dilemmas (poor me- not! :sweat_smile:)

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I get your point. I have had a similar dilemma! It’ll be resolved as:

  1. Rebuild my G36er with one of these new 32H rims
  2. Build a new 36H freewheel with one of these new rims
  3. Rebuild my other ungeared 125mm 36er with the old Braus Rim

I’m quite confident LB’s 36er rims will be great, and I’ll be here to test them :grin:

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Here it is in JPG

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Great! Could you also include the second page?

I missed that. Here is 2 of 2

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I’ve been advised the rim will show up online in 2 weeks time.

My invoice is now being worked up for the two rims I want. Worth getting your hub specs as they can drill spoke angles to match.

I will be using a 125mm Schlumpf for this - switching stuff around but can help others if they need their hub specs (got my head around it a bit these last few days).

So in terms of ordering this can be done via an email to their sales team or by waiting for the online SKU.

:smiley:

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Thanks for the news! Have you had a quote yet? Do you also know whether it will be a Recon Pro rim - including longer warranty?

Yes - I presumes others will get the same. I got 10% off and the item price was $350.

But if this 10% was a one off I’m unsure!

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No idea really. But it looks like a Pro series.

I didn’t ask - perhaps I should have be I’d accept the 5 year one which is what I presume they’ll offer.

As I was ordering a non-pro rim and she highlighted that this one wasn’t pro - I kind of read that like the 36ā€ is pro.

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Additionally TPD delivery - the one with TAX included seems to raise (as it should) the more rims in the order.

For me this is $140. Worth bearing in mind

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Thanks for the inputs!
Regarding the TPD delivery, there’s a catch. It doesn’t seem to raise linearly with the number of rims. A French rider has had a look at the prices:

for 1 rim 24" : 63€
for 1 rim  24" + 1 rim 29" : 63€
for 1 rim 24" + 2 rims 29" : 86€
for 1 rim 24" + 3 rims 29" : 112€
for 1 rim 24" + 4 rims 29" : 112€
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Interesting. That looks like a website glitch to me. Unless they cover taxes themselves when the order value goes up.

Odd.

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BTW, do you have these specs for the 2022 Schlumpf hub, inboard rotor, 100mm version? Same question for the Pipifax hub :innocent:
Thanks!

I will try and get round to measuring them to be sure but we can deduce them from the latest details in the schlumpf manual.

Most wheel builders and spoke calculators want flange off sets - or basically the measurement of:

Centre of Axle to Left Flange*
Centre of Axle to Right Flange**

Annoyingly we don’t get this given in the manual but I’ve added the missing letters I think make it make more sense to this:


  • h / the red line = half of [B] - or the mid way point across the axle
  • x = distance from centre bearing to Left flange
  • y = distance from centre bearing to Right flange
  • L = from red line to left flange*
  • R = from red line to right flange**

[ x ] is arrived at by adding [E] + [D] —> 32
[ y ] is arrived at by subtracting [E] + [D] + [C] from [B] —> 10

The PCD or spoke to spoke hole measurement for current Schlumpfs is 91

Which in case this isn’t clear is this measurement as described by the UDC calculator:

The size of imaginary circle passing through all spoke holes on a hub flange (30 to 120mm).

IMG_3726

Here’s a screenshot of the spoke calculator I use that allows you to put in [ x ] and [ y ] measurements as well as hub width - in this case [B], so 100mm in the below - and it will work out what L and R are.

It beggars belief in my view that both Schlumpf and QuAx don’t provide this numbers themselves. But hey ho. There it is.

Ryan from RyanBuildsWheels shows a great way to measure hubs accurately and simply - and if you have the PipiFax in your possession and some digital calipers that would be one way to get the numbers you need for spokes or to provide to people like Light Bicycle to help them drill rims nicely.

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To be nit-picky…

I think there is a small mistake in your annotations. The distances L and R as you have calculated them are from the centre of the hub to the outside of the flanges not the inside as you have shown. Also, I think the actual measurements are supposed to be to the centre of the flange not the outside (it actually says that in your UDC calculator screenshot). So I think the values of L and R you have calculated will be too big by 1/2 the thickness of the flange…

In reality it won’t make any real difference but since you took the time to put this together I thought I should say something.

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No probs. I like nitpicky!

I think you’re right but I feel I can pass the ā€œblameā€ a tad to the diagram from Florian as the measurements there too have arrows that go to the inside or outside surface of parts of the hub - when technically it should be to the dead centre of the part - be that flange etc.

I’m zero expert - but I played around with a digital caliper and a spoke calculator until my brain finally wrapped itself around the L and R numbers. It’s simple really, but then again at times it doesn’t feel like i

Happily being a millimetre out here or there with hub dimensions doesn’t impact spoke lengths hugely. I like ERD.

But I think my arrow work could have been better.

Here are numbers for possibly popular geared options:

100mm Schlumpf 2022

Hub Details

Axle: 100mm
PCD: 91
Centre to Left Flange: 18
Centre to Right Flange: 40
Flange to Flange: 58

125mm Schlumpf 2022

Hub Details

Axle: 125mm
PCD: 91
Centre to Left Flange: 29.5
Centre to Right Flange: 52.5
Flange to Flange: 82

BrakeFast 100m Adaptor

Hub Details

PCD: 104
Centre to Left Flange: 17
Centre to Right Flange: 36
Flange to Flange: 53

I probably need to get a second hobby :joy:

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Yes you are right, it won’t make one iota of difference to you building the wheel.

Florian’s drawing and dimensioning is correct and he does actually say that dimensions C and D are to the outside of the flanges. Anyhow, it is just the engineer in me manifesting itself… :wink:

Anyhow, I am quite impressed that LightBicycle will angle the holes correctly based on your requirements, that is really quite good.

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I defer respect to the inventor / and engineers any day of the week. I’m probably being a touch salty given the issues and mistakes made with the first early batch of hubs where the stated dimensions didn’t match reality. But that’s water under the bridge.

And this is all taking the topic way off where it should be.

Yes I think LB offer a ton of small customisation that make for a nice sense of it being focused on being the best.

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