Just arrived for testing 25mm wide 50mm deep carbon clinchers. The ERD is 545mm and they appear very round.

The rim tape bed is smooth.

I went for this finish and you can see the profile.The internal width is 21mm.

The weight of the rim is 499g and the other was 498g. I bought a 20H for the front and a 24H for the rear.

I built the wheels up with a Sapim CX-ray spokes and Miche Primato hubs.

The rims are very good to build with some of the best I have ever built with in fact. They are very round and very flat. This means very even spokes tensions (+/- 5%) and the both wheels were <0.2mm round and 0.1mm latera wobble.

Velo plugs did not fit the spoke holes. The tyres mounted are GP4000s 23mm which mearured up at 26mm wide after fitting so a flat tyre to rim profile which apparantly is a bit moe aero.

The weight of the wheels built is 1650g but that is with 450g Miche hubs. If lighter hubs are used, cheap Novatec A291/F482 or more expensive DT Swiss 240's Chris King R45 or extralite hub then a wheelset close to 1500g is possible or less (1400g) with the right hubs.

The ride with the wheels is sublime. Handling is impoved compared to the very same tyre on a narrow Kinlin XR-200. The extra weight is not that noticeable but the aero benefit is at higher speed. I don't want to take them off now. Braking is very good even though I am usinglight but flexy KCNC CB1 calipers with cheap Baradine carbon pads. Anything that CB1 caliper brake well has to be good.

It is a wheelset that do not want to take of now. Wide is good if you have the clearance.