I was considering switching tyres on my Scott CX Comp during the dry weather. It has Schwalbe CX Comp 35-622 (28 x 1.35) tyres on it at present and I am having a devil of a job trying to match this size in a smooth tyre. The rim size is 622-14 from what I can read.

Can anyone advise what size of tyres would be suitable.

I would go for 700cx28mm tires for a cx frame.

Many thanks, I have noticed that the spare tube the dealer put in the cycle bag is 700x28/38C.

I'd probably go with 28s also. You could probably even go down to 26 or 25 if you wanted.

Existing tubes might get a little difficult to stuff into 25s, really have to watch it on the install.

Plenty of choices out there. Search for 35-622 or 700x35c smooth tire to bring up a bunch to choose from.

Schwalbe Kojak is the exact same size, 700 x 35c, and 100% Smoooooth

Fortunately, recently the rim sizes have been somewhat standardized.

700c = 29er = 622
28" may also be the same size???

A smaller outside diameter tire will change your ride somewhat though.

Some folks not in the American Midwest have been referring to 700c tires as 28" for a long time, as I understand it.

622 is the ISO size, which is also the diameter of the bead seat in millimeters. 28 has been used from time to time in the UK for tubulars, and Continental uses it for their trekking (700c hybrid) tires.

Vittoria has been putting 28" on their tubulars for a long while, too.

Target took up calling their hybrids 28" bikes a couple of years ago.

The tyre on the bike does have 2 sizes on it. One is 35-622 and the other 28 x 1.35. This was what confused me about the sizing. I was not sure what sizes would fit the rim.

Welcome to the wonderful world of bicycle tire sizes. There's so many tire size standards that everyone can have a different one!

Read this if you have trouble falling asleep. It's a sure cure for insomnia: Tire Sizing Systems

Many thanks, I had tried reading that yesterday but found it so riveting that my attention became distracted by a spider climbing the wall. However, I have now read it more slowly and kind of understand it better now. It does make me wonder now if I am wise to try to fit a 700 x 28 tyre where I currently have 700 x 35 fitted. Or maybe the difference in width is not that great to matter.

With the rim you described earlier, no- you should have no issues. Refer to this chart: Tire Sizing Systems

Take some time and look through the Sheldon Brown site. It is a wealth of basic bicycle knowledge.

From 35 to 28 you will experience a fairly significant change in ride quality. The 28s will likely be lighter, which is a good thing, but your butt will notice the decreased volume. I'd factor your road conditions into the decision.