We’ll make this a great experience

It’s our mission to provide you with world-class hospitality every time you visit us online or in-store. We’ll always take care of you. It’s the Trek way.

Awesome free shipping options

All accessory orders over $49 ship to your home for free, and all accessory orders ship free to your local retailer for in-store pickup.

30-day Unconditional Guarantee

If for any reason you’re not 100% happy with your online order from trekbikes.com, you can return it in like-new condition within 30 days. No questions asked.

Learn more

Bontrager Aeolus Pro Bike Saddle

Model 581633

Aeolus Pro brings comfort, power, and speed to road riders looking to dig deep and rotate further forward into a more aero position. This uber-light, race-ready saddle was tested and pressure mapped with male and female athletes for the ultimate in proven performance. A shorter overall length with a wider nose and full cut-out ensure targeted support that eliminates soft-tissue pressure for both men and women.

Product details

inForm saddles are born of cutting-edge biomechanical research to maximize performance and rider comfort
Designed to support riders in an Aero Road riding position
Full saddle cut-out minimizes soft-tissue pressure allowing for a more powerful, rotated position
Two sizes designed to align saddle with bone structure for both men and women and avoid soft-tissue compression
Oversized carbon rails for lightweight strength. Specific seatpost ear clamps required
Lightweight carbon-reinforced shell provides perfect balance of weight, strength, and compliance
Minimal Pro-level padding offers sleek profile that shaves weight
Available Blendr accessory mounts to cleanly integrate rear light

Full Comfort and Full Power

The all-new Aeolus is a lightweight aero road saddle that uses a full cutout and the latest biomechanical research to minimize soft-tissue pressure while maximizing power and sustaining comfort.

Watch video

"The shell has a generous curvature, which encourages you to stay put"

"Comfort and targeted support in an aero position"

"Minimize soft tissue pressure for both men and women"

Get all your favorite apparel from over 80 of the world's best cycling brands delivered right to your doorstep or local Trek retailer when you shop our curated online collection. If you're not 100% satisfied, you can return your purchase within 30 days for a full refund.

Shop all gear

Get an inside look at how the company got its' name, why it decided to start it's life in a barn, and more!

Planet Earth is our home and our responsibility —we must do our part to preserve it. Learn how you can join the #GoByBike movement and help make a difference in the future of our planet and all who call it home.

Wondering how to properly fit that new helmet you just got? Need some tips on how to ride with your kids? How about ways to be more visible to cars? We've got that and a whole bunch more!

Learn more

Trek culture is who we are, what matters to us, and what we do as a brand. Take a look behind the scenes at Trek’s global headquarters.

There's a lot more to Trek than making the world's best bikes and cycling gear. Learn more about everything Trek is doing to make the cycling space safer, more inclusive, plus a whole lot more fun.

1of3

Bontrager XXX WaveCel Road Bike Helmet

$149.99 $299.99

black-0 swatch
black_brown-1 swatch

Bontrager R3 Hard-Case Lite TLR Road Tire

$76.99

black-0 swatch

Bontrager Comp Road Pedal Set

$89.99

black_grey-0 swatch

Bontrager Blendr Saddle Accessory Mount

$6.99

black-0 swatch

Bontrager Comp Multi-Tool

$15.99

black-0 swatch
bluedark-1 swatch

Trek Velocis Women's Cycling Bib Short

$159.99

black-0 swatch
bluedark-1 swatch

Trek Velocis Cycling Bib Short

$159.99

black-0 swatch

Rapha Pro Team Training Cycling Bib Short

$210.00

black-0 swatch

Rapha Pro Team Women's Training Cycling Bib Short

$210.00

1of7

We make saddles for all riders, and the most comfortable saddle is the one that best suits your anatomy. Riders who are assigned male tend to have narrower pelvis bones and are best suited for 145mm saddle widths, while riders assigned female typically find the most comfort from 155mm width saddles.

Aeolus features a full cutout that uses the latest biomechanical research to eliminate soft tissue pressure and maximize power and sustained comfort for riders in an aero road riding position.

The split design of the full saddle cut-out extends from the nose through to the rear of the saddle to minimize soft tissue pressure and allow for a more powerful, rotated position.

Aeolus has a wider nose with a shorter overall length that ensures the whole saddle is usable and comfortable, whether you’re sitting up on the hoods or hammering in the drops.

The rails are housed at the very front of the saddle which allows the entire saddle shell to flex and conform to the rider for increased compliance and added comfort.

Aeolus is designed and tested to work well for a wide range of riders of any body type and gender, and is available in multiple sizes to provide the best individual fit.

You can get a Blendr accessory mount that attaches securely to the rear of this saddle for clean integration with any Bontrager Flare rear light. There's still enough allowance for a seat pack, too.

Aeolus is optimized for the best fit and performance, so it’s slightly shorter than a traditional saddle. When swapping out your old saddle, we suggest starting with an extra 10mm of setback from the nose and a 2 degree downward tilt.

Good news! This saddle is compatible with the Blendr accessory multi-mount to attach the Blendr Saddle Bag, Blendr Fendr, and rear light. Carrying your flat kit, keeping your kit dry and clean, and being seen has never been easier.

Blendr Saddle Bag

If for any reason you're not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.

Learn more

Our guide will help you pick the perfect saddle for you and however you ride.

See the guide

WARNING: Extended riding with a poorly adjusted saddle, or one that does not properly support your pelvic area, can cause injury to your nerves and blood vessels. If your saddle causes pain or numbness, re-adjust the saddle position. If after adjustment your saddle still causes pain or numbness, consult your Trek dealer about further positioning or replacing the saddle with one that better fits you.

Learn more

WARNING: Only use a Bontrager seatpost that has 7x10 rail clamps or has two seat clamp bolts. Non-approved rail clamps can cause the saddle rails to break, which could cause a loss of control resulting in serious injury or death.

Size	250mm x 145mm	250mm x 155mm
Length	250mm	250mm
Width	145mm	155mm
Fit color	Yellow	Blue
Rail dimensions	Oval 7x10mm (Oversized)	Oval 7x10mm (Oversized)
Cover material	F-24 (soft touch)	F-24 (soft touch)
Rail material	Carbon Fiber	Carbon Fiber
Weight	170g	173g

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Prices shown are manufacturer's suggested retail prices.

Weights are based off pre-production products at time of publication. Weights may vary in final production.