I wear a blaze orange Bell Metro, which was made in 2007. I've never dropped it on a hard surface, or taken a hit, but it's seen a lot of UV and sweat exposure.

I've read that helmets deteriorate over time. Unfortunately, Bell has chosen to discontinue the Metro, and I have several snap on Metro rain covers(which is a great idea as they don't cover up the rear blinkie). Bell offers the Muni, but it doesn't appear to be backward compatible with Metro accessories----stupid!

So, should I trust this helmet with the miles and wear on it?

I think you'll be fine with your current helmet.

I don't see any reason to get a new helmet either. Keep enjoying the one you have.

5 years from date of manufacture is the rule in sanctioned sports. While it'll last longer even by that conservative rule you're still good for another year.

I went through the same thought process recently. almost dropped $120 on a Bell Volt, but decided that my Specialized AirForce 3 was fine except for the padding.

so I bought a HeadSweats thingy for $20. solved my helmet hair as well

Get a new helmet if you think the manufacturer needs the case worse than you do, or when it starts cracking and gets uncomfortable. Don't leave the styrofoam up when you leave the helmet outside; that's the only thing to worry about.

In the event that there is no drop and no crash, I use a 3-5 year rule on replacing helmets.

The only test I've ever seen reported on possible helmet deterioration is on the BHSI website. They sent a 10 year old Bell Biker that had been well used and was yellowed from UV exposure to the Snell testing lab. The result was that it passed their tests and the results were essentially identical to those obtained from that model of helmet when it was brand new.

I'd keep the Metro, but then my newest helmet was bought in '93.

There is a Bell Metro model out there. Not sure if it is the same one you are looking for - https://www.nashbar.com/bikes/Product..._10000__202113 - only in small
also available here in more sizes - https://www.bicyclebuys.com/helmets/H...BEME5PART/goog


And the Bell Citi Sport is similar to the Metro - https://www.nashbar.com/bikes/Product..._202695_10000_
https://www.campmor.com/outdoor/gear/Product___56237

Here is a comparison of the metro vs. citi - https://www.bikeforums.net/showthread...o-v.-Bell-Citi