26 to 700 will def need an adaptor. I’ve a Mavic adaptor on the rear of my Saracen, so that it can run 700c wheels rather than 26, think they are 28x700c tyres, with not a huge amount of clearance.Glad you pointed that out mate I thought 27 inch were the same as 700 racer wheels I had a feeling I would have to run the skinny MTB tyres so next question is is there another adapter for 700 or is this possible with out changing forks just so I know both scenarios thanks
Linkything
https://www.retrobike.co.uk/attachments/79334ab4-322b-483d-8862-e9c0721e98ed-webp.709497/