Xiamen Carbon Speed rims/wheels

[toxin]

how much do the 20h hubs weigh?

[PeterXu]

how much do the 20h hubs weigh?

Since the spoke tension on carbon spokes is much higher than regular stainless spokes, to make sure stable quality, we don't make these hubs extremely light like someone else do, our new 20/20H straight through version hubs weigh around 290g

[toxin]

Is it possible to get the hubs anodised in a custom colour?

Still in the middle of running cfd to decide which rims I go for. XMCS 65 with carbon spokes is a candidate for the rear. Sadly all off the shelf carbon spoke hubs are minimum 20 spokes at the front, so will have to go with steel for that.

[PeterXu]

Is it possible to get the hubs anodised in a custom colour?

Still in the middle of running cfd to decide which rims I go for. XMCS 65 with carbon spokes is a candidate for the rear. Sadly all off the shelf carbon spoke hubs are minimum 20 spokes at the front, so will have to go with steel for that.

Sorry, negative for just single hub to do anodised custom color. Unless we happen to do the exact color anodising as you want, but mostly it won't happen, ours hubs are anodised in black or titanium color.

[c.etzo]

Wheels received Yesterday, weight confirmed at 1209 gr for T1100 D50CU-33 rims 21/21H UD paintless
Taped with 30mm tubeless tape without any problem
Complete wheelset included Shimano mt800 160+140 , gp5000stlr 32mm and ztto slr gen3 cassette
Total weight Is 2205 gr

[KaiDeus]

Got my D50CU-28 T1100 in the Mail. Wheels look great, packaging is very good and overall quality seems to match expectations.

One caveat are the actual rim measurments. Actual measurments are 22mm internal and 29mm external instead of 21.4mm internal, 29,2mm external.
With the wider internal and narrower external width a 28mm gp5000 s tr measures 29mm and sits flush with the rim profile, so no rule of 105% to achieve here, if your don't want to have a 25mm tyre, which most of us certainly will not want. So in some way the rim profile is neither here nor there, neither fit for narrow nor really fit for wide tyres. I will get on with it, but this difference to the advertised measurments is the worst difference you can have in a rim profile. Both rims measure the same btw, so i don't think this is a unit variation problem.

Measurements done with a digital caliper and at multiple locations.

[acino]

I find complaining about 0.7% difference in measurements quite remarkable.

Also, how confident are you that 0.6 mm narrower rim would give you actual tire width that conforms to the 105% rule?

[toxin]

29mm is the fastest tyre size on rhat rim at low yaw

[acino]

I received my pair of D50CU-33 T1100 just before Christmas. With CX sapim spokes and inhouse hubs - weight of 1320 g. A bit higher weight because opted for rims without holes and as I learned, it means no carbon spokes available. I also opted for brass nipples. Built with GP5000 TR 30mm, real width 33 mm, and a total weight with ultegra cassette, 2x160mm disc rotors and aliexpress valves - 2440g. Excellent quality, beautiful hubs. Only done about 120 km so far, due to shitty weather and snow here in Switzerland, but really happy with it so far.

Excellent service and support from Peter!

[TidyDinosaur]

I find complaining about 0.7% difference in measurements quite remarkable.

Yeah, those are rounding errors... And why would you complain about wider rims these days

But hey, if you can't keep up with the next group ride, you know what the problem is...  It's that 0,001% deviation...

[KaiDeus]

I forgot I'm in a cercle jerk. I'm just pointing out a difference in the rims from advertised measurments. I thought more information is always better. In the end you can take any learning from it that you want.

As you read in my post I'm very pleased with the overall quality. Following the 105 rule is obviously rather anal, but the original rim profile is designed to follow it, why wouldn't you want to know that it measures a bit differently.

I ride a lot in crosswinds so a good performance at yaw angles larger than 0 is a feature I want in a wheelset.

Would I be not satisfied with the wheels, I would have send them back, but I didn't.

[ancientone]

Got my D50CU-28 T1100 in the Mail. Wheels look great, packaging is very good and overall quality seems to match expectations.

One caveat are the actual rim measurments. Actual measurments are 22mm internal and 29mm external instead of 21.4mm internal, 29,2mm external.
With the wider internal and narrower external width a 28mm gp5000 s tr measures 29mm and sits flush with the rim profile, so no rule of 105% to achieve here, if your don't want to have a 25mm tyre, which most of us certainly will not want. So in some way the rim profile is neither here nor there, neither fit for narrow nor really fit for wide tyres. I will get on with it, but this difference to the advertised measurments is the worst difference you can have in a rim profile. Both rims measure the same btw, so i don't think this is a unit variation problem.

Measurements done with a digital caliper and at multiple locations.

I don't think it's going to make much of a difference but it's always good to know and feedback. :-) I think it's sort of expected if you buy parts from China although I think Peter held himself to a different standard.

I order a 52mm headset bearing once and the seller send me a 51mm, and claim that it was variance due to manufacturing... that was a WTF moment since all the bearings I had bought previously was precise to 0.1mm.

Anyway, looking forward to the rims from Peter. Still thinking about the Frameset though...

[toxin]

As you read in my post I'm very pleased with the overall quality. Following the 105 rule is obviously rather anal, but the original rim profile is designed to follow it, why wouldn't you want to know that it measures a bit differently.

Rule of 105 is horseshit, it's the closest to useful at 0 yaw and even then it's not accurate. As soon as you start adding any yaw, it breaks down completely

[wintermute]

Rule of 105 is horseshit, it's the closest to useful at 0 yaw and even then it's not accurate. As soon as you start adding any yaw, it breaks down completely

Saying it breaks down completely is even more facetious than saying if don't abide to the 0.1mil you may as well run box sections.

So you think brr drum tests are meaningless because 'nOt ReEl LiFe'. 

[Icyseanfitz]

Just measured my dc50u wheels which should have an internal width of 21.4, pretty much spot on at 21.5 and that could just be a fault in my calipers