Wheelbuilding / Wheel Building / Wheel build help

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gillies

a wheelset for racing cross in winter and fast rides in summer

Using lightbicycle rims, planning on tubeless both for cross and for road.

\36mm, V - profile, 28mm ext./21mm int.(a bit lighter)](28mm external/21mm internal)

38mm V - profile, 23mm ext. width (site recommends these for 'cross)

45mm u - profile, 25mm ext./18mm int. (more aero but a bit heavier)

Or some other rim i haven't considered.

Which do I want? Only ever ridden alu clinchers so this is a bit new to me.

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andyfallsoff in reply to @gillies

Isn't that first one a v not a u profile?

The light bike U is 35mm, lighter but a bit narrower I think.

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gillies in reply to @andyfallsoff

You right - that is V. Corrected the OP

I guess i just want to understand more about widths and profiles.

Lets say I'm running 25mm in summer and 33mm (max) in winter - which rim width do I want?

Also, will a 38mm V shape be more susceptible to crosswinds than a 45mm u shape?

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