Witterings

I'm seriously thinking about doing a charity ride but I have a 29er with more MTB orientated tyres on it and if I'm going to do a 50 miler on road thought maybe it'd help if I had some more road friendly tyres.

I'm currently running Schwalbe Smart Sam's ... has anyone any suggestions that have a reasonable level of puncture protection that might make a difference / easier ride over that sort of distance or won't it be that noticeable in comparison to what I have? .... I can go down to 1.75's in width.

The charity in case anyone's interested is Canine Partners ... their website is here https://caninepartners.org.uk/

and a video I absolutely love about how it can make a difference to someone's life here

If anyone happens to be based in West Sussex and fancies lending me a road bike to do it on instead you have my instant attention

UniChris

If you're only going to do it once, just riding it on those is probably the most sensible. 50 miles is really not all that far, and if it's unusual for you're mostly going to feel it in the saddle.

It likely only makes sense to change if you think you're going to ride on paved surfaces regularly. I regularly see knobby tires on delivery guy's bikes that have never left pavement, and bike commuted with the same error outside Boston half a lifetime ago...

But if you don't really ride in situations where your current tires are appropriate anyway, then by all means change.

Witterings

You're spot on about feeling it most in the saddle I'm sure

I think I'm also considering something much more road orientated that might be able to deal with the occasional gravel tracks here in the summer as the balance of my riding is heading more in the road direction but don't have the funds for another bike at the moment.

I meant to mention in the original post I believe my wheels can go down to 1.75 ... I may edit the original post as well.