Zeta Saddles
Optima TI 155mm Bike Saddle
Optima TI 155mm Bike Saddle
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Versatile Comfort for All-Day Riding
OPTIMA Ti 155mm combines ZETA's patented Reactive Padding™ technology with a wider platform for riders who need extra support and comfort. Whether you're tackling technical trails, grinding out gravel miles, or logging long road rides, this saddle delivers physician-engineered comfort without the weight penalty of traditional wider saddles.
Why Riders Choose Optima Ti 155mm
- Patented Reactive Padding™ Technology – Gold-standard comfort system that protects against pressure points and soft tissue compression across all riding styles
- 155mm Width – Wider platform provides enhanced support for moderate to upright positions, ideal for endurance riding and technical terrain
- Titanium Rails – Durable, corrosion-resistant construction at just 290 grams—significantly lighter than comparable comfort saddles
- Multi-Discipline Performance – Excels on mountain bikes, gravel bikes, touring setups, and endurance road bikes
Engineered for Real-World Riding
The 155mm width strikes the perfect balance between support and performance. ZETA's Reactive Padding™ technology provides dynamic shock absorption that responds to your body's movement—essential for technical mountain bike trails and rough gravel roads where traditional padding compresses and loses effectiveness. You get consistent comfort mile after mile, whether you're climbing singletrack or settling into a long endurance ride.
Who This Saddle Is For
Optima Ti 155mm is built for riders who need versatile comfort across multiple disciplines: mountain bikers tackling technical trails, gravel enthusiasts on mixed terrain, road riders in more upright positions, touring cyclists, and anyone who values all-day comfort without sacrificing performance. If you need a wider saddle that doesn't feel bulky or slow, this is your solution.
Technical Specifications
- Width: 155mm
- Weight: 290 grams
- Materials: High-quality nylon composite shell with titanium rails
- Designed and engineered in the USA
Find your perfect fit: Download our sit bone measurement guide to confirm 155mm is your ideal width.
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Find Your Perfect Fit
Measure sit bone width and add 30 to 40mm then choose the closest width.
For more sizing information go to the CORRECT SIZING page.
Let customers speak for us
from 108 reviewsI have been a life long cyclist. I have a box full of seats in my garage. None of them are comfortable. I tried the Zeta on a whim and immediately fell in love with it. I mounted it on my Pinarello X7. It is a marriage made in heaven. I will be ordering another for my second bike. Marc F.
I have bought 5 Zeta Saddles...one for all my bikes and a spare. I can ride 4 hours with no pain with the Zeta saddles...Excellent product
Awesome seat! I like this seat so much I purchased 1 for each of my 4 road bikes.
I have gone through multiple saddles looking for one that didn't make my sits bones ache and my crotch go numb after 30 minutes. I finally found it!. I was hesitant to try it after all the other disappointments but it paid off. Great product.
I have tried many many saddles. Zeta saddles finally get me pain free on my longest rides. I have three of their saddles, one fir each of my bikes.
I had the same saddle for years as it fell apart because I couldn't find a comfortable fit. I now have an amazing saddle. In fact i have two. Thank you.
I replaced my Trek saddle with my new favorite - Optima TI 155mm saddle. I’ve only put about 100 miles on it so far, but am very pleased. I am able to stay in the saddle longer with no discomfort. I love the saddle, just wish I had made the change earlier!
Have given both seats a good workout up here in the snow and am pleased to say they’re both keepers. Not sure what is different about them other than that I hardly notice them at all. One improvement though, would be to make a version without a see-through relief hole. Mud season is now upon us trail bikers in the worst sort of way.
The Zeta saddle is the best saddle out there.
This saddle just disappears under you.
I have 4 bikes and every one has a Zeta saddle on it.
The saddle is comfortable, eliminates numbness, and I don’t have to keep repositioning myself on the seat…it stays put. I have bike seat on my road bike which also works as my indoor bike trainer on my Zwift Hub, and works great.
So great, I am going to order one for my e-bike!
I have the Ultima 165mm Bike Saddle on all of my bikes. Two years ago I was getting desperate to find the comfort I'd lost as my bottom got skinnier. The Ultima 165mm Bike Saddle saved the day! Patrick sent a note with my latest purchse promising some swag in the future - would love to represent Zeta to my cyling friends with a ncie hat!!
I am completely satisfied with the Optima S bicycle saddle from Zeta. All three of my bikes are equipped with this model.
It’s got comfort and support in all the right places.
This is the third Zeta saddle I have ordered. I am putting them on all my bikes. These saddles have alleviated sit bone pain and eliminated skin chaffing.
I have tried several saddles but have found the Zeta saddles are the most comfortable especially on longer distance rides. The padding system they developed really works. My wife and I have been replacing our other saddles with Zetas on all our bicycles..