Winter gloves (for below zero)

I think that it's difficult to make hard and fast recommendations because everyone is different. My Hestra Windstoppers are great down to 0°C, but below that I've got an oldish pair of Pearl Izumi gloves that served me down to -8°C last year. They are quite bulky so I only use them when the weather justifies them. This looks like a close equivalent in their current range: https://pearlizumi.eu/en-gb/collections/all-cold-weather/products/amfib-gel-glove?_pos=2&_fid=802416882&_ss=c

In theory the lobster gloves should be warmer still, but I've never fancied trying them myself. https://pearlizumi.eu/en-gb/collections/all-cold-weather/products/amfib-lobster-gel-glove?_pos=1&_fid=802416882&_ss=c

I commuted a bit over an hour through the last 2 or 3 winters using planet X carnac gloves, Carnac ultimate do me for all but the coldest days (I was leaving 6am ish so cold enough, even in balmy surrey), the really cold weather ones I think used to be called Carnac Ultimate Endurance - don't seem to be on the website anymore but I think the Pleuvoir are the same. I found that if you put them on in the house you minimise that 10 minutes at the start of the ride where your hands are warming up the gloves and you have cold fingers.

The crab hands are probably warmer still but I never felt the need and like Davebradswmtb I just didn't fancy having my fingers bunched up.

They are also pretty cheap

https://planetx.co.uk/collections/gloves

As @davebradswmb said it is tricky as we all feel the cold differently. My only advice is at proper sub zero temps, I have found layering to be the only really effective way of not freezing to the point of hands going numb. I have a thin pair of assos liner gloves (about the thickness of a white cotton glove) which I wear under some Endura primaloft winter gloves. It probably doesn't matter which gloves you use, as long as you can get a thinner glove inside a proper winter glove/mitt. You could also try adding something like a disposable nitrile glove in between the thin layer and the winter glove if you really suffer badly.

I've used various generic winter riding gloves with liner gloves when really cold, however when doing longer rides at really cold temps I have some mountain equipment g2 alpine ski / mountaineering gloves that i use. I did try some lobster gloves for a bit but tbh didn't get on with them.

Thin silk liner gloves work well. Most of the heat is lost from the airflow over the gloves. Make sure the gloves are completely wind proof. You could also try using the disposable gloves from a petrol station over the silk liners and under the gloves. Unlikely to sweat much if it's that cold.

Interesting that you find the Bontrager gloves don't work for you, as that was what I was going to recommend, as they really work well for me - very long gauntlet glove, pretty much like a skiing glove, but with more flexibility.

I forget the model, something like RXB, but they are no longer made - I bought a 2nd pair for stock as I liked them that much.

Sounds like you either need liners, and or heated gloves as has already been touted - I hope you find the right solution.

Just saw these: https://www.spatzwear.com/collections/january-sale-2025/products/spatz-thermoz-deep-winter-gloves-with-fold-out-wind-blocking-shell-thermozz

No personal experience of the gloves, but the brand are well regarded, however the reviews in the main say they are too thin!

I guess MvdP is working harder than most of us.