I have 25s on my bike and from a width perspective i have plenty of room. I'm concerned with the height profile of the 28s. Does anyone know where to get the tire height specifics?

Marathon Plus HS 440 | Schwalbe North America

Art.No." ETRTO Size Performance PSI Weight EPI Load Tube
11100766 25-622 700 x 25C SmartGuard 85-115 595 g 67 75 kg 15,*20
11100767 28-622 700 x 28C SmartGuard 80-110 750 g 67 85 kg 15,*17

Thanks for the help

Height is essentially equal to width, as the tire takes a more or less round cross section under pressure.

Tire height varies based on the width of your rims... Measure how wide your 25s actually are with a caliper, and assume that the same ratio will hold true for a wider tire. Measure from the inside of the rim (spoke bed) to the outside of your tire, and apply that same ratio to find out if there's a good chance of it fitting... Near in mind, squeaking by means gravel, etc, crashing into the fork crown or brake.

If you don't want to do math, you'll have to guess.

Buy one of the tires and install it.

Check clearance everywhere around the tire. I have 2 bikes where the front derailleur mechanism is the tight spot for the rear tire, which otherwise has tons of room ;0(

Also know that tire labeled sizes are not actual sizes, EVEN if on the same rims and EVEN within the same tire model line. Many tires run narrower or wider that stated "widths". And this then means height too. Also tread cap thickness or tread cap shape comes into play when things get tight. There is no substitute for actual mounting on the wheels in use and in the frame in question.

Or buy a tire.

They require an 1/8" of clearance for faired rear wheels on TT bikes. While that might work on a clean road on a nice day, I prefer at least 1/4" all around on a road bike.

You'll want 1/2" or more for trails, especially if you're running tires that will pick up stuff.

I was hoping to avoid buying the tire and doing a bit of math and measuring beforehand.

thank all for the replies...