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Jetstream TT Helmet

4.35 out of 5 stars
20 Reviews
Color:Matte Black


Size Chart


Why We Like The Jetstream TT Helmet

The Jetstream TT helmet offers a great combination of speed and safety elements. The polycarbonate material creates a lightweight aerodynamic helmet that also has high impact resistance. Equipped with both MIPS and Koroyd layers, this helmet will reduce impact to the head during a crash.

With five air vents, optimal airflow is created so that you can stay up to speed on race day. A low profile y-strap divider is also in place to help with aerodynamics. The Jetstream also features a magnetic visor for easy removal to switch between two lenses, a basic clear lens and the color enhancing ChromaPop.


  • Helmet designed specifically for time trials
  • Built with MIPS and Koroyd layers for maximum brain protection
  • VaporFit adjustment system allows for 270-degree fit
  • Magnetic visor comes with clear and ChromaPop lenses
  • Sweat-activated odor control from ionic anti-odor lining
  • Item #SMIZ9EZ
Shell Material
polycarbonate with Koroyd liner
Audio Compatible
5 vents
Fit Adjustment
Vapor Fit
2 shield lenses included (ChromaPop and clear)
Complies with U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and Older, EN1078
Claimed Weight
[size large] 410g
time trial, triathlon, road cycling
Manufacturer Warranty

Overall Rating

4.5 based on 20 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 4 reviews
4 Stars - 2 reviews
5 Stars - 13 reviews

What do you think about this product?


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3 out of 5 stars

July 30, 2023

Great but not perfect

This helmet has decent cooling and looks fantastic!! Unfortunately, you (still) can't get replacement lenses... It also wants to slide down your head however tight/loose you have it causing the lens to rub your nose (using electrical tape for padding). The adhesive that holds the felt'ish pads near your ears have been failing as well.. so if your ok with customizing this helmet, it's great! But out of the box needs some work, and hope you don't damage your lens.! Despite the issues, I still rave about this helmet to anyone that asks.

Nick H.

Originally reviewed on

5 out of 5 stars

December 26, 2022

triathlon helmet

looks great, fits good, it is light as a feather. should reduce my times on the bike, and my last name is smith. Who could ask for more.

robert s.

Originally reviewed on

5 out of 5 stars

October 27, 2022

I’ve only ridden with this

I’ve only ridden with this helmet for 20 miles but I already love it. The fit is perfect and I can wear my large glasses with this TT helmet which I could not with others. And it looks very cool. Two thumbs up.

Jeffrey M.

Originally reviewed on

3 out of 5 stars

October 19, 2022

Good but....

Thus far I wore the helmet once. It was during an IM 70.3 and it was pouring rain. The fit is nice and aero but the magnet that connects the visor to the helmet is NOT strong enough. It was pouring and my visor was totally fogged up and I couldn't see anything. I was trying to get my fingers in the inside to wipe away the fog and pop, the visor flew off. Totally bummed and devastated. So buyer beware as I don't even see replacement lenses on the site.

Scott B.

Originally reviewed on

3 out of 5 stars

October 18, 2022

Although sleek and a nicely

Although sleek and a nicely designed aero helmet (that is comfortable and light) I do not like the new design. I was a HUGE fan of the former Podium TT design and was much looking forward to some similarities, but there were none. What I favored most in the previous design was a much more rounded edge at the back vs that elongated "aero" point at the back. In my opinion the Jetstream's material felt almost too light, sort of thin and flimsy. I wanted to like this one a lot but I guess I just miss my Podium TT. Will definitely still rock it at races and rep the SMITH brand though. Thanks for this opportunity to share.

Rawn D.

Originally reviewed on

5 out of 5 stars

October 6, 2022

So so glad I made

So so glad I made this investment, absolutely love this helmet!!!

user image
James L.

Originally reviewed on

5 out of 5 stars

September 17, 2022

Love this helmet! Such a

Love this helmet! Such a great look. It is extremely light

Natalie O.

Originally reviewed on

4 out of 5 stars

August 23, 2022

Overall the helmet was very

Overall the helmet was very good! Very comfortable! The one thing I will say is that the lens seemed to keep fogging.

Andrew C.

Originally reviewed on

5 out of 5 stars

August 17, 2022

Comfortable and fast race helmet

Very comfortable and light TT helmet. Love the magnetic visor!

Bill B.

Originally reviewed on

5 out of 5 stars

July 23, 2022

Racing helmet

I use this Smith helmet for racing in the sprint Paratriathlon And have enjoyed being able to use the visor instead of sunglasses and also it is easy to put on and fits well on my head.

Deb C.

Originally reviewed on