Question: Is it possible to use regular trainers/shoes (i.e., withou cleats) with clipless pedals?

A friend of mine mentioned he does this all the time. However, I cannot imagine how this would work. Surely the area of grip would be far too small to get any kind of purchase on the pedals.

We both have [Shimano PD-R540 SPD](https://bike.shimano.com/en-EU/product/component/tiagra-4700/PD-R540.html) pedals.

Answer: 
UPDATE: I use Fly Pedals now when I want to convert my clipless pedals into regular pedals. They are made of machined aluminum, light weight, and lock together so you can put them in your pocket. They cost $50 plus cleats.

[enter link description here](https://www.flypedals.com/products/fly-pedals-version-2)

[![enter image description here](https://i.stack.imgur.com/vNgzo.jpg)](https://i.stack.imgur.com/vNgzo.jpg)

[This company (started on Kickstarter)](http://anykicks.la/) makes flat platforms with straps on top and cleats on the bottom. They convert clipless pedals into toe clips. A pair runs $55 without the actual cleats.

![](https://i.stack.imgur.com/Pclzo.jpg)
![](https://i.stack.imgur.com/LrhvU.jpg)
I have used normal office shoes on look road pedals (albeit shoes with relatively thick soles) This works fine for to/from work or lunchtime errands.

However I found that pedalling on the "underside" of the pedal was more comfortable in some thin-soled shoes. Not ideal but workable.

Another option, try clipping a plastic cleat in the pedal, an older and worn-out one would be perfect. Plus you can remove it when you want to ride with proper shoes.

I have look clipless on my road bike, but I put platforms back on my MTB for trips around town, mostly because our roads are still terrible, and the MTB has better brakes and more load-carrying capacity.

Cleats may not be best for you.