Please contact Vires Velo for all bike fitting enquires on 01953 687330


How to fit your ISM saddle

ISM seats are optimally shaped, and different to the traditional bike saddle. This is why it is so important to fit your ISM saddle correctly. The patented, anatomical design is nose-less and features two independent front arms. This results in superior blood flow, no numbness, and unprecedented comfort and performance. Due to the unique design of the saddle you will to take extra care when fitting to make sure it is in the correct position.

How do I fit the ISM Saddle?

Because the “nose” area has been eliminated, you will need to install the saddle further back than a traditional saddle – between 5 to 8 cm. If the seat feels too wide at the front, move it further back. Measure from the nose of the existing saddle to something static at the front of the bike.  Once you have the measurement then set the saddle 5-8cm further back from the existing measurement.

You also want to set your saddle 5mm (1/4 inch) lower than your traditional seat. This is measured from the top of the seat to the ground, or centre of the bottom bracket. Do not rely on markings or numbers printed on the seat post or saddle. Not all seats are the same thickness from rail-to- top so to be sure make sure you measure with a tape measure. The reason for this lower height is that you ride slightly higher on ISM seats, by resting on your pubic rami bones and sit bones, rather than soft tissue areas. Lowering the seat maintains your original body position.

Please note

For both the seat height and setback, these instructions are just a starting point. Due to the wide variety of seats, some people may need to add or subtract from the setback or height. When in doubt, consult a professional bike fit specialist.

What angle should the ISM saddle be?

Next, set the angle of the saddle. If you aim for the rails to be parallel to the ground this will naturally give a downward angle of around 2-3degrees. This is normally be the most comfortable. There is no right or wrong answer for all people, so feel free to make adjustments after your first few rides.

Getting used to the saddle

It can take some time to get used to the saddle so worth trialling a demo first. It will feel very different and you may need to stick with it for a number of weeks.

James Walsgrove

My cycling career started in 2005 when I purchased my first road bike and I was immediately hooked. Since then I have completed numerous cycling challenges including Ironman, Lands’ End to John O Groats, Mt Ventoux (all 3 ascents), London to Paris, the BBAR challenge which included a 12hour TimeTrial and more recently the Mallorca 312.