If I were you I would go for the Koomus its good they always have a good product when it comes to Bike or car mount holder

Check this product it works very well

Koomus BikeGo 2 Bike Mount Holder Cradle for iPhone 6 6+

I went with this one, and it works great. It is very secure.

http://www.amazon.com/gp/product/B007FHCR20/ref=oh_aui_detailpage_o05_s00?ie=UTF 8&psc=1

I think the Arkon Bike Mount is the most secure because unlike the other universal mounts (which is all that is sold right now) it has elastic band that go around the front to hold the phone in place. With the other mounts I would be afraid that on bumpy terrain the phone could fly out.

Enjoy your ride!

Rokform Sport Series Bike Mount Ultra Light Sport Series iPhone 6 Bike Mount and Case Kit - Black

This one is by far the best.  It uses a quarter turn locking thing that has a spring the engages when the case is locked to the mount.  Fallen a bunch of times and never lost or damaged by iPhone 6.

Personally believe that Studio Proper's offering is the cleanest and most functional for those looking for a road bike compatible mount.

I agree with having an elastic band to hold your phone in, but not across the front of the device.  This mount by Aduro holds your phone into a spring loaded grip by the four corners so it doesn't get in the way of the screen.  And unlike a lot of the others I've seen here you don't have to keep your phone in a special case to use this.  It works with all smartphones, even up to the iPhone 6 Plus.  My full video review is below if you're interested.

http://youtu.be/vshV7-xJDwA

Go with Koomus they are durable and strong

I use Rokform but a buddy has koomus and loves it. I found it on Amazon for under $16 on Amazon.

@freedaze Are you still a fan of your Rokform? Do you use it on your bike pretty regularly?

Love my Rokform.  The thing is their cases work with all sorts of their mounts.  I use it on the bike a lot but daily in the car with their magnet mount.  What kind of phone and bike do you have?

I've got an iPhone 6 and looking for a new case to use with my bike and in the car. I have a Trek 820 mountain bike but I've been shopping around recently for hybrid. I think this may be the case for me. Do you have the iPhone 6 as well or an earlier iPhone? It sounds like people love the earlier versions but there've been some complaints with the quality of the 6 cases.

I have a 6 personally and a 6+ for work. Both work well and the way their stuff works is you can use the same mounts between phones. I didn't like how life proof and other mounts require a whole new mount to fit different size phones. My last phone was a 5.  Did not notice anything wrong with the quality. I have fallen with the phone and mount on and the only thing damaged was me.

Sorry to keep pestering you, but do you have the aluminum case or the plastic/rubber case?

I bought both the sport plastic one and a aluminum fusion one. I prefer to ride with the plastic one so I can keep the metal one clean and scratch free.

I recommend this one. Or order on their site rokform.com they have a promo for a free universal mount when you spend 49 bucks. I signed up for their email list and get emailed specials all the time.