It is plastic, you can cut it. It's not all that easy to do without scratching the shaft, I'd suggest getting it hot so it cuts easier. It can be done.

 

Thanks! Have you seen inside of this shock? I found a comment somewhere the 2.5mm spacer is alloy. Not sure from which year or about the 5mm spacer though...

 

The fox spacers are usually alloy

 

The Jeffsy is a great bike! However as many of us have learned the DPS does not play well with Jeffsy's progressive geometry. A better shock will transform the performance of the suspension...i've read similar statement on other bikes as well. Read through the PB Jeffsy threads to learn what others have done and put a linear air or coil shock on your upgrade list.

 

Hi there, I have a 2020 Stumpjumper ST with a 190x42.5 mm Fox DPS shock. After reading this thread I came to the conclusion, that I might be able to do the same to my shock since Specialized offered the Stumpjumper ST in a 27.5" combo the exact same shock in 190x45... Riding the Stumpy ST with a 140mm Fork and 130mm shock would sound like the perfect sweet spot for me. Furthermore, Specialized offered the Stumpjumper ST in the limited downieville version which has the exact same frame, Geo, shocklink and so on paired with a 190x45mm shock so clearance shouldn´t be an issue

If I have read and understood correctly, I could simply get rid of my alloy spacer ( which happens to be exactly 2.5mm in thicknes) shown in the picture below to get the rest of the 45mm stroke length and therefore close to 10mm of more travel Am I right on this ?

Thank your for your answers and best regards from Germany

Bruno