Xiamen Carbon Speed rims/wheels

[volan]

im still undecided between d50cu-33  t800 or t1100 version, but im planning to put michelin powercup 28, as theyre wider than average 28's

If you wanna some reference: I went with t800, d50cu33, inhouse hubs, cxray and brass nips - 1420g.

[Kofsw4]

im still undecided between d50cu-33  t800 or t1100 version, but im planning to put michelin powercup 28, as theyre wider than average 28's

I've been using 28mm PowerCups on 24mm internal rims and while the tyre casing is wide (meaning the tyre blows out to about 31.5mm) the tread width definitely isn't. I can see from the scuffing that I have been riding on the sidewall quite a bit. I wouldn't recommend those tyres for rims that wide, and probably only for 21-23mm internal width.

[Icyseanfitz]

d50cu-28  t800, in house hubs, carbon spokes, 1316g. Can't wait to get them in hand.

[ejump0]

I've been using 28mm PowerCups on 24mm internal rims and while the tyre casing is wide (meaning the tyre blows out to about 31.5mm) the tread width definitely isn't. I can see from the scuffing that I have been riding on the sidewall quite a bit. I wouldn't recommend those tyres for rims that wide, and probably only for 21-23mm internal width.

oh well..
.... the tires have arrived. mine's the clincher ver.
worse comes to worst, i'll just put on my rears, on both future d50cu-33 n my parcours chrono, since they seems have better puncture protection that gp5k clinchers 

[RiegelundGel97]

d50cu-28  t800, in house hubs, carbon spokes, 1316g. Can't wait to get them in hand.

Is That a Glossy finish?

[Icyseanfitz]

Is That a Glossy finish?

Yeah glossy with some small decals

[zett]

Yeah, I don't really understand why many (?) people here are going for those 26 mm inner width rims for road use with narrow tires. ETRTO recommendations don't exist for nothing. You can usually go a bit further than recommended, but it's a bit of a gamble.

Unless you want to to exclusively run 32+ mm tires, don't get those rims!

That said, it would be great to see something between 21 mm and 26 mm rim width. Something like 23 or 24 mm would be pretty versatile.

[bremerradkurier]

Yeah, I don't really understand why many (?) people here are going for those 26 mm inner width rims for road use with narrow tires. ETRTO recommendations don't exist for nothing. You can usually go a bit further than recommended, but it's a bit of a gamble.

Unless you want to to exclusively run 32+ mm tires, don't get those rims!

That said, it would be great to see something between 21 mm and 26 mm rim width. Something like 23 or 24 mm would be pretty versatile.

I'm running the 50x26 IW Carbonspeed wheels with  38c Schwalbe Pro One tires and the ride quality is incredible.

[kubackje]

Yeah, I don't really understand why many (?) people here are going for those 26 mm inner width rims for road use with narrow tires. ETRTO recommendations don't exist for nothing. You can usually go a bit further than recommended, but it's a bit of a gamble.

Unless you want to to exclusively run 32+ mm tires, don't get those rims!

That said, it would be great to see something between 21 mm and 26 mm rim width. Something like 23 or 24 mm would be pretty versatile.

Then get the new uni rims from yuanan that are 23iw and 32 external

[biceryder]

Finally got my hands on the wheelset and so far I'm happy with it. 65mm rim with 26mm internal with in-house hubs and pillar 1420 spokes weight just under 1500g. The paintless finish looks fantastic. 30mm Schwalbe Pro one measures around 33mm and sits flush with the rim

What frame are you running these on?  What’s your max clearance? 

I want to run 32mm tires on a new frame with a max clearance of 32mm.  Wondering something like the 26mm IW/33mm EW is pushing it a bit far unless I get something like the LT 301D.

[Serge_K]

What frame are you running these on?  What’s your max clearance? 

I want to run 32mm tires on a new frame with a max clearance of 32mm.  Wondering something like the 26mm IW/33mm EW is pushing it a bit far unless I get something like the LT 301D.

32C clearance, or 32mm? There's no standard. Sometimes a seller will start saying 30C, then start saying 32C instead because it's what clients want to hear. My lt268 has plenty of clearance for 34mm, or more. Velobuild 177 claims to clear 32C but various users showed that it doesn't.
Best is to ask the factory for the CAD drawing and how much space there is between seat stays. That's what long teng sent me when I inquired before ordering my lt268.
In theory, 32C clearance should allow you to run 32C with a 33mm rim. For aero purposes, I'd suggest 30C on 33mm rim though, as the 30C will measure wider than 30 on a 33 rim.

[c.etzo]

as reference, in my tt-x38 with rims 25 iw and 32mm gp 5000tlr they are 33mm real
and this is the space in the frame that claim 32 max tire

can't wait to receive the t1100 wheels

[biceryder]

32C clearance, or 32mm? There's no standard. Sometimes a seller will start saying 30C, then start saying 32C instead because it's what clients want to hear. My lt268 has plenty of clearance for 34mm, or more. Velobuild 177 claims to clear 32C but various users showed that it doesn't.
Best is to ask the factory for the CAD drawing and how much space there is between seat stays. That's what long teng sent me when I inquired before ordering my lt268.
In theory, 32C clearance should allow you to run 32C with a 33mm rim. For aero purposes, I'd suggest 30C on 33mm rim though, as the 30C will measure wider than 30 on a 33 rim.

Serge,  thank you for the clarifying information.  I mixed up clearance with wheel width.  I’m leaning towards the CS-R01.  Peter sent measurements of the chainstay which put it around 38mm at the narrowest.  By my estimates that would give the frame 2.5mm (5mm total) on either side to clear a 33mm OW wheel.  I like to go as wide as I can to support 30-32mm tires.  I’m just unsure if 2.5mm is enough clearance or pushing the limits of what the frame can support.

[Macedingle]

Are you not susposed to run a 28c tire on 24 internal rims?

[Sakizashi]

Are you not susposed to run a 28c tire on 24 internal rims?

ETRTO guidance and UCI rules would say no—so as of mid last season this would be an illegal combination for racing on the basis of safety. While blowoffs are the catastrophic failure, the more common issue of too wide of a rim is riding on the sidewall and getting more punctures.

The C on tire sizes has nothing to do with width—it’s the designation for the bead seat diameter (BSD) of the rim (622mm). The format you all are seeing are looking at is referring to the different dimensions of the rim. 700 is a size designation that is supposed to the OD of the system at some arbitrary tire size that was historically used. The only place where this is still relevant is for 650b vs. 650c. Tires are specified in the format of [size designation]x[width][BSD].

Actual tire width for road tires is specified on a different rim width thats sort of standard and sort of manufacturer dependent. Most 28s are specified for a 19mm or 21mm IW rim for example and most 32s are to a 23mm or 24mm IW rim. 34+ is usually true to size on a 25mm IW rim.

To make matters worse there are two different ISO standards for tire clearance to the frame. 6mm is the off-road standard that gets used on a lot of allroad and gravel bikes. Some manufacturers (e.g., Trek) use 6mm on their road bikes too. 4mm is the road standard that also sometimes gets used for allroad and gravel bikes.

If you want to make sure a tire / rim fits your bike the best thing to do is measure or get a dimensioned drawing of your bike frame to compare. Most fork and frame manufacturers can provide this if its not in the listing.

TLDR: for road widths 23mm IW width rims give you the most options. 24mm-25mm is good too as it allows you to fit 30s. Measure your bike and the tires. You probably want 4mm of clearance on all sides of the tire and similar to the rims.