A normal clipless road pedal usually has only one side for entry, while a mountain bike pedal can be clipped in from both sides.
Good luck!
When you buy pedals, I strongly recommend purchasing them at a bike shop and having a technician fit you as you sit on the bike and pedal. Each person needs their cleats adjusted differently, and there also may be differences between your left and right foot. Mark the outline of the cleat on the sole of your shoe once you have it adjusted perfectly, so when you need to replace the cleats, you'll know the correct position. Incorrectly adjusted cleats can cause knee pain! Not good for us skiers!
Also, some pedals offer a ton of "float" - allowing your foot to rotate left or right of its long axis. A little bit of float is nice, and allows your foot to rotate naturally as you go through your pedal stroke, but too much float can cause knee problems and a very slippery feel underfoot as you pedal..not very confidence-inspiring. (Speedplay "frog" pedals).
I've always understood more float = better for bad knees. Because it's not locking your knee into a strict pattern and lets it move more freely. If you're perfectly aligned and your knees naturally move in straight lines it's probably totally irrelevant, but I know my knees feel much better in pedals with a lot of float - which is part of why I like my crank brothers pedals.
Also, some pedals offer a ton of "float" - allowing your foot to rotate left or right of its long axis. A little bit of float is nice, and allows your foot to rotate naturally as you go through your pedal stroke, but too much float can cause knee problems and a very slippery feel underfoot as you pedal..not very confidence-inspiring. (Speedplay "frog" pedals).
When I raced on the track, I used a pair of Look pedals with VERY little float so my foot was locked in one position. Hard efforts are more difficult with ones foot moving around.
Ditto that...I was thinking there was something off about that when I read it earlier but it didn't completely click. My physical therapist actually recommended increasing the amount of float in my pedals if possible to help with my knee pain.

I think it depends on the individual. I had terrible problems (pain) using pedals with too much float. My coach (also a PT) had me reduce the amount of float I had on them. On the track, I used to use Look's black cleats for less/no float...it's simply too dangerous to sprint without ones foot locked in completely, and efficiency is lost in the sprint when the foot rotates....most track racers still use old-style toe clips and 4 leather straps per foot for this reason.
Beyond that, it's personal preference. For a recreational rider, it's simply going with the pedal they are most comfortable with. What is comfortable for one person may not work for another. That's why there are so many choices out there!![]()
I ride only outside but my friends in spin classes use the more common Shimano SPD mountain set up so they can use their shoes at the gym.
A quiver of shoes...........makes perfect senseI just own a separate pair of shoes for spin classes and then other shoes for riding on a real bike with Crank Brothers cleats.
I'd break it down further into the various shoes I have for different types of riding, but I'm starting to feel like Imelda Marcos...

A quiver of shoes...........makes perfect sense
I'd offer input on pedals, but I think the ladies before me have said most everything you need to know.
Hey, when you have a quiver of bikes, you need a quiver of shoes, right??
Shoes for the spin bike, very hard soled Sidis for XC riding (efficient pedaling but hard to walk in on techy trails or slickrock), rubber soled clipless shoes that are more protective and easier to walk in for techy trails where I want to be clipped in, sticky rubber soled shoes for flat pedals, and then the old pairs that I just haven't gotten rid of...
I used to have a pile of shoes for my bike stable, too. Now that I paired down my bikes to 2, I just have a pair of Sidi road shoes and a pair of Carmac mtn. bike shoes. And both pair are at least 5 years old; they just last forever.I think it depends on the individual. I had terrible problems (pain) using pedals with too much float. My coach (also a PT) had me reduce the amount of float I had on them. On the track, I used to use Look's black cleats for less/no float...it's simply too dangerous to sprint without ones foot locked in completely, and efficiency is lost in the sprint when the foot rotates....most track racers still use old-style toe clips and 4 leather straps per foot for this reason.
Beyond that, it's personal preference. For a recreational rider, it's simply going with the pedal they are most comfortable with. What is comfortable for one person may not work for another. That's why there are so many choices out there!![]()