Surely then my theory is even more valid, that there's even less benefit going from the £100 prime wheels i bought with decent tyres up to something Carbon, because they're already a decent step up from the included bike wheels.
Cheers, i've just assumed weight was weight, rather than considering rotational weight and anything else that involves physics

The main reason to upgrade would likely be to go for a deeper rim regardless of material as it's only 25mm on the Prime wheels i got.
Yeah, the hub was the reason for the switch, the cost to buy the hub was prohibitive on the previous wheels and so it made more sense to buy some user Prime wheels which already had the Sram hub.
The main reason for considering upgrades was coming from a bike with carbon deep 50mm wheels already. So therefore it feels a little like a downgrade in that particular instance on what i have already. It's also why i went this frame over something more aero as i wanted the ability to fit gravel tyres, so having 2 wheelsets which gives me the ability to switch between terrain without having to mess around with changing tyres appeals.
Yes your theory is valid, but I was trying to say you'll not have a massive speed increase over tyre choices on that good quality rim/wheel. You're not exactly going to buy the most rubbish and cheapest £8 tyres you can find, then compare them to a £50+ GP5000 on there. You're more likely to buy a £30-40 tyre to save a few quid to the GP5000, with barely noticeable difference, certainly not as big as they make it sound!
You know how deep 50mm carbons feel and sound, the alloy rims will feel 'a bit sluggish' in comparison. But just remember what you've got them for - saying some costs, something more bombproof for gravel riding and for ease/convenience in future.
Also, first attempt at lunch to install folding tyres after i'd done the rim tape.
Man, is that a pain to do vs normal wired tyres. Think i need to spend some Youtube time to get the right technique!
Defo technique/experience help massively, but also tyre+rim combination can sometimes not help! Am not familiar with how Gravel Kings are, but Prime are known to be quite 'traditional' rims (which usually means tight). Doing it indoors (so the rubber is warm and stretches easier) is a simple one to start with, I've even warmed tyres with a hairdryer in the winter to get them on rims. Just don't also heat the alloy rim as kinda defeats the object... Also hurts your fingers less! 'Massaging' the tyre around the rim also helps - this alongside the bead(s) in the centre channel is invaluable when at the roadside in cold weather. I've a clubmate who can literally mount any tyre on a rim by fingers alone, many years of it has fingers as strong as steel. But also his technique able to massage/roll a tyre around the rim while mounting it. We literally challenge him every time! Professional!
To add my two cents, I had a Giant Defy 1 2014 (with the groupset and finishing kit from a Giant Defy 3 2014) and that had the worst wheels imaginable for someone between 100kg and 115kgs. Always going out of true or spokes breaking. Replaced for some Fulcrum Racing 7's (IIRC) and they was brilliant but, wasn't as big an upgrade in terms of feel/speed compared to moving from the Giant supplied tyres to the GP4000SII. The difference was monstrous!
Totally agree and similar experience with my PR-2 wheels on the Defy 1 2015. Total crap! Especially the tyres they came with. Newer
Giant Gavia ones are meant to be kinda ok.
Long shot here, but does anyone have a 90mm road bike stem knocking about spare?
Long story short im trying to gauge improvements to my bike fit myself. Not suffering any issues pain wise on my current setup but do feel a spot over reached on my 100mm stem. Annoying i was right between frame sizes on my current bike and have "made do" since buying it, again without much issue. But want to see if I can improve it further
I actually do. It'll be an alloy Giant 'Connect' which is from my old
Defy 1 2015. I took it off and fitted a Richey 100mm when I got the frame warranty replaced in the winter. I'll dig it out this weekend.
My wife’s very lucky I’ve decided the front room is the best location to build it all up!
Good job she’s gone to bed as I watch footy!
How did it go? Apart from the BB? Love the cats look/face! 'WTF'
Sounds good. Never sure how much gravel riding there is in the UK vs somewhere like the US
Really depends on location. Fairly limited around here (Hereford) as it's more trails than gravel, so then more muddy/CX type stuff than gravel. More longer forestry type gravel trails in mid & north Wales, quite an abundance there really, but again more mud than gravel being the UK and the usual weather...!
Saw a bloke who lived 20 mins away selling some bontrager velosis shoes, brand new unused in my size for 60 pounds.
Went to see him, tried them on and decided to have them as they were comfy, fit well and were brand new as he had said. He then also threw in some bontrager elite spd pedals and some look keo cleats also brand new as he had no use for them!
Bargains mate, nicely done! Cleats alone are worth £12+!
******* had assumed the crankset would come with a bottom bracket but no such luck.
Hopefully my LBS has them as Merlín is out of stock.
Nope, they may come fitted to a frame but not really with a crankset. Have seen whole groupsets sold with them before, but not cranksets.