Pace RC200 Gravel / Adventure Conversion.. A little Help Here?

9sp 49/36/27

edit- of course when i say 'i can't keep up with the 'gravel bikes' on the roads.. these could easily just be road bikes with fatter tyres!?, which would explain why i can't keep up.. i'd have a closer look but they're way off in the distance 😁

..but this is what i'm aiming to build, 650b, light weight carbon forks, drops, 42-48mm tyres and faster gearing.
I am doing (and I mean that in the very loosest sense of the word, may never happen..) something similar with a much more conventional frame, but I have no allusions to keeping up with anyone. In fact, I'm most likely going with tall stem/wide randonneur style drops to keep the geometry manageable, and keeping with mtb gearing. I would guess you want to get up to at least a 52t at the front, so it would be most auspicious if your bottom bracket is 68mm, (like this Jamis). Opens up a veritable panoply of delights. I've opted for a basic GRX crankset, currently on my road bike, but that is wayyyyy too plain for a man of your tastes. You'll be wanting something much more inspired/(expensive?). Lucky, if you are 68mm down there, to have access to all the road chainsets, that will easily give you the higher end you want. (Touring triple for the win..)
Anyhoo, the point is, that this is 650b in a contemporary era 26er, with 1.95 slicks sitting in 19/20 internal or thereabouts rims, bit balloony. They sit about 52/54mm wide, and there is plenty of room. Where the stays are crimped is clearly for 26er, but wide enough to leave a ton of room. You'll be going for much wider rims, so you'll easily get away with the 42mm you desire, but maybe 48mm would be a bridge too far?
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OCDs duly triggered..
 
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9sp 49/36/27

edit- of course when i say 'i can't keep up with the 'gravel bikes' on the roads.. these could easily just be road bikes with fatter tyres!?, which would explain why i can't keep up.. i'd have a closer look but they're way off in the distance 😁

..but this is what i'm aiming to build, 650b, light weight carbon forks, drops, 42-48mm tyres and faster gearing.
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Thanks @nodding dog .. that makes me feel heckuva lot better..

These are 26 x 2.2 in an 18" frame, there is plenty of room up top with a 12mm gap but down below, the gap is only 6mm which had me concerned!

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Thanks @highlandsflyer .. if this all sounds feasible?.. i'm probably keep bumping the thread before i buy each item so i'm not making a costly mistake.. y'see, i've got a few connections around the world who can act as proxy and ship things in for me under the 'radar' but if there are any issues, a return is impossible.

Lovely @phatboytwo .. stick some carbon forks on there and your bike is almost what i'm trying to acheive.. what wheels are they?
 
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