Xiamen Carbon Speed rims/wheels

[Sander2177]

I find it confusing, so I'll just ask, what's the difference between Steel or ceramic bearings ? I've got that ceramic is lighter, but concerning the durability, I've read that ceramic is better somewhere, and steel is better somewhere else, where is the truth?

Ceramic is great if you use Ceramicspeed as they have a lifetime warranty.
Personally if products come with ceramic I will  take them.
But generally these are cheap Ceramic bearings as are the steel and they don’t last long I will then upgrade with high quality steel bearings like NTN.

[toxin]

Ceramic balls are harder, so they will wear slower, but require the steel races to be treated to be harder or the ceramic balls will wear them out quicker. In the bike industry, Ceramicspeed are probably the best regarding this and they last a very long time

You will hear claims about efficiency from brands selling ceramic bearings, but most of it is bs. The difference in material makes virtually no difference for bike applications. The biggest difference will be in the viscosity of the lubricant inside the bearings, and the seals on the bearings.

[MarMirZ990]

Nice! ceramic bearings or steel? If steel, it means that your different hub & 20 instead of 21 spokes saved c.30g vs my spec. (ceramic bearings are lighter).

Ceramic bearings. I was not keen to get ceramic bearings, but since they come standard with the 20H hubs…

Ceramic balls are harder, so they will wear slower, but require the steel races to be treated to be harder or the ceramic balls will wear them out quicker. In the bike industry, Ceramicspeed are probably the best regarding this and they last a very long time

I think they use as special high nitrogen steel for the race, Cronidur 30 or something?

[meysow]

I was considering buying a set of the new 24IW from Peter, for the spokes it's easier, carbon spokes tend to be stiffer and weight less, but steel spokes are more comfortable and maybe easier to change/to service ?
But for the bearings type I'm a bit hesitant, and don't know which one to opt for, considering I value durability and ease of maintenance (I'm not necessarily chasing those few watts here and there)

[Rolle2k]

Anybody running the D50CU-33 or D65CU-33 with GP5000 S TL 30 or 32mm? If so, what measured width are they on these rims? I'm waiting for my D50CU-33 wheels, and i'm simply wondering about which of these i will go for.

[patliean1]

Anybody running the D50CU-33 or D65CU-33 with GP5000 S TL 30 or 32mm? If so, what measured width are they on these rims? I'm waiting for my D50CU-33 wheels, and i'm simply wondering about which of these i will go for.

Yes. 32c GP5000 STR. Stretches to 34mm at the rim.

[Rolle2k]

Yes. 32c GP5000 STR. Stretches to 34mm at the rim.

Great, ill probably go for those then. 30mm would probably be better aero, but i think i rather take the comfort.
Bought T1100 50mm with CX Ray spokes, ended up at 1275gr for the pair. Quite nice.
Will be fun to compare D50CU-33 with GP5000 S TR 32c vs Elite edge gravel 45mm deep with Caracal Race. Both great tires, but this wheel setup will be over 200gr lighter per wheel. The elite ones weight 1380gr without tires.

[simplemaths]

Has anyone in the US ordered recently? I suspect purchases would incur tariffs, correct? Was really looking to get a wheelset soon, but perhaps I'll have to wait.

[Tom77]

Great, ill probably go for those then. 30mm would probably be better aero, but i think i rather take the comfort.
Bought T1100 50mm with CX Ray spokes, ended up at 1275gr for the pair. Quite nice.
Will be fun to compare D50CU-33 with GP5000 S TR 32c vs Elite edge gravel 45mm deep with Caracal Race. Both great tires, but this wheel setup will be over 200gr lighter per wheel. The elite ones weight 1380gr without tires.

I own the 33 with 26 inner and installed a Michelin Power Cup 30mm which came up 34mm and a Vittoria Corsa Pro 30mm which came up 32mm.
The Michelin is wider with a rounder shape, the Vittoria mire pointy in the middle, bot sure which ones I will ride.

[Tom77]

My friend measured a conti gp5000 30C at 32mm on that 33 wide rim. Which is why i chose 30C on 33 rim, in fact, for the rule of 105. For a heavy rider, aka, me, at the back i'd put 32C though. The 3 friends i ordered these rims for are all light enough that i did 30C front and back.

I read on bicycle rolling resistance that these michelin tyres aren't meant for wide rims, because the thread pattern that's meant to be rolled on is very narrow. But last time i checked i feel like the widest they made was 28C, so this might have changed. But it's because of that that i never bought them. I'm french, i'm curious how they compare w GP5000, given the rolling resistance tests pretty much the same and they're usually a tad cheaper.

I read the same, but I had a 28mm Michelin Power Cup (non-TLR) on 21 inner and the 30mm (TLR) on 25mm and now 26mm inner.
Narrow indeed, but will work.

The new Pirelli seem to be fine also.

[kjerts]

I find it confusing, so I'll just ask, what's the difference between Steel or ceramic bearings ? I've got that ceramic is lighter, but concerning the durability, I've read that ceramic is better somewhere, and steel is better somewhere else, where is the truth?

I opted for steel on the 20H hub. 1170g for D50CU-33 T1100 20H w/ 3.8mm carbon spokes. Have not seen anyone post significantly lighter ceramic version of these.

[Rolle2k]

My friend measured a conti gp5000 30C at 32mm on that 33 wide rim. Which is why i chose 30C on 33 rim, in fact, for the rule of 105. For a heavy rider, aka, me, at the back i'd put 32C though. The 3 friends i ordered these rims for are all light enough that i did 30C front and back.

I went for the 32mm GP5000 s tr tires since i'm used to gravel tires, comfort is important for me. I was also thinking about going the 30mm instead for aero reasons, but at the same time i'm probably a to week biker for even noticing the difference

[Daviddavieboy]

 FWIW another data point. I am running 32mm gp5000 AS TR tires on a set of Peter’s 24mm internal wheels and they measure 34 mm inflated to 55 PSI.

[MarMirZ990]

I run:

28 mm Conti GP 5000 on the 33 mm OW/26 mm IW rims, stretching to 31,5 mm @72 PSI
32 mm Schwalbe G One allroad 33 mm OW/26 mm IW, stretching to 37,4 mm @40 PSI

I did my first 95 km test ride on the T1100 20/20H carbon spoke wheel set yesterday. Compared to the T800 Sapim CX Ray set, it is ~ 180 g lighter + what ever the difference between GP 5000 and the G One is. The ride feels similar to the non-carbon spokes wheel, maybe a little bit harsher.
Concerning acceleration and cross wind stability, I think the difference is also only marginal.
Once again, I was amazed how „easy“ it is to accelerate beyond 25 km/h compared to my old alloy Mavic wheelset. I rode > 35 km/h in sectors where I previously only did ~ 32 km/h, but maybe that was only the hype for new equipment.

The biggest difference between T800/Sapim and T1100/Carbon was in my mind, what happens when I hit a big pot hole? After the first hour, I gained trust into the carbon spokes and rode the wheel set more or less like I always do. Of course avoiding bigger pot holes but not minding manhole covers etc.

Overall I am also very satisfied with the T1100 wheel set. Would I go with carbon spokes again for the minimal gains? Only time will tell..

[ejump0]

because my 28mm Powercup clincher had a sidewall cut before my biketouring trip, i put on 28mm gp5k clinchers as thats what i have around. 

on my d50cu-33, powercups balooned to ~32mm, while gp5k got to like a lil under 30mm.
as the gp5k sidewall kinda flush to rim wall, i think if you are taking onto some gravel part, its best to go bigger tire to protect the rim lip as i already had few scratches