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I've been interested in building a similar set using IRD Aero rims. Do they feel much faster than Open Pro style low-profile, non-aero rims? Can you tell the difference when charging along on the flat?
Based on the few test miles undertaken on these wheels, they do spin up fast, and seem to hold speed on the flat better than Open Pro style rims. Apparently they are quite a bit stiffer, even though weight is within 30gms. Quite hard to quantify the real world difference due to the relatively short test ride, and of course the 240s hubs are like butter - not sure what contribution they make to feel.
They are really nice to climb with as well though, being relatively light at 1475 gms (incl. Veloplugs) and feel plush & comfortable. I have not put a massively high tension into the wheels, (120 kgf rear drive side is pretty average for 24 x CX Rays; front spokes at 99 kgf for 20 x CX Rays could go another 10 kgf safely but I prefer to ensure the hub flange isn't unnecessarily stressed and I don't feel any lateral movement so I reckon it's high enough) and this probably helps the plush ride, but the rims are definitely not harsh even if they are classified as stiff. Way smoother and forgiving than Ksyrium SLs. By the way bike forks are Columbus Muscle, which are a little compliant.
IRD Aero and Kinlin XR300 are exactly the same rim, manufactured by Kinlin, same also as French RAR aluminium wheels, some Eastons, and I imagine a few others. Rim depth is 31mm, so intrinsic aero advantage is probably modest compared to a 21mm deep clincher, not forgetting the lower thin-bladed spoke count in combination probably helps.
Howard
Ndeipi
Gav86
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For Sale: New hand built wheelset Road DT Swiss
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Handbuilt, light yet robust (1470 gms) aero wheelset.
240s Hubs (24 rear in 2x both sides; 20 radial front) These alone cost £370 new the pair, and these are brand, brand new!
CX Ray spokes all round. Sapim Alloy nips.
31mm black alloy rims, (XR300 Kinlins which is the same wheel as Interloc Racing (IRD) Aeros. Kinlin is Taiwanese and makes the rims out of Niobium - Scandium if you follow Easton; ie a hardened alu alloy stronger than 7000 series). Includes Veloplugs, included in the weight of the wheelset.
Tensioned to 97 kgf front, 119 kgf rear drive side. Meticulously measured and remeasured until perfect uniformity achieved with a DT Swiss Tensiometer - very, very accurate. Suitable for riders up to 92.5 kg.
Shimano 9/10 speed freehub (can be switched v easily with a campy freehub)
Ridden 10 miles for testing purposes. Responsive wheels, spin up fast with magic carpet ride. Really smooth ride.
These are £675 wheels, save yourself £200. £475.
Nick 07828 170250
View NW2 London