New Disc Road Wheels

Plenty of studies online now showing wider at lower pressure is more efficient on typical roads; 100 psi seems way OTT, I run 75 f /90 r on 28's and I'm 95kg plus.

As for wheels, I have 2 pairs of Scribe, but from the cheaper / more heavy duty end than £600 would buy. A few clubmates reckon Hunt are ace. I'd have thought for that ballpark you'd be into carbon territory.

Freehubs are quite buzzy though, because of the ratchet drive system.

Wheel wise, I’d want light and aero.  Something like these….

https://www.huntbikewheels.com/products/hunt-40-carbon-aero-disc-wheelset
https://www.sigmasports.com/item/Vel/38-RL-Carbon-Tubeless-Disc-Wheelset/QS1Y
https://www.sigmasports.com/item/Vel/50-RL-Carbon-Tubeless-Disc-Wheelset/QS28

A few forum members have purchased the Vel wheels so will be able to comment on them.

I have all sorts of wheel depths. 40mm is perfect for me, covers all weather and I prefer the aesthetic of 40mm on a non aero bike. My 60mm wheels do get knocked by winds. 40mm significantly less so. Last night was very gusty and while I could feel the wind pushing me and making me lean over on long open sections of road, the wheels/bike were planted.

Tyre wise. When I raced I was also in the 23/25mm and rock hard camp. I now ride tubeless 38mm at fairly low pressure for most rides. I do a lot of mixed rides where the extra tyre width is a blessing.

My out and out road bike has 30mm tyres on it. Challenge Strada, tubeless. Most comfortable tyres I’ve ever used. I really rate them…..but I have been known to choose aesthetics over function!  I’ve had no issues in running them for years, apart from a nail that would have killed any road tyre.

The new tubeless GP5000 is also supposed to be very good. I had the older version and seating them was almost impossible. New version has resolved that. By all accounts they’re one of the fastest tyres available.

Maximum pressure on GP5000S TR is 73, at least on hookless rims. Which tells you something. 25mm is pretty much the minimum these days, and for less racy bikes it seems that 32mm is increasingly common.

I have some Hunt carbon wheels on my gravel bike and they are very nice wheels for the money, but the freehub is noisy, but then the DT Swiss internals in my Giant SLR1 carbon wheels aren't exactly quiet.

Some of the guys in our club have the Sigma Sports own brand wheels and reckon they are excellent - they certainly look like a bargain -
https://www.sigmasports.com/item/Vel/50-RL-Carbon-Tubeless-Disc-Wheelset/QS28

<edit> Ha! @w00dster beat me to it on the Vel wheels.:-)
Also, I've had no problems with the GP5000s, either current or previous, on the Giant rims</edit>

I have Vel wheels for my gravel bike. They're quite buzzy (though I don't find them annoyingly so).

I think £600 buys you some really nice alloy wheels (could get some hand-built with nice hubs for that price)  I've got a set of Pacenti Forza alloy rims on Hope hubs that are lovely.

Or you're toward the bottom end of the carbon wheel market - generic Chinese hubs + rims with various branding (Vel, Prime, etc) If you're wife is light weight and not hard on wheels i reckon the cheaper carbon wheels will be fine - if she's a wheel smasher, then i'm not so sure..

I don't think you'll get much better than those DT Swiss wheels that you have linked to be honest. An aero wheelset would be faster but will cost at least twice as much and won't come with DT Swiss hubs.

I don't bother with tubeless on the road. Punctures are too infrequent and changing a tube at the roadside is too easy.

Tyre width 28mm is the sweetspot I reckon. Have been up the 32 but prefer 28. Definitely don't put 25's on - just worse in every way (aside from some very very marginal aero gain). Higher pressures are most certainly slower on anything apart from a velodrome. I'm 68kg and put 60psi in a 28mm tyre.

There's lots of BS around internal rim width and I wouldn't base a decision off that. Any modern rim will be fine. External width and depth are only important on an aero wheel, which as mentioned just doubles your price, so unless you want an aero wheelset then I would ignore.

The slight disadvantage of those DT Swiss wheels is the straight pull spokes being harder to replace. Having said that, broken spokes are pretty rare these days and DT Swiss are one of the biggest wheel companies so I can't see it being too much of an issue.

I'm a recent convert to road tubeless - 28mm Pirelli (superb), at 65psi, for my 14st is as fast as 25mm at 100psi with tubes but a huge amount more comfortable.

I'd buy something like this and save the money. I have some Prime Race wheels have been on the gravel bike and used and abused and still going strong

https://www.wiggle.com/p/prime-attaquer-disc-alloy-wheelset

I'd go with the DT's as you'll easily be able to get replacement freehubs, end caps, freewheel gubbins etc for years down the line.

Unless there's something else with DT or Hope hubs out there within budget.

I have some alloy Hunt on my gravel bike and they are quite buzzy, I have carbon 50 VELs on the road bike and they are more buzzy. Not necessarily louder but a different pitch. My riding mate has carbon Hunt wheels and they are also loud.

I rate both sets of wheels for the money, ended up getting my Carbon VELs for £400 and am really please with them for that, however neither are what I would call quiet!

I’ve had the Vel 50s for almost 2 years, easy to set up tubeless,  not too bad in a crosswind, zero issues to date, nice buzzy rear hub (if that’s your thing) and subtle branding (I hate loud graphics on wheels).  If you want aero then it’s a recommend from me.

For alloy the DTSwiss linked above look good.  I’ve also got a set of alloy DTSwiss as spares and again zero issues before swapping to the Vels.

Have a set of Mavic Kysrium SL's on my road bike with 28 Conti tubeless.  Pretty much as light as most Carbon wheels and more comfortable for UK's bumpy roads, especially with the 28 tyres.  Plus in windy conditions, the slimmer profile of the Kysrium's doesn't get buffeted around like my old deeper section carbon wheels did.  Perfect wheel for UK riding IMO.

Scribe do some very nice wheels
Scribe® Cycling: High Performance Bike Wheels. – Scribe Cycling UK

I have Prime 38mm wheels which are superb. Amazingly comfortable (which I was not expecting) and silent.

She’s very much of the pump them up to 100psi to go faster mindset (whether that’s right or wrong!)

It's completely wrong, and it also prevents you using tubeless. Hundreds of articles out there on this. I'm 90kg, I used to ride 23c at 100psi, now I ride 28c at 60psi tubeless and it's just better better better by far. Faster and way more comfortable. Don't stick to outdated knowledge.