Me & my Mrs doing IMUK and i’m debating bike choice/set-up. Hopefully we’ll both be towards the pointier end of the race and will be looking for a decent placing. I’m fairly strong on bike and confident riding technical stuff on TT. Mrs is a veritable goat going up hills (45kg, 4.7w/kg FTP), lot’s of riding experience but she’s still not the most confident descending/riding on sketchy roads.).
Road vs Tri? (Listened to the Foggy/Brick Session podcast already).
Gearing wise? Sounds like nothing too steep, but enough draggy bits/climby bits that you’d need some lowish gears and want to avoid grinding as sounds like it will be a long day, but having something big may gain some speed, if you’re confident enough. I’m thinking 53/38 & 28/11 for me and maybe 50/34 & 28/11 for the Mrs.