Show Us Your Bikes

[PedalUma]

That is one big azz seat.

 

[usclassic]

That is one big azz seat.

Still bothers my thighs so I am going to try these no nose seats

 

[PedalUma]

Still bothers my thighs

The best is the Bontrager Boulevard 205.

 

[Jeremy McCreary]

Something to bear in mind: Adding saddle width and padding to extend a butt-limited riding range may seem reasonable, but it's often the wrong way to go — and not just for performance riding.

Read up on your "sit bones" and how to make sure they're properly supported while minimizing contact with the rest of the saddle.

The hunt for the right saddle can be exasperating and expensive. I learned a lot from a series of trial saddles from a nearby REI store. Their large selection and generous return policy made it possible to try each for weeks and still get a full refund.

Good luck.

 

[usclassic]

The best is the Bontrager Boulevard 205.

Is that the fluid filled one?

 

[usclassic]

The best is the Bontrager Boulevard 205.

Thank you I have cancelled the two no nose saddles and will try one of these instead

 

[PedalUma]

Is that the fluid filled one?

I have not used the gel pads one. I have used them on about five bikes including my daily town bike. One was for the woman who is riding 6-hours per day, living in her tent, riding from Seattle to Maine. Supportive comfort is essential in her case. It has ventilation in the middle and there is no contact there. The ischial sit bones are supported but it also flexes quite a bit there. For fun look up ischial callosites, images. You don't want those. As Jeremy mentioned it comes with a 30-day return policy, so hang on to the box and packing materials.

 

[usclassic]

I have not used the gel pads one. I have used them on about five bikes including my daily town bike. One was for the woman who is riding 6-hours per day, living in her tent, riding from Seattle to Maine. Supportive comfort is essential in her case. It has ventilation in the middle and there is no contact there. The ischial sit bones are supported but it also flexes quite a bit there. For fun look up ischial callosites, images. You don't want those. As Jeremy mentioned it comes with a 30-day return policy, so hang on to the box and packing materials.

View attachment 200535
View attachment 200537

The most I ride is about 10 milles at a time so no real issue just nit picking. Anyway I found a used one off eBay and made an offer that was accepted it should be more than fine for my grocery runs. I was a little concerned about the fluid leaking which some have experienced but I got such a good deal it is worth any leak risk to try 20% more comfort lol

 

[PedalUma]

I found a used one off eBay

It is silicone gel, akin to the stuff around your bathtub or that seals windows and aquariums. I don't think it can leak. It is also used for breast implants so you will be riding on tits. How comfortable can you get?

 

[usclassic]

It is silicone gel, akin to the stuff around your bathtub or that seals windows and aquariums. I don't think it can leak. It is also used for breast implants so you will be riding on tits. How comfortable can you get?

View attachment 200545

It is liquid and has leaked

 

[Jeremy McCreary]

It is liquid and has leaked

Cool idea if it could be made leakproof. But I was offended by the shameless saddle fondling at 0:38.
;^}

 

[PCeBiker]

It is liquid and has leaked

I bought a pair of water filled insoles for my shoes in the early 80's
They only lasted a few days before I popped them and ended up with two soakers.

I'd rather have wet feet than a wet ass.

 

[PedalUma]

It is liquid and has leaked

Okay, I stand corrected. So it had leaked on the one you purchased? That sucks. Two more of my bikes are getting the non-fluid ones, a cargo bike from Spain and and another Gravel from England.

 

[usclassic]

Okay, I stand corrected. So it had leaked on the one you purchased? That sucks. Two more of my bikes are getting the non-fluid ones, a cargo bike from Spain and and another Gravel from England.

No no not the one I am getting, at least not yet lol. It just had been reported that a few owners had leaks after significant use. It does not seem to be a frequent issue now though. Mine has been shipped, it is a used one but does not leak.

 

[PedalUma]

reported that a few owners had leaks

It looked on the video that it was filled with white latex paint or tubeless sealant. What a mess. If you get new jeans just make sure that any staples from tags are removed on the backside.

 

[usclassic]

It looked on the video that it was filled with white latex paint or tubeless sealant. What a mess. If you get new jeans just make sure that any staples from tags are removed on the backside.

The fluid used in the Trek (Bontrager) Patent Fluid bike saddle—such as the Commuter Fluid or Boulevard Fluid models—is a proprietary, non-toxic, viscous liquid designed for pressure redistribution. It is encased in sealed chambers within the saddle's padding to move dynamically with the rider, reducing peak pressure by an average of over 20% compared to traditional gel inserts (based on Bontrager's biomechanical testing).The exact chemical composition is not publicly disclosed, as it is part of Bontrager's patented technology (likely a silicone-based or similar non-compressible, low-viscosity fluid similar to those used in other cycling comfort components). User reports indicate it is clear and water-like when it leaks, and it is not waterproof or intended for exposure.



Key Technical Details from the Patented DesignThe core of the patent revolves around integrating a sealed, fluid-filled chamber system into the saddle's padding layer. Here's a breakdown of the main elements:

• Fluid Chambers and Movement:
  • The saddle features multiple interconnected or independent sealed chambers filled with a proprietary, non-toxic viscous fluid (likely a silicone- or polymer-based liquid with low compressibility and high flowability).
  • As the rider pedals, the fluid shifts dynamically within the chambers, conforming to the rider's movements and body weight distribution. This "flowing" action prevents pressure hotspots from forming, unlike rigid foams or gels that compress statically.
  • The chambers are embedded between a dual-density shell (rigid outer layer for structural support) and an air-infused foam padding for additional cushioning.
• Pressure Redistribution Mechanism:
  • Bontrager's internal testing (using pressure-mapping sensors on riders) shows the fluid reduces average peak pressure by over 20% compared to standard gel saddles. This is achieved because the fluid disperses force more evenly across the saddle surface, minimizing compression on sensitive areas like the perineum.
  • The system is non-compressible overall (the fluid doesn't "bottom out" under load), providing consistent support while allowing micro-adjustments for different riding postures (e.g., upright commuting vs. forward-leaning fitness rides).
• Integration with Other Features:
  • Full Cutout Design: A central channel runs the length of the saddle, relieving soft-tissue pressure and allowing airflow. The fluid chambers are positioned around this cutout to target support to the sit bones (ischial tuberosities).
  • Material Composition:
    • Shell: Engineered nylon or composite for flex and durability.
    • Padding: Air foam layered over fluid chambers for breathability and rebound.
    • Cover: Durable, water-resistant synthetic leather with perforations for ventilation.
    • Rails: Steel or chromoly for compatibility with standard seatposts.
  • Accessory Compatibility: Includes a Blendr mount for integrating rear lights, enhancing safety without compromising the fluid system's integrity.

Above is grok ai response regarding the Trek patent. I think the white fluid demo is not what is actually used. There is a layer of air foam on top of the fluid cell too.