Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: I can't find the size of my mountain bike pedals. Is it safe to assume that they are 9/16in?
Document: these work great and are much better than my previous mountain bike pedals that didn't have any grip.These are the standard size for mountain bikes.
These pedals have good grip and solid construction but the make alot of noise. I can't figure what it is either because they feel just fine when I spin them but add a little weight say my 270 pounds of muscle and presure from my stride and crunch is what you hear and some times feel. Yet there is nothing I can find wrong with them outwardly. I wiggle them with my hand too and they sit solid. So it's strange.
I like these pedals. They look good, and operate well. Just be sure to order the right size, mine were 9/16". These seem to be of high quality, and for light to moderate use should last for many years to come. I am also pleased with the quick delivery and the price was fair.
These are great open bearing pedals. They are made by Wellgo who make some very good (and some run of the mill OEM) pedals. The XLC Pedals are extremely stout and well constructed. These are some heavy duty pedals. I prefer this "cage" type of pedals over the studded "platform" type of pedal eg. :Diamondback Sound Pedal (Black Alloy, 9/16 - Inch, Pack of 2)for my Mountain Bikes.
If you're wondering about what type of bike these fit, I have them mounted on my 1988 Specialized Streetstomper. Standard 9/16.
Good pedals for the price. When I received the pedals, the bearings were grinding to tight though. I had to adjust them to loosen the lock nut slightly. To do this, I used a 15mm wrench to remove the old pedal from the bike(yes the thread is 9/16, but not the outer axle - its 15mm). Remember the left pedal is threaded backwards, so clockwise will remove it.
Well made, solid construction and a great price for pedals of this quality. These are 9/16&#34; pedals, so be sure they will fit your bike.
I had to replace a pair of alloy/resin pedal that was beginning to crack on the resin portion due to a collision. Once I found out which size my bike needed, I ordered them and the pedals fit perfectly. They are only a bit heavier than the alloy/resin ones which is to be expected because these are all metal. A trade off I don't mind as the difference is almost negligible and more durable.
The pedals work fine on my mountain bike and I would recommend them to anyone looking for good metal pedals.
Good tough pedals. I put them on my mountain bike that I ride occasionally. They feel very solid and work as expected.
Answer: yes