Patented Universal Underseat Bicycle Shock Absorber for city and all-terrain cycling

Rinsten Spring
Protecting your knees and smoothing the ride
Risk free: LIFETIME warranty,
Money back guarantee within 90 days
Rinsten Spring comes with a Lifetime warranty, so if something happens to your spring within these years, you can easily exchange it for free. We will send you a new one and pay the delivery fees.

100% satisfaction guaranteed, or return your money within 90 days!
We offer a 90-day money back guarantee on Rinsten Spring. No worries, no questions!
More than 99% of customers love Rinsten and we don't know why you might want to return Rinsten Spring, but in any case, within 90 days of purchase, Rinsten Spring can be returned for any reason.
In 90 days you will feel exactly how Rinsten Spring works and how it absorbs the bumps in the road. The main thing is to adjust the angle of the saddle and stiffness of the Rinsten Spring to suit you. Just give it a try!
We do refunds after we receive the goods, try it sooner with only shipping charges.
Health and comfort, not just another accessory
Because of a seated position, a cyclist can't use feet and legs as a natural shock absorber
A group of scientists from The University of the West of England, led by John Parkin, PhD in transport engineering and his colleague Sainte Cluque, E., began research "The impact of vibration on comfort and bodily stress while cycling"

The scientists discovered that the surface condition is the principal factor that affects the vibration value. It turned out that in almost one hour of cycling the rider is exposed to vibration comparable to that of a tractor operator during half a day of field work
Adding comfort
Our spring damps vertical and lateral impacts and vibrations and adjusts to pelvis bending during cycling. Thanks to our spring your back literally "sticks" to the seat and doesn't shift. This allows you to apply less effort when riding and avoid injuries. This shock absorber makes your cycling comfortable and keeps your body healthy

Hardness of the spring can be adjusted to your weight, riding style and terrain you cycle on

Rinsten Spring
We apologize, but Rinsten Spring is currently unavailable for purchase.
We are preparing a new version of Rinsten Spring and hope it will be introduced to the world after the war in Ukraine.

This Spring is a best mechanical under seat shock absorber with adjustable stiffness, which can be adapted both for city and all-terrain cycling. Easy to install, easy to adjust. Color: Black. Weight: 337 grams or 0,74 lb

Suitable for riders of all ages, from 10 to 150 kg (22 — 330 lbs)
For road, city and all-terrain bicycles
For children&adult

LifeTime Warranty

Rinsten Spring Installation&Adjustment:
I have a few recommendations for setting up Rinsten Spring for your ideal comfort:

1 Always start with the toughest settings - above and below - 0
With the most stringent settings, you get the lack of buildup, only a decrease in the level of vibration.
Changing the settings to the numbers 1,2,3 ..... 9, you make the settings softer and softer.

2 The number at the top should always be greater than or equal to the number at the bottom! This is due to the design of the spring. Violation of this recommendation may cause Rinsten Spring to work incorrectly.

3 It is very necessary to set the angle of the saddle so that you have a perfect fit while riding. When installing Rinsten Spring, your saddle will be tilted forward, so that when you sit on the saddle, it will take a horizontal position or have a small angle of inclination forward.

4 The seatpost should be lowered 5-6 cm. Usually this is enough to compensate for the height of the Rinsten Spring. But some consumers lower both to a lower height, and to a greater one. This is due to the fact that many cyclists have changed sensations from riding and reduced the effort that needs to be spent to turn the pedals.

Spring can be mounted and adjusted
in under 5 minutes.
Compatible with 99% of all modern bicycles.
Supported by more than 5000 backers
For me it's personal
I got back on a bike after a 10-year break. I bought a high-end bicycle from a well-known manufacturer. It surely had an excellent sports seat. However, after long rides I started to feel uncomfortable — I felt pain in my arms and back. I've tried every existing solution on the market.
Having failed to find an optimal solution on the market, I decided to develop a seat post that would be simple and reliable, easily adjustable for any weight, any road, and bicycle and make every bike ride enjoyable. To do this, I set up a team of engineers and mechanics

We've spent 3 years on research, tests, and sample production

Project history
An idea and first 5 working prototypes after 18 attempts
It was a long way from draft sketches on paper to set of complete prototypes for endurance testing
Kickstarter campaign:
900% funded
We were lucky to gain huge support from our backers, the project was funded
Production and fixing production issues
We had a bumpy road with numerous calls and countless trips to the factories, to get reliable quality control and production set-up
The final product is available
on the market
As of January 2019, we have made our project available, with the lifetime warranty and worldwide shipping
Worldwide shipping

We will email you once your order is received in our system and is being processed. You will receive another email confirming when your order has been shipped from our warehouse and you will get the tracking number to get your order. The order is usually sent from our warehouse in 2 - 4 days.

There are still many good projects in the world that recommended to you:
  • Free cycling safety app, Busby connects you and your precise location to your loved ones if you have an incident. It's better to be safe than sorry.
Feel free to contact us if you have any questions or suggestions. We really love to hear your thoughts about our product and see how you use it —
If you want to become a Rinsten distributor or dealer,
please contact us via

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