The turbo riding just makes it 10x worse due to the positioning as you say
Take a good look at your sit bones, you may require a different saddle inside & outside!
I previously thought I needed a thin saddle as I've always had large thighs and they did rub the insides of my legs snagging some shorts on a saddle clamp when my saddle had slipped back a little. I went for a
Fizik Arione and suffered for 10 months - it was better than the older more generic fit saddles it replaced (
Giant Performance Road &
Charge Spoon) but only afterwards I realised it still wasn't right. My new Diverge came with a totally different shaped saddle (
Specialized Phenom Comp 143cm), a wider nose, non-flat profile and a central cut out. After the initial wearing in period I found it loads more comfortable. I bought another for my turbo bike but suffered again on it when riding for several hours. Keeping a similar design & width I looked for one with a more rounded nose, picked up a
Selle Italia Max Flite Gel Flow on a bit of a whim from Ebay and have found it superb! As part of my Bike fit before my Diverge the LBS measured my sit bones. I'm a 'normal'!
It's a 51cm in Rose's sizing but it's actually too big. The year after I bought it they released a 49cm which would've been a better fit. The stack is too high and the reach too far, hence the fully-slammed, 80mm, -20deg stem.
Ahhh, does explain a lot. At least it LOOKS extreme, as that's what counts!
Random but kinda related, how do you size leg warmers? I guess at your height you find them far too long, same as me! Current Sportful NoRain are turned up around 8" at the bottom...
Will be back to wearing my Knee warmers shortly (which pretty much reach the tops of my socks/overshoes anyway). Just want some thermal leg warmers for next winter which actually fit. Doubling over the bottoms just means I've a 'wedge' of warmer in my overshoe which in the really wet weather soaks up moisture. Keeps my feet mostly dry, but does mean even with dry feet I've a 4" section of leg/sock which is always soaked, cold and never dries out...
Thanks for all the advice fellas. Already had a look at a couple of YouTube vids on setting up and will be doing it myself next chance I get which will be tonight unless the rains stay away.
JB
Most important is saddle height. Usually from inseam measurement. Work from that (various ways to measure it, you may even get different results, try them all out!), erring on the side of slightly-too-low than too high. Too high will rock you on the saddle (even if you don't realise). Then use KOPS (Knee over pedal spindle) to figure out saddle fore/back. If you've any previous injuries, are duck footed or lopsided in any way then get a bike fit.
An experienced fitter will tailor the fit to you, rather than reading guides, setting the bike up to measurements and then you trying to fit onto it (as you'll be doing). I know KOPS doesn't work perfectly for me as I'm borderline Small-Medium due to short legs, even though my height I'm firmly a medium. Am riding a 54cm Specialized, and it's a better fit than the Medium (54-56cm) Giant.